Chapter 15: Mood Disorders: Depression Review

Welcome back to The Deep Dive, everybody.

We have a massive stack of materials on the desk today, and honestly, this one feels a bit different.

Yeah, it really does.

Usually we're connecting dots across a bunch of different articles or trends, but today we are going into full study buddy mode.

Exactly.

We are laser focused on a single critical text today.

We're looking at chapter 15 of Essentials of Psychiatric Mental Health Nursing.

Right, and for anyone listening who thinks, oh, a textbook chapter, that sounds incredibly dry,

stick with us here.

Please do.

Because this isn't just about passing an exam.

I mean, we're definitely gonna help you do that, but this is about one of the most pervasive, debilitating and misunderstood conditions in human history, depression.

It is literally the leading cause of disability worldwide.

Worldwide.

That is a staggering statistic when you really sit with it.

It really is.

So our mission today is pretty clear.

We are gonna deconstruct this chapter for you.

We're gonna decode the dense medical jargon, the pharmacology, the assessment tools, and we're gonna translate all of that into plain English.

Because we wanna give you the why behind the what.

So when you are actually standing there in a clinical setting, you aren't just memorizing a list of symptoms.

You are seeing the actual human being in front of you.

Exactly.

Because when you're on the floor, you don't have the textbook open in your hands.

You really don't.

You have to rely on your ability to recognize suffering and crucially, knowing how to intervene safely.

So consider this your comprehensive audio guide to mood disorders.

We are gonna walk through the text exactly as it is presented, section by section.

Let's just dive right in then.

The text opens with the distinction that I think trips up a lot of people, even people who have been in healthcare for a long time.

It's a difference between mood and effect.

Oh yeah, that's a big one.

In casual conversation, we use them interchangeably all the time, right?

Like he's in a bad mood or he has a bad affect.

But clinically speaking, they're two very, very different things.

They are distinct.

And keeping them straight is absolutely vital for your charting.

You have to get this right.

Think of mood as the internal climate.

It is entirely subjective.

It is how the patient feels on the inside.

Okay, so if I say to you, I feel like I'm in a dark pit, that is my mood.

Correct.

And only you can tell me that.

I cannot guess your mood, I have to ask you.

Now, affect is the external weather.

It is the objective, observable response.

So what you can actually see.

Exactly.

It's what I, as the nurse, see on your face, in your body language, and what I hear in your tone of voice.

So just to put this in a really concrete clinical context for everyone, if a patient tells me I am incredibly happy, so that's the mood, but they are staring at the floor, their voice is totally monotone, and they haven't moved a muscle in an hour.

Then you have a mismatch.

And you would document that the mood is happy, but the affect is flat or blunted.

And that incongruence is a significant clinical finding.

It might indicate a complete lack of insight, or it might point to a specific type of disconnect that we see in certain severe disorders.

And the text talks about this happening on a continuum, right, like it's not just a binary happy or sad.

Right.

Picture a number line in your head.

On the far left, you have severe depression.

In the middle, you have normal, which clinically we refer to as youth fighting.

And then on the far right, you have elevated or manic states.

We all fluctuate along this line a little bit every single day.

That's just being human.

But mood disorders happen when you get stuck at one of the extremes and it starts to really interfere with your life.

That right there is the key phrase, isn't it?

Interfere with your life.

Because everyone gets sad, everyone has a bad week, but the text emphasizes over and over that clinical depression is different.

It is not just the blues.

No, it's functional impairment.

That is the threshold we are looking for.

Depression leads to painful levels of low self -esteem.

It completely erodes a person's quality of life.

It creates this profound sense of hopelessness and helplessness.

When you can't get out of bed to go to work, when you can't connect with your kids, when you stop bathing, that is pathology.

There's another concept right at the beginning of the chapter that I found really, really helpful for framing all of this.

The text distinguishes between a disease and a syndrome.

Correct.

And it classifies depression as a syndrome.

Why is that distinction so important for a nursing student to grasp?

It's a nuance that fundamentally changes how we approach treatment.

So a disease usually has a specific known cause and a very consistent biological path.

Think of strep throat.

Right, cause and effect.

Exactly.

We know it is caused by the strep posterior.

We can swab for it.

We can see it under a microscope.

We give antibiotics, it goes away.

But a syndrome is a collection of signs and symptoms that tend to hang out together.

But we do not have a single smoking gun cause.

So depression is more of an umbrella term.

It's a massive umbrella.

Underneath that umbrella, you have a huge variety of presentations.

One person's depression might be purely genetic and biochemical.

Another person's might be caused by chronic severe trauma.

Another might be triggered by a medical issue, like a thyroid problem.

Wow, okay.

