Chapter 87: Complementary and Alternative Therapy

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Right now, up to 70 % of your patients are hiding a secret from you.

Yeah, a pretty big one, too.

They really are.

I mean, they're taking these pharmacologically active compounds,

mixing them with the prescriptions you're literally handing them.

And well, they're not going to say a single word about it unless you specifically ask.

Exactly.

And welcome to this deep dive.

Today we're talking directly to you, the nursing student.

Right.

Our mission today is to, you know, really unpack Chapter 87 of Lenz Pharmacology for Nursing Care, the 12th edition.

We are looking at complementary and alternative therapy or SAM.

And honestly, the stakes for your clinical practice here, they really could not be higher.

No, they couldn't.

So to get our baseline facts straight, according to the National Center for Complementary and Integrative Health, it's like almost a third of U .S.

adults.

I think it's 32 .3%.

Yeah, 32 .3%.

They use some form of CAM.

And you know, just to clarify terms, when we say complementary, we mean it's used alongside conventional medicine.

But alternative means it's used, like in place of it.

But either way, understanding these dietary supplements is just absolutely non -negotiable for making safe medication decisions.

So, I mean, why are patients keeping this a secret or, you know, turning to these in the first place?

If you look at Table 87 .1 in the text, it basically comes down to a few core reasons.

Right, like empowerment.

Yeah, some patients just feel a sense of empowerment, you know, taking charge of their own health

or others are just frustrated with their health care providers.

Or they lack insurance, so they're, like, desperate to save money.

Exactly.

Add in the incredibly aggressive marketing from supplement companies.

And, well, you have a perfect storm.

And that storm is allowed to rage because of how these products are regulated, or, I mean, rather, how they aren't regulated.

Right.

In 1994,

the Dietary Supplement Health and Education Act, which we call DSHEA, it completely flipped the script on FDA oversight.

It really did.

Yeah, because under traditional pharmacology, a drug is presumed dangerous until proven safe.

Like a manufacturer has to hand over a literal mountain of clinical trials before it ever hits a pharmacy shelf.

Right.

The traditional FDA approval process is it's kind of like a strict bouncer at an exclusive nightclub, you know, like the bouncer checks the ID, pats the drag down for adverse effects.

And, like, only then do they let it inside.

Exactly.

But under DSHEA, botanical products, vitamins and minerals,

they're categorized as dietary supplements, not drugs.

So it's like they bought a VIP pass.

Totally.

They just walk right into the club, completely bypassing the bouncer.

They are, you know, presumed safe until proven hazardous.

Which is wild.

Right.

The FDA only steps in if someone essentially, like, starts a fire on the dance floor.

And because they aren't drugs, they get to play these, like, semantic games with their It is a massive loophole.

Oh, absolutely.

A manufacturer cannot legally claim their product diagnoses, treats or cures a disease.

Like they can't put cures Alzheimer's on the bottle.

All right.

That would get them shut down.

But they are allowed to claim it influences a structure or function of the body.

So they just pivot and write, promotes urinary health or, you know, supports mental clarity.

It's just hair splitting.

Yeah.

I mean, it really is.

But the real danger historically was that under DSHEA, there was absolutely no guarantee a product actually contained what the label said.

Yeah.

The chapter mentions some truly terrifying historical examples of this.

Oh, they're awful.

Like there was a bowel cleanser contaminated with digitalis, which is, you know, a plant with life -threatening, heart -stopping effects.

And those Asian patent medicines laced with lead and arsenic.

Just crazy.

Which is exactly why we finally got some new guardrails.

The 2006 Consumer Protection Act, it mandated a 15 -day reporting window for serious adverse Meaning, like, if someone is hospitalized or dies, the manufacturer has to tell the FDA within two weeks.

Right.

And following that, in 2007, we got the concurrent good manufacturing practices or CGMP.

Which was huge.

Yeah.

These are rules designed to ensure these supplements are actually devoid of adulterants, microbes and heavy metals and that they, you know, actually contain what's promised on the label.

Okay.

So that helps with purity.

But what about potency?

Table 87 .2 talks about the struggle with standardization.

Because at the end of the day, these are crops.

Right.

The amount of sunlight, the rain, the soil quality.

It all changes the chemical makeup of a plant from harvest to harvest.

So to fix this variability, manufacturers use this three -step standardization process.

Yeah.

They prepare an extract,

analyze it for an active ingredient, and then they dilute or concentrate it.

