Nursing Field Notes / Cardio · Pharmacology

Cholesterol Lowering Agents 💊

Statins · Ezetimibe · Sequestrants · Fibrates · Niacin · PCSK9

NG-242 Cardio · Pharm ADHD-friendly visual edition

Indication: high cholesterol — hypercholesterolemia · hyperlipidemia · dyslipidemia (different names for the same thing). Every drug on this page is aiming at one target: the plaque from NG-145. Lower the LDL, calm the artery wall, and thicken the fibrous cap so it doesn't rupture. Statins are the backbone.

📄 Simple Nursing original — opens in Drive →

💊 “-statin”Blocks the liver enzyme that MAKES cholesterol. First-line, biggest LDL drop.

💪 Muscle pain = REPORTNew muscle aches/cramps/tenderness without injury → call the HCP. Rhabdo risk.

🍊 NO grapefruitIt blocks the enzyme that clears the statin → drug piles up → more myopathy.

🌙 Take at NIGHTCholesterol is made mostly while she sleeps — dose the short-acting statins at dinner/bedtime.

💊

WHAT THEY DO

STEP 1 · SIX DIFFERENT ATTACKS

Each class hits cholesterol at a different address: the liver factory, the gut doorway, the bloodstream, or the liver's recycling receptors.

🗺️ Where each class works

🧠 “Factory, Door, Highway.” Statins & PCSK9 shut down the factory (liver). Ezetimibe & sequestrants guard the door (gut). Fibrates & niacin clean up the highway (blood). Every drug on this page has one of those three addresses.

💊 STATINS — “-statin” — the first-line backbone

atorvastatin · simvastatin · lovastatin · rosuvastatin · pravastatin

MOA: it prevents cholesterol production in the liver — technically by blocking the enzyme the liver needs to make cholesterol: HMG-CoA reductase. Less cholesterol made inside → the liver puts out more LDL receptors → it pulls LDL out of the blood.

⬇️ Biggest LDL drop of any oral class — the reason it's first-line
🛡️ Also stabilizes the plaque cap and lowers inflammation — benefit beyond the number (NG-145)
🫀 Started for essentially every post-MI/ACS client and most with established atherosclerosis

🧠 “S-STATIN = Stay Clean, Smooth Tin can.” A smooth tin pipe with nothing stuck to it — the statin keeps the artery clean and smooth. Say it long: “STAAA-TIN.”

⚠️ -statin vs NYSTATIN — the look-alike trap

💊 “-statin” (lovastatin, simvastatin…)	🍄 NYSTATIN
Cholesterol-lowering — blocks HMG-CoA reductase in the liver	ANTIFUNGAL — treats yeast infections (oral thrush, candidiasis, diaper rash)
Oral tablet, usually once daily	Often a swish-and-swallow or swish-and-spit suspension, or a topical powder/cream
Watch: muscle pain, liver enzymes	Watch: it must contact the fungus — hold it in the mouth, don't eat/drink right after

EXAM TIP NYstatin = NO cholesterol. It's for YEAST.

🧠 “NY = New York yeast — a bagel.” NYstatin belongs with the bread and the yeast, not with the arteries. If the stem says thrush, it's nystatin; if it says LDL, it's a “-statin.”

🗂️ The other five classes, cleanly separated

💊 EZETIMIBE — the absorption blocker

ezetimibe

MOA: blocks cholesterol absorption at the small-intestine brush border — dietary and biliary cholesterol never gets in.

Use: usually added on to a statin when LDL isn't at goal, or used alone if she can't tolerate statins. Modest LDL lowering on its own.

Watch: generally well tolerated — GI upset/diarrhea; rare myalgia (more likely when combined with a statin); can raise liver enzymes when combined.

💊 BILE ACID SEQUESTRANTS — the bile sponge

cholestyramine · colestipol · colesevelam

MOA: bind bile acids in the gut so they're excreted in stool. The liver must then use up cholesterol to make new bile → blood LDL falls. Same trick as the soluble fiber in oatmeal.

Big advantage: not absorbed systemically — it works entirely inside the gut.

Watch: CONSTIPATION (the classic), bloating, gas. May RAISE triglycerides — a poor choice if TGs are already high.

HUGE NURSING POINT It binds other drugs and the fat-soluble vitamins A, D, E, K. Give other medications 1 hour BEFORE or 4 hours AFTER the sequestrant — think digoxin, warfarin, levothyroxine, thiazides.

💊 FIBRATES — the triglyceride specialists

gemfibrozil · fenofibrate

MOA: speed the breakdown and clearance of triglyceride-rich particles (they activate the pathway that boosts lipoprotein lipase).

Best at: lowering TRIGLYCERIDES — the go-to for very high TGs, including preventing pancreatitis. Modest HDL rise, little LDL effect.