Yeah, they all look like depression on the outside, but the roots are entirely different.

Which perfectly explains why treatment is so incredibly tricky.

What works for the genetic depression might not even touch the trauma -based depression.

Precisely.

And the text makes a really poignant point right here.

It says, it is incredibly difficult to convey the anguish of severe depression to someone who has never experienced it.

I highlighted that exact line.

It's almost like they are in a completely different state of being.

They are.

It is not just sadness plus.

It is a distinct quality of suffering.

And as nurses, our job, even if we don't personally get it, is to validate that anguish, to just sit with it.

That's powerful.

Let's move into the hard data now.

Section one covers epidemiology and comorbidity.

Basically, who gets this?

And the numbers in the source material are honestly staggering.

They really are.

We mentioned the WHO data earlier that it's the leading cause of disability worldwide.

But if we look specifically at major depressive disorder, or MDD, the lifetime prevalence is roughly 28 .2%.

Nearly 30%.

That means if you look around a room of four people, statistically, one of them will deal with this in their lifetime.

Or is currently dealing with it right now.

And there is a very significant gender gap in the data.

Women are 70 % more likely than men to be diagnosed with depression.

70%.

Why is that gap so huge?

Is it hormonal?

Is it societal?

Well, it's likely a mix of both of those things, but we also have to account for a massive diagnostic bias.

Men just present differently.

Men are much, much more likely to mask their depression with anger, irritability, or substance use.

Oh, there's a self -medicating.

Exactly.

If a man is drinking heavily every day, he might get diagnosed with a substance use disorder, but the underlying driver, the actual root cause, is often depression.

So the numbers might actually be a lot closer than they appear, but the presentation skews the official data.

That bleeds right into the next topic.

Comorbidity.

Basically, what else does the patient have going on?

Because the rule of thumb in the text seems to be that depression rarely travels alone.

It is very cliquey.

It absolutely loves company.

The psychiatric overlap with anxiety is massive.

The text notes something like 60 to 90 % of patients with depression also have an anxiety disorder.

60 to 90, that's almost everyone.

It's basically the standard presentation.

We call it anxious depression.

You also see really high comorbidity with schizophrenia, PTSD, substance use disorders, and personality disorders, particularly borderline personality disorder.

But it's not just psychiatric stuff, which I think is a trap students fall into.

The text spends a lot of time on medical comorbidity.

This is so crucial for you listeners who are planning to work in MedSurg or the ICU, not just on a psych floor.

Oh, this is where the holistic view is completely non -negotiable.

Depression is rampant in chronic illness.

If you have cancer, if you've had a stroke, if you have chronic pain or heart disease, your risk skyrockets.

I saw a stat in the notes here.

5 % to 60 % of hospitalized patients have depression.

That is a huge range.

But even the low end is significant.

And here is why that matters so much for the MedSurg nurse depression leads to worse medical outcomes, period.

If you have a heart attack and you are depressed, your recovery is objectively slower.

Your immune response is dampened.

Your compliance with your cardiac medication is lower.

And your hospital readmission rate is higher.

So treating the depression isn't just about making them feel happier.

It's literally about physically surviving the heart attack.

Exactly.

It's not all in their head.

It is a systemic issue.

Speaking of systemic issues, we have to talk about medication -induced depression.

I feel like this is a classic gotcha question on nursing exams and in actual practice.

You have a patient who suddenly seems really depressed.

And the very first thing you should do is check their med list.

Always check the chart first.

You need to know the usual culprits.

Cardiac medications like beta blockers can do it.

Steroids are notorious for causing wild mood swings and severe depression.

Birth control pills can induce it.

And even some antibiotics.

So before we even think about prescribing antidepressants or calling for a psych consult, we need to make sure we aren't actively causing the depression with another pill.

Right.

It's the core principle of rule out.

You have to rule out the medical and chemical causes first before you diagnose a primary psychiatric disorder.

Another overlap that the text highlights specifically is chronic pain.

This seems like a really vicious cycle.

It is a totally bi -directional relationship.

Pain makes you depressed, which is obvious, right?

Being in constant pain ruins your quality of life.

But biologically, depression actually makes you more sensitive to pain.

Really?

How does that work?

They share the exact same neurotransmitters, serotonin and norepinephrine, and the same anatomical brain pathways.

So if you treat the depression, often the physical pain gets better.

If you treat the pain, the depression gets better.

You cannot separate them.

Let's shift gears a little bit to the developmental or lifespan perspective, because depression looks very different at age seven than it does at age 70.

Drastically different.

And this is where assessment gets incredibly tricky for a nurse.

Let's start with the pediatric population, kids.

Well, children usually don't have the emotional vocabulary to look at you and say, I am experiencing anhedonia and existential dread.