Right.

So for example, they'll process black cohosh until they ensure it has exactly two point five percent triterpene glycosides.

That's the goal anyway.

But standardization has this major kind of ironic drawback.

Oh.

Yeah.

By forcing the plant through this whole chemical extraction process to isolate one specific compound,

manufacturers might actually be destroying, you know, as yet unidentified active compounds that make the whole plant effective in the first place.

Wow.

Wait a second, though.

I want to look at the big picture here for a minute.

Sure.

The chapter mentions a really famous New England Journal of Medicine editorial that basically says there is no such thing as alternative medicine.

Right.

I remember that.

It says there is only medicine that has been tested and proven to work and medicine that hasn't.

So if there's no definitive proof that a lot of these supplements cure anything and the FDA doesn't even classify them as drugs, why are we as nurses spending an entire chapter agonizing over them?

Like, why not just ignore them?

That's a fair question.

But it's because regardless of whether their clinical efficacy is definitively proven,

they possess profound pharmacologic effects inside the human body.

Okay.

So they're still doing something.

Oh, absolutely.

They alter blood pressure.

They change liver enzymes.

They thin the blood.

And returning to your opening point, since 70 % of patients don't volunteer that they take them, the nursing application here is crystal clear.

You must explicitly ask about over -the -counter and herbal products during every medication history.

You literally have to pull it out of them.

Right.

And if a patient asks you how to find a safe supplement,

tell them to look for a seal approval from private quality assurance organizations like the USP or Consumer Lab.

Yeah, they independently test for purity and labeling accuracy, which is big help.

Definitely.

So let's look at what these patients are actually taking.

We're going to move systematically through the most common dietary supplements your textbook highlights, looking at the exact mechanisms and the crucial clinical implications you really need to know.

Let's start with women's health.

First up is black cohosh, which patients take for menopause symptoms like hot flashes.

And what's wild is that its mechanism of action is completely unknown.

Literally no idea.

Right.

We know it does not bind to estrogen receptors, but somehow it relieves symptoms.

The main adverse effect to monitor for is liver inflammation, but the biggest nursing implication here is a naming issue, right?

Yes.

You must warn your patients not to confuse black cohosh with blue cohosh.

They sound so related.

They do.

But blue cohosh is incredibly dangerous for pregnant patients because it profoundly induces uterine contractions.

Wow.

Okay.

Moving from menopause to neurological relief, we have Butterbur.

This is used for migraines and allergies, and it works mechanically as an anti -inflammatory and anti -spasmodic.

And this is one of the rare supplements with incredibly strong clinical backing.

I mean, the American Academy of Neurology actually gives it a level A rating for preventing migraines.

That's huge.

It is.

But here is the catch for your patient education.

Raw Butterbur contains pyrolyzodane alkaloids, which frankly, aggressively destroy the liver.

Oh, man.

So you must educate patients to only buy formulas explicitly labeled PA -free.

That is so important.

Sticking with neurology, let's talk about cannabidiol, or CBD.

Thanks to the 2018 Farm Bill, hemp -derived CBD is federally legal.

Yeah, patients use it a lot for anxiety and pain.

And it works by activating the endocannabinoid system.

Clinically, the FDA has actually approved a specific CBD pharmaceutical apediolex for certain severe seizure disorders.

But as a nurse, your radar should immediately go up for drug interactions here.

Because of the liver enzymes, right?

Exactly.

CBD is metabolized by CYP enzymes in the liver.

If the liver is busy metabolizing CBD, it can't break down other drugs efficiently.

Which means they build up.

Right.

Which can lead to toxic buildups of medications like anti -seizure drugs or blood thinners.

But what about when a traditional drug actually pauses a problem and a patient uses a supplement to fix it?

Like, that brings us to coenzyme Q10 or CoQ10.

Oh, this is a great example.

Yeah, this is a potent antioxidant crucial for ATP energy production in our cells.

Patients take it for heart failure, but they also take it for muscle injury caused by statin drugs.

Right, because statins actually deplete the body's natural CoQ10.

Exactly.

But the crucial interaction here is with the blood thinner warfarin.

Oh, this is so testable.

It really is.

CoQ10 is structurally very similar to vitamin K2.

Since warfarin works by blocking vitamin K to prevent clots, taking CoQ10 essentially acts as an antagonist.

It literally reverses the anticoagulant effects of the warfarin.

So treating your muscle pain could accidentally cause a fatal blood clot.

