Icosapent ethyl
Prescription omega-3 fatty acids
Prescription omega-3 fatty acids
A purified EPA (fish-oil) ethyl ester that lowers triglycerides and, with a statin, reduces heart attack and stroke in high-risk adults.
Also called: ethyl eicosapentaenoate, EPA ethyl ester
Quick facts
- Group
- Prescription omega-3 fatty acids
- Target
- Hepatic triglyceride and VLDL synthesis (no single protein target)
- Used for
- Severe hypertriglyceridaemia · To reduce heart attack
- Key effects
- Muscle or joint pain · Constipation
- Monitor
- Triglycerides and lipid profile · Signs of bleeding
No doses: the clinician sets them by the current guideline.
Mechanism of action
Icosapent ethyl is the ethyl ester of eicosapentaenoic acid (EPA), an omega-3 fatty acid; it contains no DHA. It lowers the liver's synthesis and secretion of triglyceride-rich VLDL and increases triglyceride clearance. Its effect on cardiovascular events seems larger than the triglyceride fall alone would predict; membrane, anti-inflammatory and antiplatelet effects are proposed.
- Absorbed and incorporated as EPA into cell membranes and lipids
- Liver makes and releases less VLDL
- Triglycerides fall without a rise in LDL
- Fewer cardiovascular events added to a statin
Indications
- Severe hypertriglyceridaemia, as an adjunct to diet
- To reduce heart attack, stroke and related hospitalizations in adults on a statin with raised triglycerides and heart disease or diabetes with other risk factors Atherosclerosis and dyslipidaemia →
Adverse effects
Common
- Muscle or joint pain
- Constipation
- Swelling of legs or ankles
Contraindications
- Hypersensitivity to icosapent ethyl or the capsule ingredients
Key interactions
- Anticoagulants and antiplatelet drugs
- Bleeding risk adds up; patients are watched for bleeding.
What is monitored
- Triglycerides and lipid profile
- Heart rhythm symptoms (palpitations, irregular pulse)
- Signs of bleeding
- Liver tests in liver disease
Administration and safety
- Oral capsules, twice a day with food.
- Swallowed whole: not broken, chewed, crushed or dissolved.
- Not interchangeable with over-the-counter fish oil supplements.
Pregnancy and breastfeeding
Data in pregnancy are limited; it is used only if the benefit is judged to outweigh the risk.
Nursing care
- Before: fish or shellfish allergy, anticoagulant or antiplatelet use, history of atrial fibrillation.
- During: ask about palpitations, dizziness, breathlessness and bleeding.
- Teach that diet and exercise remain part of treatment.
- Teach that store-bought fish oil is not a substitute.
Pharmacokinetics
- Absorption
- Oral, taken with food; the ester is converted to EPA during absorption.
- Metabolism
- EPA is broken down in the liver by beta-oxidation, like dietary fatty acids.
- Half-life
- Long: several days for EPA (label).
Test yourself
Think of the answer, then tap the question to see it.
What does icosapent ethyl contain, and how does it differ from mixed omega-3 products?
Only EPA ethyl ester, without DHA; mixtures with DHA can raise LDL, EPA alone seems not to.
Which heart rhythm problem is a warning with icosapent ethyl?
Atrial fibrillation or flutter.
Why is a patient on warfarin and icosapent ethyl watched closely?
Icosapent ethyl increases bleeding risk, which adds to the anticoagulant.
Connections
← Back to the class: Prescription omega-3 fatty acids
Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given.
Sources: Icosapent Ethyl: MedlinePlus Drug Information (MedlinePlus (U.S. National Library of Medicine), 2026); DailyMed - ICOSAPENT ETHYL capsule (DailyMed (U.S. National Library of Medicine), 2026).
Spotted a mistake?We are always improving for the community. Tell us what is wrong and our team will review it.Report a mistake
Representative model, for educational purposes only.