Right.

They don't even say, I'm sad.

They act it out.

They get irritable.

They have massive temper tantrums.

They have somatic or physical complaints.

My tummy hurts.

My head hurts.

So the quiet withdrawn kid in the corner is one classic presentation.

But the angry disruptive kid throwing chairs might also be deeply depressed.

Absolutely.

And in adolescence, it often looks like chronic grouchiness.

They withdraw socially.

They get into trouble at school.

They might start experimenting with drugs or alcohol to cope.

It is so often mislabeled as just bad teen behavior when it is actually a severe mood disorder.

That's heartbreaking.

It is.

And the text notes a really scary stat here.

The relapse rate for children is incredibly high, 30 to 70%.

So if you have an episode as a kid, you are very, very likely to battle it again as an adult.

Yes.

What about the other end of the spectrum, the older adult?

This is a population where depression is tragically unrecognized and underdiagnosed.

There is this pervasive, awful myth, even among some doctors, that it is just normal to be sad when you get old.

Oh, his friends are passing away.

His hips hurt.

Of course he's depressed.

But that's just ageism, isn't it?

It's complete ageism.

Depression is never a normal part of aging.

But again, the presentation is often somatic.

They complain about their back aching, their digestion slowing down, feeling constantly fatigued.

They rarely talk about their feelings.

And then there is pseudo dementia.

Oh, this is such a fascinating concept in the chapter, fake dementia.

Yeah, it's depression masquerading as Alzheimer's disease.

The patient seems confused.

They're forgetful.

They're disoriented.

The family panics and thinks, oh, no, grandma has dementia.

But if you properly treat the underlying depression, the memory actually comes back.

That is wild to me.

How on earth do you tell the difference in a clinical setting?

It is hard.

But usually, with pseudo dementia, the onset of the confusion is much faster.

And the patient is highly distressed by their memory loss.

They'll say, I can't remember anything.

What's wrong with me?

In true dementia, the onset is gradual.

And they often try to hide the memory loss or confabulate stories to cover it up.

That's why the text strongly recommends using the geriatric depression scale specifically for this older population to tease that out.

Okay, let's move into section two of the chapter, etiology.

Basically the why.

We know it's a syndrome now, but what actually drives it?

Is it nature or is it nurture?

The answer inevitably in psychiatry is yes, it's both.

But let's break down the hardware first.

The genetics.

Twin studies are usually the gold standard here, right?

Right, and the text points out that if one identical twin has depression, there is about a 50 % concordance rate, meaning a 50 % chance the other twin will develop it too.

For fraternal twins, it's about 20%.

50 % is really high, but it's not 100%.

Exactly, that's the key takeaway.

If it were purely 100 % genetic, identical twins would always both have it.

So that tells us that the genes load the gun, but something else has to pull the trigger.

Even adoption studies confirm this.

How so?

Children of depressed biological parents remain at a much higher risk for depression even if they are adopted at birth into very happy, stable, non -depressed families.

That biological vulnerability travels with them no matter the environment.

Okay, let's talk about the chemical soup then.

The neurotransmitters.

You absolutely cannot pass a psych nursing exam without knowing the monoamane deficiency theory inside and out.

This is the bread and butter of psych pharmacology.

You need to know the big three, serotonin, norepinephrine, and dopamine.

Let's walk through them one by one.

If I am a patient and I am low on serotonin,

what does that actually look like?

Well, serotonin is your master regulator.

It manages your sleep, your appetite, and your libido.

When it's dysfunctional or low, your basic cycles are broken.

You can't sleep at all or you sleep way too much.

You have zero appetite or you binge eat.

You're irritable.

You have poor impulse control.

Okay, next is norepinephrine.

Think energy and focus for this one.

It modulates your attention and your behavior.

A deficiency here leads to a nergia, which is a total lack of physical energy, and anhedonia, which is the inability to feel pleasure.

It also severely hits concentration.

So these are the patients who tell you they can't even read a book anymore.

Exactly, they say they can't read a book or even follow the plot of a 30 -minute TV show because they just cannot track the information.

And what about dopamine?

Dopamine is the reward and incentive center.

When dopamine is down, you have absolutely no motivation.

You just don't care.

You don't care if you eat a good meal.

You don't care if you get a promotion at work.

The spark is just gone.

And there's physical observable proof of this in the chapter, right?

The text mentions PT scans.

Yes, if you have the book, look at figure 15 .1.

It compares a depressed brain to a non -depressed brain using a PETE scan.

The non -depressed recovered brain is lit up with warm colors, yellows, oranges, and reds showing high metabolic activity.

The depressed brain is almost entirely cool, blue, and purples.