That's a vital connection for a nursing student to make.

Seriously.

Speaking of common remedies, let's bust a myth about cranberry juice.

Yes, please.

Patients use it to prevent urinary tract infections.

For decades, people thought it worked by making the urine highly acidic, you know, killing the bacteria.

Right, that's what everyone says.

But that is false.

It actually uses compounds called proanthocyanidins that physically coat the bacteria, blocking them from adhering to the urinary tract wall.

And just like CoQ10, it can increase bleeding risk in patients taking warfarin.

Another warfarin interaction.

Yep.

Then we have echinacea, used to stimulate immune function for the common gold.

The nursing implications here are entirely about the immune system.

So who should avoid it?

You want to avoid it in patients with autoimmune diseases like lupus or rheumatoid arthritis because, well, you don't want to stimulate an already overactive immune system.

That makes sense.

And ironically, while short -term use stimulates immunity,

prolonged use actually suppresses it.

So long -term use must be strictly avoided in patients with tuberculosis or HIV.

You know, as we move through this list, a major recurring theme is jumping out at me.

We just keep seeing these seemingly harmless natural herbs causing massive bleeding risks.

It's a pattern you have to burn into your memory for clinical practice.

And we see it clearly with feverfew, which is used for migraine prophylaxis thanks to an active agent called parthenolide.

Because of that bleeding risk, the nursing implication is to stop feverfew two weeks before any elective surgery.

Right.

You also want to avoid it in pregnancy because it causes uterine contractions and avoid it if the patient has a ragweed allergy.

Good catch on the allergy.

And keeping with the cardiovascular system, we have fish oil, which provides omega -3 fatty acids.

Right.

Patients take fish oil for cardiovascular disease, even though the American Heart Association's data on its effectiveness is, honestly,

somewhat mixed.

Yeah, it's not a silver bullet.

No.

The primary contraindication is a seafood allergy.

But mechanically, high doses reduce platelet aggregation, meaning it stops blood cells from sticking together.

So if you combine it with anti -platelet drugs.

You're compounding that bleeding risk, exactly.

Let's shift from bleeding risks to physical blockages in the gut.

Flaxseed provides soluble fiber used for dyslipidemia and constipation.

And mechanically, it acts like a bulk -forming laxative.

Think of it like laying down a thick gel -like carpet over the stomach lining.

Because of this, it can physically block the absorption of conventional medications.

It just traps them.

Yeah.

So you must teach patients to take flaxseed one hour before or two hours after their other drugs.

Once a supplement actually makes it past the gut and into the bloodstream, we see systemic effects.

Take garlic.

Oh, garlic.

It's used to lower blood pressure.

It does this via an active compound called allicin, which promotes the release of nitric oxide, which is a powerful vasodilator that widens blood vessels.

But the interactions are severe.

Garlic creates another massive bleeding risk.

Plus, here's a highly textible fact for you.

It significantly reduces the blood levels of two specific drugs, cyclosporine, which is an immunosuppressant, and sequinovir, an HIV medication.

It actually alters how they are absorbed and metabolized.

It's amazing how much it disrupts.

Truly.

Now, staying in the GI tract, let's talk about ginger root.

Looking at its mechanism, ginger blocks serotonin receptors in the chemoreceptor trigger zone in the brain.

Wait, is ginger basically acting like a natural zofran?

That's exactly how you should think about it.

It blocks those exact same 5 -HD3 receptors, which is why it's so highly effective for morning sickness and general nausea.

Wow, I never made that connection.

It's cool, right?

But keeping with our theme, high doses carry a bleeding risk, and it can also potentiate hypoglycemic drugs, driving a diabetic patient's blood sugar dangerously low.

Next is ginkgo biloba, which is historically famous for memory enhancement.

Keyword.

Historically.

I say historically because the massive GM study cited in the text proved it completely failed to prevent dementia.

It works by causing vasodilation.

Two huge dangers to flag here.

First, raw ginkgo seeds are toxic.

Which is terrifying.

Second, ginkgo not only causes bleeding, but it lowers the seizure threshold.

Meaning it makes it physiologically easier for a seizure to occur.

Exactly.

So patients on antipsychotics or antidepressants, which already affect brain chemistry, need to avoid it.

Rounding out this section, we have glucosamine and chondroitin, widely used for osteoarthritis.

Very popular.

Super popular.

Mechanically, they are meant to stimulate cartilage production.

