Chapter 7: Drug Therapy & Safety in Older Adults

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Welcome back to the Deep Dive.

I have to be honest with you, the numbers we are looking at today are the kind of statistics that really keep you up at night.

They really are.

I was looking at the demographic charts just before we hit record.

Well, title wave feels like an understatement.

It really does.

In public health circles, they actually call it the silver tsunami.

The silver tsunami.

And it's a metaphor that fits perfectly because it represents a total restructuring of the landscape.

It's massive.

Just to ground everyone in the reality of this, our source material chapter seven of pharmacology,

a patient -centered nursing process approach,

lays out the timeline.

By 2030,

every single baby boomer will be older than 65.

That is just around the corner.

I mean, we're practically there.

We are.

And if you project just a little further down the road, say to 2050,

we're expecting over 82 million older adults in the United States alone.

But here is the thing that we need to really unpack today.

And this is the core of it all.

This isn't just a census issue.

It's not just about counting heads.

It is a biological issue.

Right.

Because treating an 82 -year -old is not the same as treating a 40 -year -old.

It is not even in the same universe.

That is our mission for this deep dive.

We are taking chapter seven and we are going to dismantle it.

We need to create the ultimate audio guide for nursing students or really anyone interested in medicine to understand why the standard approach to medicine can actually be dangerous or even fatal when you apply it to this demographic.

It's so true.

We are talking about the graying of America and specifically the pharmacology of aging.

And the stakes are incredibly high.

The source material highlights a really

staggering statistic regarding chronic illness.

We aren't talking about healthy aging for the most part.

We are talking about complex management.

Right.

The text says 92 % of older adults have at least one chronic illness.

92%.

That is, I mean, that's effectively everyone.

Essentially.

And 75 % have at least two.

So when you walk into a room as a nurse, you aren't just treating hypertension.

You are treating hypertension in a patient who also has diabetes, probably some osteoarthritis, maybe early stage heart failure, and almost certainly some reflux issues.

Which brings us to the inevitable result of all that complexity, right?

This year, volume of pills.

Polypharmacy.

Exactly.

If you have two or more chronic conditions, you are typically taking five or more prescription drugs.

Five or more.

And that doesn't even count the over -the -counter stuff.

The vitamins, the herbal supplements, or the ibuprofen they take for their knees.

It is a chemical cocktail.

And that cocktail is landing in a physiological system that is effectively, well, wearing out.

So before we get into the specific drugs, and we will get into the specific drugs, we have to talk about the machine itself, the human body.

What is actually happening to the hardware as we age?

We call this physiologic decline.

And for a nurse or a prescriber, the most dangerous mindset you can have is to think of an older adult as just a standard adult who is a little wrinkled.

The internal machinery, the engines of absorption, distribution, metabolism, and excretion, they're all running at a different pace.

The text mentions a mantra for this.

A golden rule of geriatric pharmacology.

Yes.

And if you take nothing else away from this deep dive, tattoo this on your brain.

Start low and go slow.

Start low and go slow.

It sounds almost cliche, but reading through the chapter, I get the sense this rule is written in blood.

It is.

Because the therapeutic range, that safe zone where a drug works without hurting you, it shrinks dramatically.

So the margin for error just vanishes.

It does.

A dose of a sedative that would make a 30 -year -old feel just a little relaxed could put an 80 -year -old into a coma.

You have to start at the absolute bottom of the dosing range and inch your way up, watching their reaction like a hawk.

So let's break down why that sensitivity exists.

The source material organizes this by the four pillars of pharmacokinetics.

Absorption, distribution, metabolism, and excretion.

ADME, yep.

But before we get to the ADME process, let's talk about the general decline.

The big picture.

Think of the body as maintaining a delicate equilibrium.

We call it homeostasis.

When you are young, you have a lot of reserve capacity.

A huge buffer.

If I give you a drug that drops your blood pressure, your body has strong snappy reflexes to compensate so you don't pass out.

But as we age, that reserve capacity, it just dries up.

Exactly.

We see a reduction in total body water.

We see a reduction in lean muscle mass.

And at the very same time, body fat increases.

The kidneys shrink.

The liver shrinks.

The blood flow to those organs slows down.

The buffer is gone.

It really does sound like the margin for error just completely disappears.

It does.

Which leads directly to adverse effects.

