Medical emergency? Call 911. · Educational portal — not medical or legal advice · Disclaimer

Prescriptions.plus · Rx home delivery & workers' comp education

Create free account — discounts & rewards

Medication guide

Omega-3-acid ethyl esters: uses, appearance and warnings

What the official FDA label says Omega-3-acid ethyl esters is used for, what it looks like, and its most important warnings — in plain English, with the label text one click away.
Prescription label

Uses

What the official label says Omega-3-acid ethyl esters is used for

Omega-3-acid ethyl esters is a prescription capsule made mainly of the omega-3 fatty acids EPA and DHA, which come from fish oil.

The label says it is used along with diet to lower triglyceride (a type of blood fat) levels in adults with severe hypertriglyceridemia (very high triglycerides). The label says patients should be on a lipid-lowering diet before and during treatment.

The label says its effect on the risk of pancreatitis and on heart-related death and illness has not been determined.

Read the label's “Indications and usage” section (verbatim)
Omega-3-acid ethyl esters capsules, are indicated as an adjunct to diet to reduce triglyceride (TG) levels in adult patients with severe (greater than or equal to 500 mg per dL) hypertriglyceridemia. Usage Considerations: Patients should be placed on an appropriate lipid-lowering diet before receiving omega-3-acid ethyl esters capsules and should continue this diet during treatment with omega-3-acid ethyl esters capsules. Laboratory studies should be done to ascertain that the lipid levels are consistently abnormal before instituting therapy with omega-3-acid ethyl esters. Every attempt should be made to control serum lipids with appropriate diet, exercise, weight loss in obese patients, and control of any medical problems such as diabetes mellitus and hypothyroidism that are contributing to the lipid abnormalities. Medications known to exacerbate hypertriglyceridemia (such as beta blockers, thiazides, estrogens) should be discontinued or changed if possible prior to consideration of TG-lowering drug therapy. Limitations of Use: The effect of omega-3-acid ethyl esters capsules on the risk for pancreatitis has not been determined. The effect of omega-3-acid ethyl esters capsules on cardiovascular mortality and morbidity has not been determined. Omega-3-acid ethyl esters capsules are combination of ethyl esters of omega 3 fatty acids, principally eicosapentaenoic acid (EPA) and docosahexaenoic acid (DHA), indicated as an adjunct to diet to reduce triglyceride (TG) levels in adult patients with severe (≥ 500 mg/dL) hypertriglyceridemia. (1) Limitations of Use: The effect of omega-3-acid ethyl esters capsules on the risk for pancreatitis has not been determined. (1) The effect of omega-3-acid ethyl esters capsules on cardiovascular mortality and morbidity has not been determined. (1)

Names & forms

Brand names, forms and strengths

Brand names (from RxNorm; not every brand is still sold): Lovaza.

Generic name: omega-3-acid ethyl esters · RxNorm ID (RxCUI): 484348

Forms and strengths of Omega-3-acid ethyl esters listed in RxNorm
FormStrengths listed in RxNorm
Oral Capsule3 acid ethyl esters (USP) 1000 MG

Strengths are listed so you can recognise a product — not as dosing information. Only your prescriber can decide what is right for you.

Read the label's “Dosage forms and strengths” section (verbatim)
Omega-3-acid ethyl esters capsules, USP are supplied as 1-gram clear, natural colored oblong shaped soft gelatin capsules containing pale yellow colored oily liquid imprinted with '740'. Capsules: 1 gram (3)

Appearance

What Omega-3-acid ethyl esters looks like

Illustration: pale yellow capsule capsule, imprint 740740

omega-3-acid ethyl esters 900 mg
Strides Pharma Science Limited

Illustration: Clear to light yellow oval capsule, liquid filled, imprint AT132AT132

omega-3-acid ethyl esters 1 g
Camber Pharmaceuticals, Inc.

Illustration: light to pale yellow oval capsule, liquid filled, imprint LS 423LS 423

omega-3-acid ethyl esters 1 g
Lifestar Pharma LLC

Illustration based on label data — not a photo; appearance varies by manufacturer. Confirm with your pharmacist.
Appearance of Omega-3-acid ethyl esters products from DailyMed product data
StrengthFormColourShapeSizeImprintScoreLabeler
omega-3-acid ethyl esters 900 mgcapsuleyellow“pale yellow”capsule24 mm7401Strides Pharma Science Limited
omega-3-acid ethyl esters 1 gcapsule, liquid filledyellow“Clear to light yellow”oval24 mmAT1321Camber Pharmaceuticals, Inc.
omega-3-acid ethyl esters 1 gcapsule, liquid filledyellow“light to pale yellow”oval24 mmLS · 4231Lifestar Pharma LLC

From the product data in each manufacturer's label on DailyMed. Many companies make Omega-3-acid ethyl esters, so your medicine may look different from any shown here. If a pill looks unfamiliar, ask your pharmacist before taking it.