However, it's important to note that the American College of Rheumatology strongly recommends against using them for knee and hip osteoarthritis, offering only a conditional exception for hand osteoarthritis.

And your nursing implications.

Commercial glucosamine is often derived from shrimp exoskeletons.

Ah, allergies.

Yep.

So use extreme caution if the patient has a shellfish allergy.

And of course, watch out for our favorite theme,

bleeding risk.

Always the bleeding risk.

Always.

Let's shift gears now to metabolism, sleep, and the gut flora.

First is green tea.

People use green tea extracts for weight loss and mental clarity, primarily due to the caffeine.

But the interactions are tricky.

Green tea actually contains a small amount of vitamin K.

And as we discussed earlier, vitamin K directly antagonizes the anticoagulant effect of warfarin.

Exactly.

Additionally, severe hepatotoxicity, or liver damage, has been reported with highly concentrated green tea extracts.

Next is marijuana, containing both psychoactive THC and non -psychoactive CBD.

It's used medically for chemo -induced nausea and chronic pain.

The FDA has actually approved a synthetic THC called dronabinol.

Right.

But mechanically, marijuana causes central nervous system depression.

Crucially, THC is highly lipophilic.

It loves fat.

Meaning it readily crosses the placenta.

Exactly.

And it concentrates in breast milk, so you must firmly discourage breastfeeding if a patient is using it.

For sleep, patients often turn to melatonin, a naturally occurring hormone.

What's highly relevant for your practice is that while evidence is actually insufficient to recommend it for chronic adult insomnia, the American Academy of Neurology specifically recommends pharmaceutical -grade melatonin for sleep disruptions in children and adolescents with autism spectrum disorder.

That's a really specific testable distinction right there.

It is.

Next is peppermint, which is gaining serious traction for irritable bowel syndrome and small intestine bacterial overgrowth, basically due to its antibacterial properties.

The mechanism here is fascinating to me.

Oh, tell me.

Menthol in the peppermint stimulates TRPM8 receptors.

These are literally cold receptors in the GI tract.

Wait, cold receptors?

Activating them provides a biological ice pack effect, which relieves pain.

That is so cool.

Pun intended.

But there's a mechanical side effect.

Peppermint oil relaxes smooth muscle, which means it can lower the pressure of the esophageal sphincter, the valve -keeping stomach acid, down.

Oh, so that causes severe acid reflux or GERD.

Right.

To prevent this, patients must use enteric -coated gel capsules so the medication passes intact through the stomach and only releases once it hits the intestines.

Next up, probiotics.

These are the normal gut flora, like lactobacilli and the yeast saccharomyces boulardii, used for GI issues like C.

diff diarrhea.

But there is a massive safety alert here for inpatient nurses.

Yes.

This can be life or death in an ICU setting.

Fungicinia, which is a systemic fungal infection in the blood, has occurred when packets of This boulardia, sold under the brand name Florestor, are ripped open at the bedside.

Because the spores become airborne.

Exactly.

The yeast spores become airborne.

Because of this, it is strictly contraindicated in patients with central lines.

Also, logically, you must dose probiotics at least two hours apart from any antibiotics or antifungals.

Otherwise, the prescription drug will just annihilate the probiotic before it can work.

Makes total sense.

Last in this metabolic section is resveratrol, the antioxidant found in Greek skins.

It works by inhibiting PDE enzymes.

Think of PDE enzymes as the body's cleanup crew for cell signaling.

By inhibiting them, resveratrol keeps certain cellular signals firing longer.

But here is the interaction warning.

This mechanism mimics the effects of estrogen.

So it must be completely avoided in patients with estrogen -dependent breast cancer.

Precisely.

It also increases insulin sensitivity, so you have to monitor diabetic patients closely.

Moving into our final system group.

We are looking at urology, hormones, and honestly, some of the most dangerous drug interactions in the entire textbook.

Oh boy.

We start with saw palmetto.

Patients use it for BPH, or benign prostatic hyperplasia, even though large studies show it's basically ineffective.

But the safety alert here is absolute.

Saw palmetto is strictly contraindicated in pregnancy.

It has anti -antigenic effects, meaning it actively blocks male hormones.

Which represents a severe developmental danger to a male fetus.

Next is soy, which contains phytoestrogens.

Patients use it to manage hot flashes and for breast cancer prevention.

But because it has estrogenic action, it should never be combined with tamoxifen, which is a drug designed to block estrogen receptors.