Can we look at some concrete examples of this?

Because the text lists some specific consequences that seem like they would be incredibly common in a hospital setting.

Absolutely.

Take antihypertensives, blood pressure meds.

In a young person, the baroreceptors, those are the little pressure sensors in your arteries, they tell the heart to speed up immediately if pressure drops too low.

Like a thermostat.

A very fast thermostat.

In an older adult, those receptors are blunted.

They are slow to react.

So you give them a standard dose of a beta blocker, they stand up to go to the bathroom.

And gravity wins.

Gravity wins.

Postural hypotension.

Their blood pressure bottoms out, the heart doesn't compensate fast enough, and they fall.

And a fall is not just a fall for an 80 -year -old.

No.

A hip fracture in an 80 -year -old is a life -altering, often life -ending event, all because the compensatory mechanism failed.

Okay, what about something like diuretics?

The water pills.

Same issue.

An older adult already has less total body water.

Their tank is, let's say, half full to start with.

If you hit them with a strong diuretic like furosemide, you can push them into severe dehydration and electrolyte imbalance much, much faster than a younger person.

And I'm guessing anticoagulants are even riskier.

Blood thinners like Warfarin.

Oh, definitely.

The aging vascular system is more fragile, and the clotting factors might be synthesized differently in an aging liver.

The risk of a major bleed intracranial or gastrointestinal is significantly higher.

What about anti -diabetics?

You see an altered glycemic response.

Their blood sugar might crash more unpredictably because their body just can't mobilize glucose stores as quickly to recover.

And even something as common as NSAI, it's like ibuprofen, you see that everywhere.

A much higher risk of GI irritation and bleeding.

See, these aren't just side effects in the traditional sense.

These are the direct consequences of a physiological system that can no longer buffer the impact of these chemicals.

That is a really helpful way to frame it.

It's not that the drug is stronger.

It's that the body's ability to handle the impact is weaker.

It's a completely altered risk -benefit analysis.

Precisely.

You've got it.

Okay, let's get into the weeds then.

We are going to walk through the pharmacokinetics step by step.

So step one of the journey, absorption.

The drug has to get into the system.

Right.

And usually we are talking about oral medication here, swallowing a pill.

The gut undergoes some pretty significant changes.

Like what?

Well, the surface area of the small intestine, think of it as this huge absorptive tennis court, it actually decreases.

The villi, the little fingers that grab nutrients, they get shorter.

And everything slows down, I assume.

Everything slows down.

Gastric emptying slows.

Peristalsis, that's the squeezing movement of the gut, it slows down.

And blood flow to the stomach can drop by 40 % to 50%.

40 % to 50%.

So does that mean drugs just don't get absorbed?

Surprisingly for most drugs,

the total amount absorbed doesn't change that much.

It just takes longer.

The onset of action might be delayed, you know?

Okay.

But there is one specific chemical change in the stomach that is clinically huge,

gastric acid.

The pH level.

Right.

As we age, the stomach produces less hydrochloric acid.

We become more alkaline.

Some sources say acid production drops by 5 to 10%.

Others suggest it's even more significant depending on the patient's health, maybe from other meds they're on.

Why does that matter for a pill?

How does acidity affect it?

Because some drugs absolutely require an acidic environment to dissolve.

If the stomach isn't acidic enough, the pill stays a rock.

It just, you know, passes right through the system, unobsorbed.

The source material highlights calcium specifically here.

This feels like a major nurse tip.

Oh, it is.

It's a classic board exam question and a real -life issue.

Older adults are often told to take calcium for bone health, right?

For osteoporosis prevention.

Right.

It's incredibly common.

You see it on every med list.

The cheapest, most common form is calcium carbonate.

It's basically chalk, tums.

But chemically, calcium carbonate requires acid to break down.

So if you give calcium carbonate to an 85 -year -old with low stomach acid production...

They aren't absorbing it.

It's effectively useless.

That is why the guidelines suggest calcium citrate for older adults.

Calcium citrate.

Yes.

The citrate form is acidity independent.

It dissolves just fine in a low acid environment.

That is such a subtle nuance, but if you miss it, you're essentially treating a patient with a placebo.

Exactly.

And it's not just the chemistry, right?

We have to think about the mechanics of the input as well.