It's quiet.

The brain activity is literally physically dampened.

Such a powerful image.

I can imagine showing that to a patient who thinks they're just being lazy.

Absolutely, it's incredibly validating.

You can say, look, your brain is physically underactive right now.

This is a physiological medical issue, not a character flaw.

But as we established, biology isn't destiny.

The text brings in the stress diathesis model next.

Yes, this is the crucial bridge between nature and nurture.

It's a biopsychosocial theory.

Diathesis is your genetic biological vulnerability or predisposition.

Stress is the environmental or interpersonal trauma you experience.

So how do they interact?

The mechanism the text describes is fascinating.

Early life trauma abuse, neglect, severe loss actually changes the physical architecture of the developing brain.

It permanently alters the CRF system and the norepinephrine systems.

Wait, so the childhood trauma physically changes the brain's hardware.

Yes, it makes the brain hypersensitive to stress later in life.

So imagine two adults who face the exact same stressful event, like a bad breakup.

The person with the sensitized brain from early trauma spirals into a deep clinical depression.

The person without that history might be very sad for a while, but their brain eventually bounces back.

That is profound.

And that leads us perfectly into the psychological theories in the chapter.

We really have to talk about Aaron Beck and cognitive theory.

Beck totally changed the game.

Before him, everyone in psychiatry was focused on unconscious drives and Freud.

Beck came along and said, no, it's what you are consciously thinking right now.

His core premise is simple.

What you think equals what you feel.

If you think negative thoughts, you will feel depressed.

And he identified something called the cognitive triad.

Right, three core negative beliefs.

One,

a negative view of the self.

I am broken, I am worthless.

Two, a pessimistic view of the world.

The world is cruel and demanding.

And three,

the belief that this negative reinforcement will continue forever, it will never get better.

Hopelessness.

And the scary part the text points out is that these thoughts are automatic.

Automatic negative thoughts.

They pop up totally uninvited and they are fueled by cognitive distortions.

The text actually lists these out beautifully in box 15 .2 and I think every single listener will recognize at least one they've used themselves.

Oh, for sure.

The first one is all or nothing thinking.

If I don't get an A on this nursing exam, I am a total failure and I shouldn't even be a nurse.

Yeah, we've all been there.

What about overgeneralization?

I messed up this one IV insertion so I will always be terrible at clinical skills.

Then there's catastrophizing.

That's expecting total disaster.

My patient's blood pressure is slightly elevated.

They are definitely gonna stroke out on my shift.

And personalization.

The charge nurse didn't say hi to me this morning so she must hate me.

The goal of cognitive behavioral therapy or CBP is to catch these specific thoughts, right?

Yes, the technique is called reframing.

You learn to stop the automatic thought, examine the actual evidence for it, and replace it with a more realistic, balanced thought.

It's incredibly effective, but it takes a lot of active work from the patient.

There's one last theory the text mentions.

Learned helplessness by Martin Seligman.

This explains why people who are trapped in chronic, difficult situations eventually just stop trying to improve things.

Seligman did these experiments which were honestly kind of mean with dogs.

If you shock a dog and give it absolutely no way to escape, eventually the dog just stops trying.

Even if you open the door to the cage later, the dog will just lay there and take the shock.

That is heartbreaking.

It is terrible, but it applies directly to humans.

If you feel you have absolutely no agency or control, maybe due to generational poverty, abusive relationships, or systemic oppression,

your anxiety eventually gives way to depression.

You fundamentally believe that nothing you do matters, so you stop doing anything.

Okay, let's get clinical now.

We're moving into section three, clinical picture and diagnoses.

How do we officially label what we are seeing?

Well, for major depressive disorder, or MDD, the baseline criteria is that you need persistent sadness and a loss of interest that lasts for at least two weeks.

But for nursing students, you absolutely need to memorize the mnemonic SIG -E -CAP -E -CIP.

SIG -E -CAP -ES, let's break that down letter by letter.

S is for sleep disturbance.

Usually this means insomnia, and specifically waking up early in the morning and not being able to fall back asleep.

But it can also be hypersomnia, sleeping too much.

I is for interest diminished.

That is the clinical term anhedonia we talked about.

G is for guilt or profound feelings of worthlessness,

ruminating on past failings.

I am a burden to my family.

E is for energy decreased, energy, just no gas in the tank.

C is for concentration diminished.

They can't focus or make simple decisions.

A is for appetite changes.

Usually this is significant weight loss and severe depression, but it can be weight gain and atypical depression.

P is for psychomotor retardation, where everything is slowed down or psychomotor agitation, where they are pacing and restless.

And the final S?

The big one.

S is for suicidal thoughts or ideation.