And here is an incredible clinical irony.

Taking antibiotics can actually kill the specific gut bacteria required to convert soy into its active form in the body.

Wait, let me get this straight.

If a patient is taking soy to manage their hot flashes, and you give them an antibiotic for a sinus infection, the antibiotic wipes out their gut flora, which accidentally neutralizes their soy supplement.

You nailed it.

That is wild, but it shows how connected these systems are.

Okay, here we are.

St.

John's work.

Used from mild to moderate depression, I constantly hear this herb described as the absolute final boss of drug interactions.

Oh, it really is.

Why is it so incredibly dangerous to mix?

It's the final boss because it attacks from three distinct pharmacological mechanisms.

Let's break them down.

Okay.

Mechanism one, it strongly induces the CYP3A4 liver enzyme.

Think of CYP3A4 as the liver's garbage disposal for drugs.

Okay, got it.

St.

John's work shifts that disposal into overdrive.

So if your patient is on birth control, the liver shreds those hormones before they can even work, leading to an unwanted pregnancy.

Or it destroys cyclosporine, leading to organ transplant rejection.

That's terrifying.

And mechanism two is just as aggressive.

Exactly.

Mechanism two, it induces P -glycoprotein.

This is a transport protein that acts like a bouncer at a club,

literally pumping drugs out of cells and dumping them into the urine or intestines.

So by ramping up this bouncer, St.

John's work aggressively flushes the heart failure drug digoxin out of the kidneys, causing subtherapeutic levels and putting the heart at serious risk.

And the third mechanism.

Mechanism three,

it enhances serotonergic transmission.

It floods the communication gaps in the brain with serotonin.

So if you mix St.

John's wort with conventional antidepressants, which also increase serotonin, it causes a massive toxic overload in the brain, leading to potentially fatal serotonin syndrome.

So as a nurse, if your patient is taking almost any other medication, St.

John's wort is a giant red flag.

The biggest red flag.

Finally, we end this list with Valerian.

Used for sleep, it works by increasing the availability of GABA, which is the brain's main calming inhibitory neurotransmitter.

But the adverse effects include paradoxical excitation, meaning instead of calming you down, it actually wires you up.

It also causes physical dependence and dangerous synergistic CNS depression if a patient mixes it with alcohol or opioids, which brings us to the final section of the chapter.

The FDA's blacklist, really bad stuff.

These are the harmful supplements that are actively dangerous.

And you, as the nurse, must warn patients to avoid them entirely.

First is comfrey.

It contains pyrolyzidine alkaloids.

Remember those from our better burr discussion?

Yeah, the liver destroyers.

Exactly.

Taking comfrey orally causes hepatic venoo occlusive disease, which blocks the blood vessels in the liver, leading to severe, sometimes fatal liver damage.

Second is kava.

It has been heavily promoted in the U .S.

as a natural alternative to Valium for anxiety.

However, the mechanism is so toxic to hepatocytes that perfectly healthy patients have rapidly required liver transplants.

And the last one is mahwong, also known as ephedra.

It contains ephedrine, which is a massive cardiovascular and central nervous system stimulant.

It drives blood pressure and heart rate through the roof.

And has been directly associated with stroke, myocardial infarction, and death.

It was so undeniably lethal that the FDA officially banned U .S.

sales of ephedra products containing more than 10 mg per dose.

If we connect all of these mechanisms back to the overarching theme of this chapter, there is one specific concluding key point the textbook makes that you must take to heart as a clinician.

What's that?

Just because a substance is natural does not mean it is safe.

Exactly.

After all, poison ivy and tobacco are 100 % natural, too.

You have to let that concept guide your patient education.

People assume natural equals harmless, and as we've seen today with massive bleeding risks, sudden liver failure, and toxic drug interactions, that is simply not true.

You are the last line of defense in the clinical setting.

Taking a thorough, probing medication history that specifically asks about these natural supplements is how you uncover those secrets and protect your patients.

Thank you so much for joining us on this deep dive.

From all of us here and the Last Minute Lecture team, we want to wish you the absolute best of luck on your pharmacology exams and in your future nursing career.

Keep studying hard.

And as you walk into your next clinical shift, I want you to remember our opening metaphor.

DSHEA might have opened the doors and let every supplement walk right into the club without an ID check, but you are the medic on the dance floor.

It's up to you to know exactly who is in the room and how to keep your patients safe.