Dysphagia difficulty swallowing is huge in this population, especially post -stroke or with conditions like Parkinson's disease.

So nurses end up crushing pills.

Which opens a whole other Pandora's box.

You cannot crush everything.

Enteric -coated pills, slow -release formulations.

If you crush a slow -release cardiac med, you are dumping 24 hours of medication into their system in 24 seconds.

That is lethal.

That kills people.

So you always, always have to check if a medication is crushable.

So absorption isn't just, did they swallow it?

Can they dissolve it?

Can they absorb it?

Did we destroy the delivery mechanism by crushing it?

Correct.

Now let's assume the drug successfully made it into the blood.

Now we are in phase two, distribution.

This is where that body composition shift really comes into play.

You mentioned it earlier.

Less muscle, less water, more fat.

It's a dramatic shift.

In older adults, body fat can increase by 20 % to 40%.

Even if they look thin on the outside, the ratio of lean mass to adipose tissue shifts significantly.

So how does that extra fat affect a drug?

It depends on whether the drug is lipophilic fat -loving or hydrophilic water -loving.

Let's talk about the fat -loving drugs first.

Things like diazepam valium are many antipsychotics.

They are lipophilic.

They are attracted to the fat stores.

They get sucked up into the fat tissue like a sponge.

The fat acts as this massive reservoir.

So you give a dose and instead of staying in the blood where it can be cleared out by the liver and kidneys, it hides away in the fat.

And then what?

It just slowly leaks back out.

Exactly.

It trickles back into the bloodstream over a long, long period.

This increases what we call the volume of distribution.

It effectively extends the half -life of the drug.

So a sedative that should wear off in eight hours might make an older adult groggy and confused for 30 hours because it keeps leeching out of their fat stores.

That explains the hangover effect we see in older patients with sleeping pills.

They're still feeling it the next day or even the day after.

It's exactly that.

Now flip the script.

Let's talk about water -soluble drugs.

Think about ethanol, alcohol, or lithium.

Since older adults have less total body water.

There's a smaller tank to dilute the drug in.

Okay.

Think about it this way.

If you put a drop of red dye in a swimming pool, it's faint.

Put that same drop in a shot glass and it's intensely colored.

That's a great analogy.

Because older adults have 10 to 15 percent less body water, water -soluble drugs hit much higher peak concentrations.

So the risk of immediate toxicity is higher.

Much higher.

But there is a third player in distribution that we absolutely cannot ignore.

Albumin.

That's a protein in the blood.

I always think of it as a transport vehicle like a taxi.

That's a perfect analogy.

Think of albumin as a taxi.

Many drugs are designed to ride in the taxi.

They bind to the protein.

While they are bound up, they are inactive.

They are just circulating.

They are safe.

They only work when they get out of the taxi, when they're free.

Right.

The free drug is the active drug.

Now here is the problem.

As we age, the liver produces less albumin.

Albumin levels drop sometimes by 10 percent or more.

And if the patient is malnourished, which many are, it drops even further.

So you have fewer taxis on the road.

Fewer taxis means more passengers are left standing on the curb.

You have more free drugs circulating in the system, unbound and active.

So even if you give the standard dose, the effective dose is wildly high because there is nothing to bind it and keep it in reserve.

Exactly.

Phenytoin elantin, a seizure med, is a classic example.

It's highly protein bound.

If you give a normal dose to an older adult with low albumin, the free phenytoin levels can skyrocket and you get toxicity confusion, ataxia, nystagmus, all the signs.

It seems like every single one of these mechanisms is conspiring to increase the drug level.

Fat holds it longer.

Water concentrates it more.

Low protein leaves it unbound and active.

That is the takeaway.

The default setting of the aging body is to amplify the drug's presence and its effect.

Which puts a huge pressure on the next two stages.

Yeah.

Getting rid of it.

Let's talk about metabolism.

The liver.

The liver is the chemical processing plant.

Its job is to biotransform drugs to break them down so they can be excreted by the kidneys.

And like everything else, the plant is downsizing.

Dramatically.

Hepatic blood flow, the blood supply to the liver decreases by a massive 40 percent.

40 percent.

And the liver itself shrinks in volume by 15 percent to 30 percent.

It's just physically smaller and it's getting fewer resources delivered to it.

The text mentions the CYP450 system.

That sounds like a sci -fi robot.