SIG -E -CAP -ES, if you know that, you know the diagnosis.

But how is MDD different from persistent depressive disorder, which the text also calls dysthymia?

Think of PDD or dysthymia as the EOR presentation from Winnie the Pooh.

It's highly chronic.

To get this specific diagnosis, you have to have had symptoms for at least two years.

Two entire years is a really long time to feel low.

It's exhausting.

These patients will often tell you, I've just always been this way.

It's usually less severe day to day than MDD, like they can often hold down a job, they can function socially, but they are dragging a heavy anchor behind them everywhere they go.

They are chronically fatigued, irritable, pessimistic, and have very low self -esteem.

The text also lists a few other specific disorders pretty quickly.

Right.

There's disruptive mood dysregulation disorder or DMDD.

This diagnosis was actually created relatively recently to stop clinicians from over -diagnosing so many children with bipolar disorder.

It's specifically for kids with severe chronic irritability and massive anger outbursts.

And then premenstrual distort disorder, PMDD.

This involves severe depression, irritability, and anxiety that clusters specifically in the week before menses.

It is distinct from normal PMS because the severity actually disrupts the person's work or social functioning.

Okay.

We are into section four now, the nursing process assessment.

You are the nurse.

You are walking into the patient's room.

What is your absolute priority one?

Safety.

Always, always safety.

You are assessing for suicide risk immediately.

The stats the book gives here are grim.

Suicide is a 10th leading cause of death and men complete suicide four times more often than women.

That's a crucial clinical distinction.

Women attempt suicide more often, but men complete it more often.

And that's because men tend to use much more highly lethal means like firearms, whereas women might use pills.

So how do we actually ask the question?

I feel like students get so nervous here during clinicals, they feel like they don't wanna put the idea in the patient's head.

That is a huge myth and the textbook specifically calls it out.

Asking about suicide does not cause suicide.

You have to be direct.

You do not say, are you feeling like you might do something silly?

Right, no euphemisms, no beating around the bush.

Exactly.

You look them in the eye and you ask clearly, are you thinking about killing yourself?

And if they say yes, what is your immediate next move?

You need to assess three specific things.

Plan, means, and lethality.

Walk us through this.

First, plan.

Do they have a specific way they would do it?

Have they thought out the details?

Second, means.

Do they actually have access to the method?

Do they have the pills hoarded?

Do they have the gun at home?

And third, lethality.

How deadly is the plan?

Taking a bottle of Tylenol is lethal, but it's relatively slow and we can intervene.

A gunshot is immediate.

If they have a highly lethal plan and the means to carry it out right now, that is an immediate psychiatric emergency.

You do not leave that patient alone.

What about homicidal ideations?

Is that part of it?

Yes, you have to ask that too.

Do you have thoughts of hurting the person who upset you?

Because often, the person they desperately wanna hurt is the person they blame for all their pain.

To help with this, the text mentions several standardized assessment tools.

Yes, you'll see the PHQ -9 used heavily in primary care settings.

It's very quick.

In psych settings, you might see the Hamilton Depression Rating Scale to measure severity, the Geriatric Depression Scale for older adults, and the Edinburgh Postnatal Depression Scale for postpartum moms.

Let's talk about the detailed physical assessment findings.

We mentioned vegetative signs earlier.

What exactly does that mean?

It refers to the physical body shutting down.

So beyond just the emotions.

Right, it's the physical manifestation.

Energia is huge.

97 % of depressed patients have this total lack of energy.

Then there's psychomotor retardation.

What does that look like in the room?

It is fascinating and sad to watch.

It's like they are moving through thick molasses.

Their speech is incredibly slow.

Their reaction time is delayed.

In very severe cases, they might not even have the energy to get up to go to the bathroom.

So they actually become incontinent.

Wow.

And their physical appearance.

Grooming totally falls apart.

They neglect their hygiene.

They stop showering.

They stop brushing their hair.

They present with a very shabby or disheveled appearance.

And what about their digestion?

Constipation is incredibly common.

Just like their movements slow down, their GI tract slows down.

Plus, they aren't drinking water or eating fiber.

So put yourself in this scenario.

You're in the room with this patient.

They are severely withdrawn.

Maybe they are totally mute.

They are just staring at the blank wall.

This is a very, very awkward moment for a student nurse.

Your instinct is you want to jump in and cheer them up.

And according to the communication guidelines in table 15 .2, that is the absolute worst thing you can do.

Why is that so bad?

It comes from a good place.

Because it completely invalidates their current reality.

If you walk in and say, oh, look at the sun.

It's a beautiful day outside.

Things will look up soon.

You are telling them that their profound internal suffering is wrong or invisible.

It shuts down communication instantly.