Read the label's “How supplied” section (verbatim)
Omega-3-Acid Ethyl Esters Capsules, USP are supplied as 1-gram clear, natural colored oblong shaped soft gelatin capsules containing pale yellow colored oily liquid imprinted with '740' Bottles of 120: NDC 64380-761-11 Blister card of 10's: NDC 64380-761-01 Carton of 50 capsules containing 5 blister cards of 10 capsules per blister card: NDC 64380-761-02 Store at 20° to 25°C (68° to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) Protect from light. [See USP Controlled Room Temperature]. Do not freeze. Keep out of reach of children.

Safety

Important warnings for Omega-3-acid ethyl esters

In plain English, the label's key warnings include:

  • The label says liver enzyme levels should be checked from time to time in people with liver impairment.
  • This medicine may raise LDL (bad) cholesterol in some people, so LDL levels should be checked periodically.
  • The label advises caution in people with known allergies to fish or shellfish.
  • There may be a link between this medicine and more frequent episodes of atrial fibrillation or flutter (irregular heart rhythms) in people who already have these conditions, especially in the first months of treatment.
  • Omega-3 acids may lengthen bleeding time, so people also taking blood thinners or anti-platelet medicines should be monitored.
Contraindications — who should not use it (verbatim)
Omega-3-acid ethyl esters capsules are contraindicated in patients with known hypersensitivity (e.g., anaphylactic reaction) to omega-3-acid ethyl esters capsules or any of its components. Omega-3-acid ethyl esters capsules are contraindicated in patients with known hypersensitivity (e.g., anaphylactic reaction) to omega-3-acid ethyl esters capsules or any of its components. (4)
Warnings and precautions (verbatim excerpt)
In patients with hepatic impairment, monitor ALT and AST levels periodically during therapy. (5.1) Omega-3-acid ethyl esters capsules may increase levels of low-density lipoprotein (LDL). Monitor LDL levels periodically during therapy. (5.1) Use with caution in patients with known hypersensitivity to fish and/or shellfish. (5.2) There is a possible association between omega-3-acid ethyl esters capsules and more frequent recurrences of symptomatic atrial fibrillation or flutter in patients with paroxysmal or persistent atrial fibrillation, particularly within the first months of initiating therapy. (5.3) 5.1 Monitoring: Laboratory Tests In patients with hepatic impairment, alanine aminotransferase (ALT) and aspartate aminotransferase (AST) levels should be monitored periodically during therapy with omega-3-acid ethyl esters capsules. In some patients, increases in ALT levels without a concurrent increase in AST levels were observed. In some patients, omega-3-acid ethyl esters capsules increase low-density lipoprotein cholesterol (LDL-C) levels. LDL-C levels should be monitored periodically during therapy with omega-3-acid ethyl esters. Laboratory studies should be performed periodically to measure the patient's TG levels during therapy with omega-3-acid ethyl esters. 5.2 Fish Allergy Omega-3-acid ethyl esters capsules contains ethyl esters of omega-3 fatty acids (EPA and DHA) obtained from the oil of several fish sources. It is not known whether patients with allergies to fish and/or shellfish, are at increased risk of an allergic reaction to omega-3-acid ethyl esters capsules. Omega-3-acid ethyl esters capsules should be used with caution in patients with known hypersensitivity to fish and/or shellfish. 5.3 Recurrent Atrial Fibrillation (AF) or Flutter In a double-blind, placebo-controlled trial of 663 subjects with symptomatic paroxysmal AF (n = 542) or persistent AF (n = 121), recurrent AF or flutter was observed in subjects randomized to omega-3-acid ethyl esters who received 8 grams/day for 7 days and 4 grams/day thereafter for 23 weeks at a higher rate relative to placebo. Subjects in this trial had median baseline TG levels of 127 mg/dL, had no substantial structural heart disease, were taking no anti-arrhythmic therapy (rate control permitted), and were in normal sinus rhythm at baseline. At 24 weeks, in the paroxysmal AF stratum, there were 129 (47%) first recurrent symptomatic AF or flutter events on placebo and 141 (53%) on omega-3-acid ethyl esters (primary endpoint, HR: 1.19; 95% CI: 0.93, 1.35). In the persistent AF stratum, there were 19 (35%) events on placebo and 34 (52%) events on omega-3-acid ethyl esters (HR: 1.63; 95% CI: 0.91, 2.18). For both strata combined, the HR was 1.25; 95% CI: 1.00, 1.40. Although the clinical significance of these results is uncertain, there is a possible association between omega-3-acid ethyl esters and more frequent recurrences of symptomatic AF or flutter in patients with paroxysmal or persistent AF, particularly within the first 2 to 3 months of initiating therapy. Omega-3-acid ethyl esters capsules are not indicated for the treatment of AF or flutter.
Side effects — opening of the label's adverse reactions section
The most common adverse reactions (incidence >3% and greater than placebo) were eructation, dyspepsia and taste perversion. (6) To report SUSPECTED ADVERSE REACTIONS, contact Strides Pharma, Inc. at 1-877-244-9825 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot be directly compared with rates in the clinical trials of another drug and may not reflect the rates observed in practice. Adverse reactions reported in at least 3% of subjects treated with omega-3-acid ethyl esters capsules and at a greater rate than placebo based on pooled data across 23 clinical trials are listed in Table 1. Table 1. …
Drug interactions — opening of the label's section
Omega-3-acids may prolong bleeding time. Patients taking omega-3-acid ethyl esters capsules and an anticoagulant or other drug affecting coagulation (e.g., anti-platelet agents) should be monitored periodically. (7.1) 7.1 Anticoagulants or Other Drugs Affecting Coagulation Some trials with omega-3-acids demonstrated prolongation of bleeding time. The prolongation of bleeding time reported in these trials has not exceeded normal limits and did not produce clinically significant bleeding episodes. Clinical trials have not been done to thoroughly examine the effect of omega-3-acid ethyl esters and concomitant anticoagulants. Patients receiving treatment with omega-3-acid ethyl esters and an anticoagulant or other drug affecting coagulation (e.g., anti-platelet agents) should be monitored periodically.