It does sound like a droid, doesn't it?

The cytochrome P450 enzyme system.

It's a family of enzymes responsible for metabolizing a huge percentage of the drugs we use.

In older adults, the activity of these enzymes, specifically CYP1A2 and CYP2C9, can be reduced.

So the assembly line that breaks down the drug is just moving slower.

Much slower.

And this leads to a reduction in what we call the first pass effect.

Explain that for us.

What is the first pass effect?

Okay.

So when you swallow a pill, it gets absorbed from the gut, goes through the portal vein, and its first stop is the liver before it goes to the rest of the body.

Right.

The liver usually takes a big bite out of the drug right then and there.

It metabolizes a chunk of it before it ever has a chance to work.

That's the first pass.

So if you take 100 milligrams of a drug, maybe only 50 milligrams actually survives the liver to enter general circulation.

In a young, healthy person, yes, that's a good example.

But if the older liver is sluggish and its blood flow is reduced, it might only metabolize 20 milligrams on that first pass.

It lets 80 milligrams through.

So again, the patient is getting a higher effective dose than the prescriber intended.

Yes.

The bioavailability is higher and the half -life extends.

The drug lingers.

But here is the most dangerous trap with the liver, and I want every nurse listening to really hear this.

You cannot trust the lab tests.

Wait, what?

You can't trust the ALT and AST.

Those are the standard liver function tests.

You can trust that the number on the report is accurate, but you cannot trust what it means in an older adult.

How so?

In a young person, if the liver is damaged, it spills out enzymes and the levels go up.

It's a clear signal.

But an older liver is smaller and has less regenerative capacity.

It might not release a big spike of enzymes even if it's failing.

So you could have a patient with normal AST and ALT levels who actually has significant hepatic impairment.

Absolutely.

It happens all the time.

Normal labs do not rule out liver dysfunction in the elderly.

You have to treat the patient, not the number.

If they look toxic, they are toxic, even if the chart says the liver is fine.

That is genuinely terrifying.

It removes one of our main safety gauges.

It forces you to use your clinical judgment, your eyes, your ears, not just check a box on a lab report.

Okay, moving to the final exit strategy.

Excretion, the kidneys.

This is arguably the most critical section for drug dosing in older adults.

The kidneys are the filter.

They pull the drug and its metabolites out of the blood and dump them into the urine to be removed.

And the decline here is predictable and relentless, isn't it?

It is.

The glomerular filtration rate, the GFR, which is the best measure of kidney function, drops by about one milliliter per minute per year after age 40.

So just do the math.

If you are 80 years old, you've lost 40 years of function compared to your peak.

You've lost at least 40 mlm of filtration capacity.

Exactly.

A healthy 30 -year -old might have a GFR of 120 mlm.

An 80 -year -old might be running at 60 or 70, even without having diagnosed kidney disease.

It's just normal aging.

And this brings us to another clinical paradox.

Just like the litter enzymes, the creatinine paradox.

We rely on serum creatinine to check kidney function.

We do.

Creatinine is a waste product of muscle metabolism.

If the kidneys are working well, they filter it out.

If they aren't, creatinine builds up in the blood.

So high creatinine equals bad kidneys.

That's the rule of thumb we're all taught.

But older adults have less muscle mass.

Bingo.

Less muscle means less creatinine production to begin with.

So an older adult might have a serum creatinine of 0 .9 ml of GDL which looks totally normal on a lab report, but their GFR might be terrible.

The low production masks the low excretion.

It's a false negative.

The lab looks fine, but the kidneys are not.

It is.

That is why we never ever dose based on serum creatinine alone in geriatrics.

We have to calculate the creatinine clearance or the GFR.

The text gives us the Kokrov -Gault formula.

I know we have apps and online calculators for this now, but let's walk through the variables so we understand the logic behind it.

It's so important to understand the math behind the screen.

The formula is 140 minus age times weight in kilograms divided by 72 times the serum creatinine.

And if the patient is female you multiply that whole result by 0 .85.

Why the female correction factor?

Because females on average have lower muscle mass than males at the same body weight.

The formula is trying to mathematically correct for that muscle mass issue we just discussed.

So the older you are that 140 minus age number gets smaller and the lower your weight the lower your clearance.

It all builds in the risk factors.

Correct.