So what do you do with the mute withdrawn patient?

The text has a great vignette about a student named Doris who just sat there with her patient.

Yes.

The technique is called making observations.

Instead of asking a direct question that requires an answer, which is really hard work for a slowed down depressed brain, you just simply state what you observe in reality.

Give us an example.

You sit down and say, I see you are wearing your new shoes today, or there are new pictures up on your bulletin board.

It sounds, I don't know, almost too simple.

It does sound simple, but it is incredibly powerful.

It says to the patient, I see you.

I am here with you.

I am paying attention to you.

It grounds them in reality and validates their existence without demanding anything from them in return.

And you have to allow time.

So sitting in silence is OK.

Silence is deeply therapeutic.

And when you do speak, use very simple, concrete words.

Their processing speed is severely slowed.

If you ask a complex, multi -part question, they will just tune you out.

You have to give them minutes, not seconds, to formulate a response.

Let's move to section five.

Implementation, the actual doing part of the nursing process.

How do we take care of these basic physical needs?

Let's talk about food first.

If a patient has severe anorexia from their depression, do not bring them a giant, heaping tray of food from the cafeteria.

It is way too overwhelming.

They will look at it, feel defeated, and just give up.

So what's a better strategy?

Small, frequent, high -calorie, high -protein snacks.

Hand them a protein shake.

Hand them a cheese stick.

And importantly, sit with them while they eat.

Your presence can gently encourage them to take a bite.

What about sleep interventions?

This is a constant battle on the unit.

You have to keep them out of bed during the day.

If they sleep all day, they will be up all night ruminating, and the cycle just continues.

It's really hard because they desperately wanna retreat to their bed, but you have to establish a strict routine.

So no naps.

No daytime naps.

Decaf coffee only.

And relaxation routines at night.

Warm milk, soft music, dim lights.

And for the self -care deficits.

The patient who maybe just stands in the shower or doesn't actually wash themselves.

You have to break the task down for them.

Their executive function is impaired right now.

You can't just say, go get washed up.

You have to give step -by -step reminders.

You say, here's the washcloth, put the soap on it, good.

Now wash the right side of your face, now the left.

You are literally lending them your executive function until theirs comes back online.

Okay, take a deep breath.

We are moving into section six,

pharmacological therapies.

This is the heavy lifting of the chapter.

This is where students almost always struggle because there are so many drug classes to memorize.

We can simplify this, but first we need to establish the golden rule of psych meds.

Start low, go slow, especially in the elderly population.

And you must understand the black box warning.

Yes, let's unpack that black box warning.

It states that antidepressants actually increase the risk of suicidal thinking in children, adolescents, and young adults.

That seems completely counterintuitive to a lot of people.

It's terrifying, but it's due to what we call the energy gap.

When you start an antidepressant, the physical energy often returns weeks before the mood actually improves.

Oh wow.

Right.

So for the first couple weeks, the patient is still feeling deeply depressed and hopeless, but now they finally have the physical energy to carry out the suicide plan they've been ruminating on.

That is truly terrifying.

It is, that's exactly why the first few weeks of pharmacological treatment are the most dangerous.

You have to monitor them like a hawk during that window.

Okay, let's look at the specific drug classes.

First line of defense,

the SSRIs.

Selective serotonin reuptake inhibitors.

This includes your fluoxetine, which is Prozac, sertraline, which is Zoloft, and acetalpram lexapro.

Their mechanism is that they block the reuptake of serotonin, leaving more of it available in the synaptic cleft.

Why are these the go -to first line?

Because they are incredibly safe compared to older drugs.

It's very, very hard to accidentally or intentionally kill yourself with an overdose of Prozac, and they have far fewer anticholinergic side effects.

But they aren't perfect, obviously.

No, they have drawbacks.

The biggest complaint by far is sexual dysfunction, loss of libido, inability to achieve orgasm.

This is actually the number one reason patients abruptly stop taking them.

They can also cause initial agitation, sleep disturbances, and GI upset.

And there is a rare but very dangerous adverse event associated with them, serotonin syndrome.

Yes, this happens if you have too much serotonin in the system.

Maybe the dose is too high, or maybe the patient mixed their SSRI with something over -the -counter like St.

John's wort.

You need to remember the mnemonic shivers.

Shivers, walk us through it.

S is for shivering.

H is for hyperreflexia, so very twitchy, rigid muscles.

I is for increased temperature, meaning a high fever.

V is for vital sign instability.

Their heart rate and blood pressure will be all over the place.

E is for encephalopathy, which just means severe confusion or delirium.

R is for restlessness, and S is for sweating.

If a nurse sees shivers in a patient, what do they do?

You stop the drug immediately.