Watch: GALLSTONES (cholelithiasis), GI upset, ↑ liver enzymes, and myopathy — the risk climbs sharply when combined with a statin (gemfibrozil is the worst offender). Use with caution in kidney disease.

💊 NIACIN (nicotinic acid, vitamin B₃) — the HDL raiser

niacin · extended-release niacin

MOA: reduces the liver's release of VLDL → ↓LDL and ↓triglycerides, and it raises HDL more than any other agent.

Watch — the one everybody tests: FLUSHING — hot, red, itchy face and neck. It's prostaglandin-mediated and harmless but miserable.

💊 Take aspirin about 30 minutes before the dose (if the provider approves) to blunt flushing
🍺 Avoid alcohol and hot drinks around the dose — they intensify flushing
⏳ Extended-release forms flush less; flushing fades over weeks of consistent use
🍬 Also: hyperglycemia (caution in diabetes), hyperuricemia/gout flares, GI upset, hepatotoxicity at high doses
❗ The therapeutic dose is far above the vitamin dose — this is a drug, not a supplement

💉 PCSK9 INHIBITORS — the injectable heavy hitters

alirocumab · evolocumab

MOA: monoclonal antibodies that block PCSK9, the protein that destroys LDL receptors. Block it → the liver keeps far more LDL receptors → it vacuums LDL out of the blood. Very large LDL reductions.

Use: familial hypercholesterolemia, or established atherosclerotic disease when a maximally tolerated statin (± ezetimibe) isn't enough, or true statin intolerance.

Route: SUBCUTANEOUS injection every 2–4 weeks — not a pill. Teach self-injection, site rotation, refrigerate and let the pen reach room temperature before injecting.

Watch: injection-site reactions, flu-like symptoms, nasopharyngitis. Cost/prior authorization is a real-world barrier — ask about it.

Also on the shelf: prescription omega-3 fatty acids (for very high triglycerides) and bempedoic acid (an oral non-statin LDL-lowering option). Know they exist; the six above are the exam set.

🧠 “Six drugs, six verbs.” Statin = stop making it · Ezetimibe = stop absorbing it · Sequestrant = flush the bile · Fibrate = fix the triglycerides · Niacin = nudge HDL up (and flush her face) · PCSK9 = put out more catchers.

📊 Which drug for which number?

Class	LDL	Triglycerides	HDL	Signature adverse effect
Statins	⬇️⬇️⬇️ biggest	⬇️	⬆️ slight	Myopathy / rhabdo, ↑ liver enzymes
Ezetimibe	⬇️ modest	↔️ / slight ⬇️	↔️	Well tolerated; GI upset
Bile acid sequestrants	⬇️⬇️	⬆️ can raise	↔️ / slight ⬆️	Constipation + binds other drugs
Fibrates	↔️ / slight ⬇️	⬇️⬇️⬇️ biggest	⬆️	Gallstones, myopathy with statins
Niacin	⬇️	⬇️⬇️	⬆️⬆️ biggest	FLUSHING, ↑ glucose, ↑ uric acid
PCSK9 inhibitors	⬇️⬇️⬇️ huge	↔️	slight ⬆️	Injection-site reaction, SubQ route

🧠 Match the drug to the abnormal number: LDL sky-high → statin (then ezetimibe/PCSK9). Triglycerides sky-high → fibrate. HDL in the basement → niacin. That one line answers most "which med would the nurse expect" questions.

🧪

THE LIPID PANEL

STEP 2 · KNOW THE NUMBERS COLD

Four numbers. Three you want low, one you want high. These are standard adult reference targets.

🧪 Target vs bad — the bar scale

EXAM TIP Clients with known heart disease or diabetes are usually pushed to a lower LDL than 100 — the <100 figure is the general adult target, not a ceiling for high-risk clients. Practice varies; follow the provider's stated goal.

🧠 Count down by 50s: 200 → 150 → 100 → and HDL is the odd one at 40 going UP. Total 200, trigs 150, LDL 100, HDL 40+. LDL = Lousy = Low. HDL = Happy = High.

🧪 Labs to draw & watch

Lipid panel — baseline, then to check response (often re-checked weeks to months after a change)
ALT & AST — baseline liver function before starting a statin; re-check if she has symptoms
CK (creatine kinase) — drawn when she reports muscle pain, to look for myopathy/rhabdo
Creatinine / BUN — kidney function, especially with rhabdo risk or fibrates
A1c / glucose — statins and niacin can nudge glucose up
Uric acid — niacin can precipitate gout

🧠 “Muscle pain → CK. Yellow eyes → ALT/AST.” The complaint tells you which tube to send.