This calculation gives you the real picture of kidney function and once you have that number you realize you need to adjust doses for a huge list of very common drugs.

The text uses a great mnemonic for this list.

BAND -G -DAYCAMP BAND -DD -CAMP This is table 7 .1 in the book.

These are the drug classes you must double check if the kidneys are slow.

Let's run through it.

B is for beta blockers.

Yes,

many beta blockers are renally excreted.

If they build up you get severe bradycardia, a dangerously slow heart rate and hypotension.

The text specifically calls out sotolol.

It's an antiarrhythmic.

In advanced kidney disease sotolol is contraindicated.

It can cause fatal heart rhythms if it accumulates.

Okay.

A is for ACE inhibitors and ARBs.

Lisinopril, lasartin.

These are tricky.

They are actually protective of the kidneys in the long run for many patients like in diabetes, but in the short run, especially when you start them, they can drop the GFR.

More importantly, you have to monitor potassium levels very closely because they cause potassium retention.

If the kidneys can't pee out the potassium, you get hyperkalemia, which can stop the heart.

The first N is NSAs and opioids.

This is the one I see missed the most in practice.

NSAIDs, ibuprofen, naproxen, they reduce blood flow to the kidneys.

They constrict a key artery that feeds the filter.

Oh, wow.

In an older kidney that is already struggling for blood flow, an NSAID can be the final straw that pushes them into acute kidney failure.

They should be avoided entirely in later stages of CKD.

And what about opioids?

The big villain here is maparadine demerol.

Its metabolite, normaparadine, is toxic.

It causes seizures and it's clear by the kidneys.

Just don't use it in older adults.

Period.

There are so many safer options.

Got it.

The first D is diuretics.

Thiazides and loop diuretics.

They rely on the kidney to work.

If the GFR is too low, thiazides just stop working entirely.

And again, the electrolyte -risk -low sodium -low potassium is huge.

The second D is diabetic medications.

The big concern here is profound, prolonged hypoglycemia.

Sulfonylureas like glyburide depend on the kidney for clearance.

If they build up, the patient's blood sugar crashes and stays crashed for days.

And metformin.

Metformin, the most common diabetes drug in the world, carries a risk of a rare but deadly side effect called lactic acidosis if the kidneys aren't clearing it properly.

That's why there are strict GFR cutoffs for using it.

Okay.

C is cholesterol meds.

The statins and fibrates.

If their levels get too high, they can cause rhabdomyolysis, a severe muscle breakdown that can, ironically, destroy the kidneys.

You often need to lower the dose significantly in patients with poor kidney function.

Next is A for antimicrobials.

Antibiotics.

Some are famous for being toxic to kidneys like vancomycin or the amino glycosides.

But the text flags are a really common one.

Nitroferantoin, which is macrobid.

For UTIs.

The go -to for simple UTIs.

But if the creatinine clearance is below 30 -some guidelines, even say below 60, but the text is conservative, it doesn't even get into the urine in high enough concentrations to kill the bacteria.

It just stays in the blood and can cause lung and nerve toxicity.

It's a lose -lose situation.

No benefit, all risk.

Wow, M is miscellaneous.

Digoxin is the classic one here.

It has a tiny, tiny therapeutic window.

In kidney failure, digoxin toxicity is common and leads to nausea, visual halos, and life -threatening arrhythmias.

Also, H2 blockers like famotidine pepsid, they can cause significant confusion and delirium if not dose -adjusted.

And finally, P -psychotropics.

Lithium and gabapentin are the big ones.

Gabapentin is prescribed constantly for nerve pain now.

It is 100 % renally cleared.

If you give a standard dose to a grandma with bad kidneys, she will be completely sedated, maybe even tomatose.

You have to cut the dose drastically based on her GFR.

Bandy campy.

It's like a pre -flight checklist for survival.

If your patient is on any of these, you have to check the GFR.

Exactly.

Don't guess, calculate.

So we've covered the entire movement of the drug pharmacokinetics.

Now let's flip the coin and talk about Section 6, pharmacodynamics.

This is, as you said, not what the body does to the drug, but what the drug does to the body.

This is all about receptors, the locks that the chemical keys fit into.

As we age, the number of receptors changes and their sensitivity changes.

The text starts with the cardiovascular system, the heart and blood vessels.

Right.

We see a loss of sensitivity in the adrenergic receptors.