You call the provider right away.

This is a true medical emergency.

They will need cooling blankets and muscle relaxants.

Got it.

Next class.

The TCAs, tricyclic antidepressants.

These are kind of the dinosaurs of psych meds, right?

Yeah, older drugs, amitriptyline, imipramine, they work really well for depression, but they are dirty drugs.

Dirty meaning what?

Meaning they don't just target serotonin and norepinephrine, they accidentally hit acetylcholine and histamine receptors too.

Which means a ton of side effects.

Exactly, the classic anticholinergic side effects.

The saying is can't see, can't pee, can't spit, can't have a bowel movement.

Dry mouth, blurred vision, urinary retention, severe constipation, and they cause heavy sedation so you always give them at night.

They also cause orthostatic hypotension, making them a huge fall risk for the elderly.

But the real danger with TCAs is the heart, right?

Yes, cardio toxicity.

They slow the electrical conduction in the heart.

They can cause fatal dysrhythmias.

And because of that, they are highly lethal in overdose.

If you give a severely suicidal patient a 30 day supply of a TCA, you have essentially just handed them a loaded weapon.

Assessing suicide risk is hypercritical before prescribing these.

Let's move to the MAOIs, monoamine oxidase inhibitors.

These seem incredibly high maintenance.

They are very high maintenance.

Drugs like phenylzine or tranylsipramine, their mechanism is that they inhibit the enzyme that naturally breaks down monoamines in the body.

They are very powerful, but they are strictly second line used for unconventional or resistant depression.

Because of the big risk.

Right, the risk is hypertensive crisis and the cause of that crisis is an amino acid called tiramine.

So the patient has to follow a very strict diet.

Table 15 .7 covers this.

What is on the do not eat list for a patient on an MAOI?

Basically anything aged, fermented, smoked or pickled.

No aged cheeses, so no cheddar, no brie, no smoked meats, so no salami, no pepperoni, no avocados, no figs, no yeast extract, no tap beers and no red wine.

So basically no charcuterie boards and no pizza parties.

Exactly.

If they consume tiramine while on this drug, their blood pressure absolutely skyrockets.

They'll get a severe headache, a stiff neck, palpitations, it can easily lead to a fatal stroke.

And drug interactions are just as bad.

You can never ever mix MAOIs with SSRIs due to serotonin syndrome risk or even with over -the -counter cold medicines like pseudoephedrine.

If you are switching a patient from an SSRI to an MAOI, you must have a two to five week washout period where they take nothing.

Finally, let's cover the atypical or dual action antidepressants.

Bopropion is a big one, brand name Welbutrin.

This is an NDRI, it works on norepinephrine and dopamine.

Why do people like this one?

The good news is it has absolutely no sexual side effects and it actually helps people quit smoking.

The bad news is it lowers the seizure threshold.

So you absolutely cannot give this to someone with a history of seizures, a traumatic brain injury, or someone with an eating disorder like bulimia because their electrolyte imbalances already put them at risk for seizures.

Makes sense.

Then there is Mirtazapine or Remeron.

The profile on Mirtazapine is very specific.

It makes you very sleepy and it makes you very hungry.

So the perfect use case is the frail elderly patient who isn't sleeping at night and is rapidly losing weight.

It solves all three problems at once.

And Trazodone.

Trazodone is mostly used just for sleep nowadays because it's so heavily sedating.

But you have to heavily warn male patients about a rare side effect called priapism, which is a painful, prolonged erection that actually requires an emergency trip to the ER to fix.

There's a relatively new player mentioned in the text too, ketamine, specifically esketamine.

Yes, it's administered as a nasal spray and it works entirely differently.

It works on glutamate via NMDA receptors rather than serotonin.

What's the main benefit there?

Speed.

It works fast.

We are talking hours not weeks.

It is primarily used for highly treatment resistant depression or acute suicidality.

It acts as a rapid bridge to keep them safe until their oral SSRIs finally kick in.

Okay, we're moving to section seven.

Brain stimulation and integrative therapies.

When the pills just don't work, what are the options?

The heavy hitter is electroconvulsive therapy or ECT.

I feel like this treatment has such a massive stigma attached to it, mostly from old movies like One Flew Over the Cuckoo's Nest.

It really does, but modern ECT is absolutely nothing like that movie.

It is highly, highly effective.

We see 70 to 90 % remission rates.

It is the gold standard for treatment resistant depression,

acute suicidality or life threatening situations where you simply cannot wait four weeks for a pill to work like a patient who is severely catatonic and literally starving to death.

Walk us through the modern procedure so students know what to tell their patients.

Sure.

The patient is put under light general anesthesia.

They are given a muscle relaxant called sithinolcholine.