🍽️ Diet still does half the work

🥣 Soluble fiber (oats, beans, barley, psyllium) — binds bile, same mechanism as sequestrants
🐟 Fatty fish & omega-3s — help triglycerides
🥑 Swap saturated & trans fats for unsaturated (olive oil, nuts, avocado)
🍬 Cut refined sugar & alcohol — the biggest drivers of high triglycerides
🏃 Exercise — the most reliable way to raise HDL
🚭 Smoking cessation — smoking lowers HDL directly

🧠 “Sugar makes triglycerides; fat makes LDL; movement makes HDL.” Three sentences, three numbers, three behaviors.

⚠️

WATCH FOR

STEP 3 · THE STATIN ADVERSE EFFECTS

ATI, HESI and Kaplan all ask the exact same question about statins — and the answer is always the muscles.

💪 Muscle pain without injury = REPORT IT

Answer first: new muscle aches, cramps, spasms, tenderness or weakness that she cannot explain by exercise or injury → notify the HCP. This is the single most tested statin fact.

🧠 “Sore muscles → dark pee → sick kidneys.” Three beats, in that order. Rhabdo isn't “muscle pain,” it's muscle dissolving — and the kidney is downstream of the mess.

🧪 Toxic liver — ALT & AST

🧪 Baseline liver enzymes (ALT/AST) before starting; re-check if she develops symptoms
💩 Report clay-colored stools — the classic source cue
💛 Jaundice (yellow skin/sclera), dark urine, RUQ pain, unusual fatigue, loss of appetite, nausea
🍺 Limit alcohol — adds liver insult
⚠️ Use caution/avoid in active liver disease

Serious statin liver injury is uncommon, but the teaching point is constant: symptoms get reported, not waited out.

🧠 “Clay stool, dark pool, feeling cruel.” Pale stools + dark urine + fatigue = liver. (Dark urine shows up in both liver injury and rhabdo — so pair it with the other clues.)

🍊 Grapefruit — and the St. John's wort correction

Answer first: No grapefruit or grapefruit juice with simvastatin, lovastatin or atorvastatin.

Why: grapefruit inhibits the CYP3A4 enzyme that clears these statins → the drug builds up → higher myopathy/rhabdo risk
Not all statins: pravastatin and rosuvastatin aren't metabolized by CYP3A4, so grapefruit is far less of an issue with them — but teach the rule as written on her bottle
SOURCE CHECK St. John's wort is also on the avoid list — but for the opposite reason: it induces CYP3A4 and can make the statin less effective. Both get avoided; the mechanisms are mirror images
Other interaction partners that raise myopathy risk: fibrates (especially gemfibrozil), certain macrolide antibiotics, azole antifungals, cyclosporine, amiodarone

🧠 “Grapefruit GROWS the dose. Wort WASHES it away.” Grapefruit blocks the drain (drug piles up, muscles hurt); St. John's wort opens the drain wide (drug leaves, LDL creeps back).

⚠️ The rest of the statin cautions

Caution	What to do about it
Pregnancy & breastfeeding	Standard nursing teaching is to avoid statins in pregnancy and to use reliable contraception; a client planning pregnancy should talk to her provider before stopping or continuing. Cholesterol is needed for fetal development.
New-onset diabetes / ↑ A1c	A small, real effect. It does not outweigh the cardiovascular benefit — monitor glucose, don't stop the statin on your own.
Alcohol & liver disease	Limit alcohol; caution in active hepatic disease.
Kidney disease	Raises myopathy risk; some statins need dose adjustment — a pharmacy check, not a nursing guess.
“I feel fine, can I stop?”	No — high cholesterol has no symptoms. Stopping lets LDL rebound and destabilizes the plaque cap. This is a lifelong therapy conversation.
Combination with fibrates	Real but manageable risk — the client needs explicit muscle-symptom teaching and follow-up.

🧠 “STAT” for the statin watch-list: Sore muscles · Toxic liver (ALT/AST) · Avoid grapefruit (& St. John's wort) · Take at night. Four letters, the entire caution card.

🗣️

TEACH

STEP 4 · WHAT SHE TAKES HOME

Timing, expectations, and the three exam questions that are really the same question.

🌙 Why statins are taken at night

🌙 The liver makes most of its cholesterol overnight — HMG-CoA reductase activity peaks in the night/early morning hours
💊 So the short-acting statins — simvastatin, lovastatin, fluvastatin — are taken in the evening (dinner or bedtime) so the drug level peaks when the enzyme is busiest
🍽️ Lovastatin is specifically taken with the evening meal — food improves its absorption
☀️ Long-acting statins — atorvastatin and rosuvastatin — can be taken at any time of day, because their effect lasts a full 24 hours
⏰ The best time is the time she'll actually remember — consistency beats theory

SOURCE CHECK “Always take a statin at night” is a useful default and it's what most nursing sources teach — but it's strictly true only for the short-acting statins. Know both halves.

🧠 “The liver works the night shift.” Send the statin in to clock out the night-shift enzyme. Long-acting statins (atorva/rosuva) work all 24 hours, so they don't care what time she takes them.