These are the ones that respond to adrenaline epinephrine.

So the fight -or -flight response is dampened, less responsive.

Exactly.

This means the heart doesn't respond as robustly to beta blockers or to beta organists.

The volume knob on the receptor is turned down.

You might need a different strategy to manage heart rate control, for example.

But the big story in pharmacodynamics seems to be the central nervous system, the CNS, the brain.

This is the area of highest vulnerability.

We lose dopaminergic and cholinergic receptors, which are crucial for movement and cognition,

blood flow to the brain drops.

But the most critical change is to the blood -brain barrier, the BBB.

The BBB is supposed to be this tight biological security wall that keeps toxins out of the brain.

It is a very effective one.

But in aging, it becomes more permeable.

It gets leaky.

So drugs that are supposed to stay in the blood and work on the body start crossing into the brain tissue.

Yes.

Water -soluble drugs, antibiotics, chemotherapy agents, the things that shouldn't have a central effect suddenly do.

And the result of that is?

What?

CNS toxicity, dizziness, sedation, confusion, delirium, even seizures.

This is why a simple UTI antibiotic might make an older person hallucinate.

It's crossing a barrier it shouldn't cross and messing with brain chemistry.

And because their compensatory reflexes are blunted like that baroceptor reflex we talked about earlier, this dizziness leads straight to falls.

It's a perfect storm.

It's a cascade.

The drug makes them dizzy.

That's the CNS effect.

They stand up.

Their blood pressure drops.

That's the physiologic decline.

They try to correct their balance, but their reaction time is slow.

That's the neurologic decline.

They fall.

They break a hip.

It's terrifyingly interconnected.

And this brings us to the elf in the room, or maybe the pharmacy in the room, polypharmacy.

Section seven.

This is one of the most defining challenges of geriatric nursing.

Absolutely.

The text defines it as the use of more medications than is medically necessary.

Usually the literature says five drugs is the tipping point, right?

That's the common definition.

Once you cross the threshold of five medications, the probability of a drug interaction goes to nearly 100%.

And we see the rise of what are called geriatric syndromes.

These aren't diseases like pneumonia.

They are conditions like falls, delirium, urinary incontinence, cognitive impairment, weight loss.

And polypharmacy drives all of them.

Think about it.

You take a diuretic for your blood pressure, which leads to incontinence.

You take a sedative for sleep, which leads to cognitive impairment and falls.

It's often driven by the prescribing cascade.

Explain the prescribing cascade.

That's a key term the text highlights.

It's a vicious cycle.

It happens when a provider misinterprets a drug side effect as a new medical condition and prescribes another drug to treat it.

Can you give me an example?

Okay.

Classic case.

Mrs.

Jones takes amlodupin, a calcium channel blocker, for her blood pressure.

A very common side effect of amlodupin is ankle swelling edema.

Okay.

The doctor sees the swelling, thinks, oh, she has fluid overload, maybe heart failure, and prescribes ferrous meta diuretic.

The diuretic makes her pee constantly, so she develops urinary urgency and incontinence.

The doctor sees the urgency, thinks she has an overactive bladder, and prescribes oxybutynin.

So now she is on three drugs, and two of them are just treating the side effects of the first one.

Exactly.

And it gets worse.

Oxybutynin is strongly anticholinergic.

It causes confusion and constipation.

So then she gets a laxative for the constipation and a cognitive test for the confusion.

It never ends.

How do we stop this madness?

The text brings up the Beers Criteria.

The American Geriatric Society Beers Criteria.

It was named after Mark Beers, a geriatrician who created the first list back in 1991.

It was just updated in 2023.

Is it a do -not -prescribe list?

A black list?

People sometimes treat it like that, but no.

It is a list of potentially inappropriate medications, PIMS.

It's a warning light on the dashboard.

It says, hey, the risk of this drug likely outweighs the benefit.

And an older adult, is there a safer alternative you could use instead?

What are some of the famous residents of the beers list?

Oh, number one with Ebola is diphenhydramine, Benadryl.

Really?

A common allergy med?

Yes.

It has strong anticholinergic properties.

In older adults, it causes confusion, dry mouth, urinary retention, and constipation.

It's widely available over -the -counter, but it's a major cause of delirium in the hospital.

Wow.

What else?

Benzodiazepine, Xanax, Valium, Edivon.