This ensures they don't actually physically convulse and break any bones.

Then we use electrodes to induce a very controlled brief seizure in the brain that lasts about 30 to 60 seconds.

And what are the side effects the nurse should look out for?

When the patient wakes up in the recovery room, they will be very confused for a little while and they will experience short -term memory loss.

They might ask, what did I have for breakfast today?

Or how did I get to this hospital?

It usually resolves over time, but some memory gaps can be permanent.

There are some non -seizure stimulation options mentioned as well.

Right, there's TMS transcranial magnetic stimulation.

This uses an MRI strength magnetic coil placed right on the scalp.

There's no anesthesia, no seizure.

You literally go in, sit in a comfortable chair, get tapped on the head by a magnet for 30 minutes, and then you can drive yourself right back to work.

But you have to do it every single day for four to six weeks.

The main side effect is just a mild headache or scalp discomfort.

And VNS, vagus nerve stimulation.

Think of VNS like a pacemaker, but for the brain.

A small device is surgically implanted in the chest and a wire is wrapped around the vagus nerve in the neck.

It sends a pulse every five minutes or so to boost neurotransmitters.

It's meant for very long -term chronic depression.

Let's briefly touch on complementary and integrative therapies,

because not everything comes from a pharmacy.

A light therapy is a great example.

It's the absolute first -line treatment for seasonal affective disorder, or SAD.

You sit in front of a 10 ,000 lux light box for 30 to 60 minutes every morning.

The intense light suppresses your melatonin production and basically tricks your brain into thinking it's a bright spring day.

What about St.

John's wort?

I feel like patients love this one because it's sold over the counter and it's natural.

Oh, they do, but natural does not mean safe.

It's a plant product that actually increases serotonin.

So if a patient takes it alongside their prescribed Prozac, they are at a huge risk for serotonin syndrome.

Also, it heavily affects the liver's metabolism of other drugs, often making them process too fast and become completely ineffective.

So it could make, say, their birth control pill stop working.

Exactly.

That is a massive health teaching point for the nurse.

You have to ask about over -the -counter supplements.

And lastly,

exercise.

Exercise is medicine.

It naturally increases the availability of serotonin and endorphins.

Studies show that for mild depression, a solid exercise routine is actually just as effective as taking an SSRI.

We are in the home stretch now.

Section eight, evaluation and nurse self -care.

Evaluation in the nursing process is constant.

You are perpetually reassessing suicide risk.

And a big tip.

Look for physical improvements first.

Are they sleeping a little better?

Are they eating half their tray now instead of none of it?

Are they brushing their hair?

The physical signs improve long before the subjective mood actually lifts.

But we also have to look at the nurse in this section.

This is really heavy, emotionally taxing work.

Dealing with profound hopelessness all day, every day takes a massive toll on you.

It absolutely does.

The text talks about the risk of the contagion of depression.

Not that you physically catch it like a cold virus, but you catch the heavy feeling of helplessness.

You start thinking to yourself, nothing we do helps these people, they just keep coming back.

And they warn about the rescue fantasy.

Yes, this is a very dangerous mindset for a new nurse.

It's the unrealistic belief that I, and I alone, can save this patient with my amazing care.

When you inevitably can't, because no one can save everyone, you crash hard, you burn out, you become cynical, and you withdraw from your patients.

You have to have peer support.

You have to talk about your feelings with your colleagues.

That brings us right to our outro.

We have to distill this entire massive chapter down.

It's that depression is a whole person, systemic illness.

It is deeply biological.

It's about neurotransmitters and altered brain structure.

It's psychological, driven by cognitive distortions and trauma.

And it's social.

You need the pharmacology to fix the hardware, absolutely.

But you desperately need the nursing care, the presence, the active listening, the safety planning to support the human being.

And I want to leave you, our listeners, with a final provocative thought from the text, something to really chew on before your exam.

We spend so much of nursing school learning what to say to patients.

We memorize communication techniques.

We memorize scripts.

We practice our therapeutic responses.

But the text suggests that your most powerful, most therapeutic tool might actually be your ability to say absolutely nothing, to just sit there in the room, to bear witness to someone's profound suffering without instantly rushing to put a verbal band -aid on it or try to fix it.

That right there, that is the true art of psychiatric nursing.

They call it the ministry of presence.

It's incredibly profound.

It really is.

Sometimes just being there is the intervention.

Well, that officially wraps up our deep dive into chapter 15.

This was an absolute marathon, but we really hope going through it step -by -step like this helps you master this critical material.

A huge, warm thank you from the whole Last Minute Lecture team.

Good luck with your exams.

Stay curious and keep digging deep.

Take care, everyone.

You're gonna do great.