Prescription omega-3 ethyl esters

About Prescription omega-3 ethyl esters

Purified EPA and DHA converted to ethyl esters, licensed as prescription medicines for severely elevated triglycerides and, in one case, for cardiovascular risk reduction. Chemically the same fatty acids as a fish oil supplement, at a regulated dose and purity.

This is the one corner of the supplement world that went through drug regulation, and the contrast is instructive. Prescription preparations state exactly how much EPA and DHA are in each gram — typically 465 mg EPA plus 375 mg DHA for the mixed product, or about 998 mg EPA for the purified EPA drug — are manufactured to pharmaceutical standards, and were approved on trial evidence at 4 g/day. That dose is roughly ten to thirteen standard fish oil softgels. Buying an over-the-counter concentrate is not the same intervention as being prescribed one, and the difference is dose, purity and oversight rather than the molecule.

Sold as

Prescription softgel, Ethyl ester concentrate

Standardised to

Pharmaceutical assay of EPA and DHA content per gram — a product without this marker may not resemble what was studied.

Also known as

Omega-3-acid ethyl esters, Icosapent ethyl, Ethyl-EPA, Ethyl-DHA

Regulation: Approved as prescription drugs in the US and EU — omega-3-acid ethyl esters for triglycerides above 500 mg/dL, and icosapent ethyl additionally for cardiovascular risk reduction in specified high-risk groups. One preparation, omega-3 carboxylic acids, was withdrawn after its outcome trial was stopped for futility. Prescription and over-the-counter products are not interchangeable and only the prescription versions carry approved indications.

What the research used

The amounts, forms and durations published trials of Prescription omega-3 ethyl esters actually administered.

When it was taken

Each window says whether a trial compared it against an alternative, or whether it is convention and pharmacology. Most timing advice is the second kind.