They are major fall risks and can worsen cognitive impairment.

Also, using antipsychotics for behavioral issues in dementia patients, they carry a boxed warning for an increased risk of stroke and death.

So the goal here is de -prescribing, taking medications away.

Yes.

The bravest and sometimes smartest thing a provider can do is stop a medication.

And nurses play a huge role here.

You are the one who sees the patient every day.

You can be the one to say, hey, doc, Mrs.

Jones is really groggy every morning.

Do we still need that PM sedative we started last month?

That's a crucial role.

Let's move to section eight.

Adverse drug events, ADEs.

The stats here are pretty grim.

They are.

450 ,000 ERs since a year.

And older adults are seven times more likely to be hospitalized for an adverse drug reaction compared to a younger person.

Seven times.

Who are the main culprits?

Which drugs are sending them to the hospital?

Blood thinners and diabetes meds are the big ones.

Warfarin and insulin.

They have very narrow therapeutic indexes.

If you get the dose just a little bit wrong, you either bleed out or you go into hypoglycemic shock.

Also, opioids and digoxin are high on the list.

But it's not just the drugs fault, right?

It's often an issue of adherence, taking the drug correctly.

Adherence is huge.

And table 7 .2 in the text lists the barriers.

We really need to empathize with the patient here.

It's not just noncompliance.

That's a very judgmental word.

It's about barriers.

Let's role play a few of these barriers and the nursing solutions.

I'll be the patient.

Okay, go for it.

I have five different bottles here.

One is once a day.

One is twice a day.

One is only on Mondays.

I can't keep track.

I just, I skip them if I'm not sure.

Okay, so this is a complexity barrier.

The solution is simplification and organization.

I'd sit down with you and make a clear large print chart.

Or better yet, we get a pill organizer, one of those Monday through Sunday boxes.

Or we could even ask the pharmacy to blister pack your meds by time of day.

Okay,

next barrier.

Why am I even taking this little blue pill?

I feel fine.

I don't think I need it.

That's a lack of knowledge barrier.

If you're treating something asymptomatic, like high blood pressure, the patient feels no different.

The solution is education.

I need to explain the why.

This pill keeps your stroke risk down.

It's silent, but it's protecting your brain, connecting it to a concrete benefit.

Next one.

My hands are stiff with arthritis.

I literally cannot twist these childproof caps off.

A physical limitation.

The solution is simple.

Easy open caps.

It's just a simple checkbox at the pharmacy.

We just have to make sure there are no young grandchildren running around the house who could get into them.

Good point.

I can't read the label.

The font is tiny and my eyes aren't what they used to be.

That's a sensory deficit.

The solution.

Ask the pharmacy for large print labels.

Or we can color code the bottles with stickers.

Blue sticker for morning meds.

Red sticker for night meds.

Simple visual cues.

And the big one.

I have to choose between buying my groceries for the week and buying this one prescription.

It's $200 a month.

Financial toxicity.

This is where the nurse has to act as a social worker and advocate.

We need to look at generic alternatives.

We need to check their Medicare Part D coverage.

Part D is the prescription drug coverage, right?

Yes.

But it has the infamous doughnut hole.

A coverage gap where the patient suddenly has to pay a lot out of pocket before catastrophic coverage kicks in.

Many patients stop taking critical meds when they hit the doughnut hole.

We need to connect them with resources like the Partnership for Prescription Assistance or Pharmaceutical Compassionate Care Programs.

That leads us perfectly into Section 9.

Health teaching strategies.

How do we communicate all this information effectively?

Rule number one, and this is non -negotiable, check the hardware.

Before you start teaching, does the patient have their glasses on?

Are their hearing aids in and turned on?

It sounds so ridiculous to say, but I bet that gets missed constantly.

Oh, all the time.

A nurse starts talking, the patient just nods and smiles, but they haven't heard a single word.

You have to verify.

And how do we speak?

What's the right way to talk?

Clearly, slowly, and facing the patient so they can read your lips if they need to.

But the most important thing is to avoid elder -speak.

Define that for me.

Hi, sweetie.

How are we doing today, honey?

You're a good girl for taking your meds.

It's that infantilizing baby talk language.

But it sounds nice on the surface, though.

Friendly?

It is patronizing.

It implies they are children, not adults with a lifetime of experience.