📝 The exam questions — all three are the same question

Source	Question	Answer
ATI	“Patient on lovastatin — when would the nurse notify the HCP?”	Muscle aches & cramps
HESI	“Which teaching is essential?”	“Report muscle pain & tenderness without injury”
Kaplan	“Which statement shows understanding?”	“Report NEW muscle tenderness to the HCP”

NCLEX wording to recognize: “muscle cramps” · “muscle spasms” · “muscle aches” · “muscle tenderness” · “weakness” · “dark urine.” Any of them = report.

🧠 Three testing companies, one answer: THE MUSCLES. If a statin appears in a question and one option mentions muscles, look there first.

✅ Teaching checklist — say it in her words

💊 Take it every day, even feeling fine — high cholesterol has no symptoms
🌙 Evening dose for short-acting statins; any time for atorvastatin/rosuvastatin
💪 Call for new muscle pain, weakness or dark urine
💛 Call for yellow skin/eyes, clay-colored stools, RUQ pain, unusual fatigue
🍊 No grapefruit · avoid St. John's wort · limit alcohol
🤰 Tell the provider if she's pregnant or planning to be
🥗 Keep the diet & exercise going — the drug does not replace them
🧪 Keep lab appointments — lipids, liver enzymes, CK if symptomatic
💊 Bring the full med list to every visit — interactions are the main danger

🧠 “Every night, no grapefruit, call if it hurts.” If she can repeat those nine words back, the teaching landed.

🗣️ Class-specific one-liners

💊 Sequestrants: “Take your other pills 1 hour before or 4 hours after this one, and expect constipation — fluids and fiber.”
💊 Niacin: “Your face may flush and burn. Take aspirin ~30 min before if approved, skip alcohol and hot drinks, and it fades over time.”
💊 Fibrates: “Report right-upper-belly pain — gallstones. And tell me about any muscle pain, especially since you're also on a statin.”
💊 Ezetimibe: “Usually easy to tolerate — but muscle pain still gets reported.”
💉 PCSK9: “It's a shot every 2–4 weeks. Keep it in the fridge, let it warm to room temperature, rotate sites.”

🧠 One signature per drug: Sequestrant = spacing · Niacin = flushing · Fibrate = gallbladder · Ezetimibe = easy · PCSK9 = fridge + needle.

⚡

QUICK RECALL

SAY IT OUT LOUD

💊 Statin = block the liver enzymeHMG-CoA reductase. Biggest LDL drop + stabilizes the plaque cap.

💪 Muscle pain → HCPMyalgia → myopathy → rhabdo → dark cola urine + AKI. Check CK.

🧪 200 · 150 · 100 · 40Total ≤200 · Trigs ≤150 · LDL ≤100 · HDL ≥40

🗂️ Match drug to numberLDL→statin · TG→fibrate · HDL→niacin · huge LDL→PCSK9 SubQ

🎯 Cover & check — 8 rapid-fire questions

Q1: How does a statin lower cholesterol?

It prevents cholesterol production in the liver by blocking the enzyme the liver needs — HMG-CoA reductase. Less made inside → more LDL receptors → LDL pulled out of the blood.

Q2: The client on lovastatin reports new leg aches with no injury. Action?

Notify the HCP. Muscle pain/tenderness/cramps without injury can signal myopathy and possible rhabdomyolysis — expect a CK level, and ask about dark, cola-colored urine and weakness.

Q3: Why no grapefruit?

Grapefruit inhibits CYP3A4, the enzyme that clears simvastatin, lovastatin and atorvastatin. The statin builds up and myopathy/rhabdo risk goes up. Pravastatin and rosuvastatin aren't CYP3A4-dependent.

Q4: Why take the statin in the evening?

The liver makes most of its cholesterol overnight, so the short-acting statins (simvastatin, lovastatin, fluvastatin) are dosed at dinner or bedtime. Atorvastatin and rosuvastatin last 24 hours and can be taken any time.

Q5: Which class is best for very high triglycerides?

Fibrates (gemfibrozil, fenofibrate). Watch for gallstones and for added myopathy risk when combined with a statin.

Q6: The client on cholestyramine also takes levothyroxine. What's the teaching?

Separate them — take other medications 1 hour before or 4 hours after the sequestrant, because it binds drugs and the fat-soluble vitamins A, D, E and K in the gut. Also expect constipation.

Q7: Client on niacin reports a hot, red, itchy face. Is this an allergy?

No — it's the classic prostaglandin-mediated flushing. Aspirin about 30 minutes before (if approved), avoid alcohol and hot beverages around the dose, consider extended-release, and reassure that it lessens over time.

Q8: Nystatin vs "-statin"?

Nystatin is an ANTIFUNGAL for yeast infections such as oral thrush — nothing to do with cholesterol. The "-statin" suffix drugs lower cholesterol.