This is not a complete list of warnings or side effects. Read the full label and talk to your prescriber or pharmacist. To report a side effect to the FDA, use MedWatch.

Resources

If you were hurt at work

Whether a medicine is right for you is a decision for your prescriber. If you were injured on the job, these educational guides explain the next steps and who can help.

FAQ

Omega-3-acid ethyl esters: frequently asked questions

+What is Omega-3-acid ethyl esters used for?

The label says omega-3-acid ethyl esters capsules are used along with diet to lower triglyceride levels in adults with severe hypertriglyceridemia. Their effect on pancreatitis risk and heart-related outcomes has not been determined.

+What are the most important warnings for Omega-3-acid ethyl esters?

The label warns that this medicine may raise LDL cholesterol and that liver enzymes should be checked in people with liver problems. It also advises caution with fish or shellfish allergies and notes a possible link to more episodes of atrial fibrillation or flutter.

+What side effects are listed on the Omega-3-acid ethyl esters label?

The label lists burping, indigestion, and a changed sense of taste as the most common side effects.

+Who should not take Omega-3-acid ethyl esters, according to the label?

The label says this medicine should not be used by people with a known allergy, such as an anaphylactic reaction, to omega-3-acid ethyl esters or any of its ingredients.

+What does Omega-3-acid ethyl esters look like?

Appearance depends on the manufacturer and strength. Examples from DailyMed product data: omega-3-acid ethyl esters 900 mg capsule from Strides Pharma Science Limited: pale yellow, capsule, imprint "740"; omega-3-acid ethyl esters 1 g capsule, liquid filled from Camber Pharmaceuticals, Inc.: Clear to light yellow, oval, imprint "AT132"; omega-3-acid ethyl esters 1 g capsule, liquid filled from Lifestar Pharma LLC: light to pale yellow, oval, imprint "LS 423". Your medicine may look different — always confirm with your pharmacist.

+Can Omega-3-acid ethyl esters be delivered to my home?

Many prescriptions can be filled by licensed mail-order pharmacies and delivered to your home; whether that is possible for a particular medicine depends on the medicine, your prescriber, your state and your coverage. Ask your prescriber or pharmacist. Our prescription delivery guide explains how home delivery generally works.

Sources

Label text is quoted from the Strides Pharma Science Limited label (label version effective September 2, 2026), retrieved October 20, 2026. Other manufacturers' labels for the same medicine may differ in wording.

The plain-English summaries were generated by software from the label text above and have not been reviewed by a clinician. If anything here differs from the label that came with your medicine, follow your label and your pharmacist.

Prescriptions.plus is an educational portal. We are not a pharmacy, law firm, medical provider, insurer or claims administrator, and nothing here is medical or legal advice. Educational purposes only. This page does not tell you whether to take a medicine or how much to take. Medical emergency? Call 911. Poison emergency: call Poison Control at 1-800-222-1222.

Sponsored

Featured products from our sponsors

Browse everything. Create a free account to see prices and member discounts.

Shop