Studies show that using elder -speak actually increases resistive behaviors in dementia patients.

It lowers their self -esteem.

Address them with respect.

Mr.

Smith or Mrs.

Jones?

That is a powerful and really important insight.

What about written materials we give them?

High contrast.

Dark text on a light background.

And the text suggests using serif fonts.

Why serif?

Those are the ones with the little feet and tails on the letters, like Times New Roman.

Yes.

Those little feet help the eye track the line across the page.

Block fonts, what we call sans serif, can blur together more easily for aging eyes.

It's a small detail that improves readability.

There were two specific safety tips in the teaching section I loved.

One was the vial of life.

Yes.

Emergency Medical Services EMS are trained to look for this.

You put a comprehensive list of your meds, allergies, and emergency contacts in a vial or a red plastic bag, and you stick it on your refrigerator door with a magnet.

Why the fridge?

Because every home has a fridge, and it's usually in the same place in the kitchen.

If EMS comes in and you are unconscious, they know to go to the fridge.

It saves critical time and saves lives.

And the second tip was the brown bag review.

This is the absolute gold standard for preventing polypharmacy and catching errors.

You tell the patient, next time you have an appointment, bring everything you take.

Put it all in a brown paper bag and bring it in.

Not just a list they wrote down, the actual bottles.

The bottles, the over -the -counters, the herbal teas, the vitamins, the old prescription from three years ago that they still take sometimes when they feel they need it.

What do you usually find in the bag?

Chaos.

You find expired meds.

You find two generic versions of the same drug from different pharmacies, so they are accidentally taking a double dose.

You find St.

John's wort, which interacts with everything under the sun.

You cannot truly reconcile a med list until you see the bag.

Finally, let's wrap this all up with section 10, the nursing process.

Clinical judgment.

How do we pull this all together into a practical workflow?

It follows the classic ADPIE framework assessment, diagnosis, planning, intervention, evaluation,

but customized for geriatrics.

Okay, so assessment, recognizing the cues.

You are assessing for those sensory and cognitive barriers we talked about.

You are checking the labs, but you're remembering the creatinine paradox and the liver enzyme trap.

You're asking about alcohol use, which is a huge hidden issue in the elderly.

You're asking about their ability to pay for meds and open the bottles.

Then planning,

generating solutions.

The goal is realistic adherence.

Can they afford it?

Can they open it?

Does the dosing schedule fit their life?

If they take a diuretic, don't schedule it for 8 p .m., so they have to get up and pee all night long.

That's a setup for a fall.

Interventions.

Taking action.

This is where you monitor, and please remember this.

In older adults, a change in mental status is often the first and sometimes the only sign of drug toxicity.

So if grandma suddenly gets confused or agitated, don't just assume it's her dementia worsening.

Assume it's the meds until proven otherwise.

Always blame the meds first.

It's the safest assumption.

Check the list.

Is there a new UTI antibiotic?

A new sedative?

A new pain medication?

And lastly, evaluation.

Is the drug actually doing what it's supposed to do?

And is the cost in terms of side effects worth the benefit?

You have to constantly reevaluate.

Just because they needed a drug five years ago doesn't mean they need it today.

Physiology changes.

The prescription should change with it.

This has been a massive, massive deep dive.

We've covered physiology, ADME, bandy camp, the beers criteria, and the really critical nuances of patient teaching.

It is a lot, but if you strip it all away, it just comes back to that central theme.

The aging body is a different environment.

It is more fragile, less resilient, and far more prone to accumulation.

Start low and go slow.

It's the only way to be safe.

As a nurse, you are the last line of defense.

The computer system might miss the interaction.

The doctor might be rushed and miss the subtle decline in kidney function on the labs.

But you are there, at the bedside, with the patient.

You're the one who catches the new confusion.

You see the unsteadiness when they walk.

You're the one who spots the duplicate bottles in the brown bag.

That is the job.

That is patient -centered care.

You're not just giving a pill.

You're protecting a person.

A huge thank you to everyone listening.

We know pharmacology is heavy.

But understanding this specific chapter geriatrics will make you a safer, better, more compassionate nurse for the millions of older adults who are counting on you.

Absolutely.

Keep learning and always, always keep questioning the why.

This has been a deep dive from the Last Minute Lecture team.

Thanks for listening.