Omega-3 (Fish Oil): uses, side effects & brands

Written & medically reviewed by Dr. Sanjay Anbu, MBBS · Last reviewed 5 November 2026

Omega-3 fatty acids support heart health and can lower high triglycerides. It belongs to the Vitamin & supplement group. Supplements correct deficiencies and support health when diet or absorption falls short.

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Drug type — dosing is set by your doctor

Measure	Range
Drug class	Vitamin & supplement
Type	Prescription
Dose	Individual — ask your doctor or pharmacist

What it is used for

Lowering high triglycerides (blood fats)
Part of heart-health care alongside diet and other medicines
Supplement for people who eat little oily fish

Common brand names

India: Maxepa, Seven Seas, Omega
Worldwide: (fish-oil/omega-3 brands)

Common side effects

Fishy aftertaste or burps
Indigestion or nausea
Loose stools

Before taking it — precautions

Tell your doctor about any fish or shellfish allergy
Blood thinners (warfarin, aspirin, clopidogrel) — omega-3 may slightly increase bleeding
Prescription-strength omega-3 has been linked to a higher chance of irregular heartbeat (atrial fibrillation) in some people

When to see a doctor urgently

Fast, irregular or pounding heartbeat
Unusual bleeding or bruising
Rash, swelling of the face or difficulty breathing (urgent)

Not a prescription — no dose shown. The right dose of omega-3 depends on age, weight, kidney/liver function and the condition, so MedDroid does not show a dose here. Always get your dose from a doctor or pharmacist and the leaflet inside the pack. General educational information only.

Frequently asked questions

Can fish oil replace my cholesterol tablet?

No — omega-3 mainly lowers triglycerides and does not replace statins for lowering LDL cholesterol or heart risk.

How can I reduce fishy burps?

Taking it with a meal often helps. Tell your doctor if stomach upset continues.

Is cod liver oil the same?

Not exactly — cod liver oil also contains vitamins A and D, so taking a lot can cause too much vitamin A. Avoid high amounts in pregnancy.

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Sources & further reading

Reviewed by Dr. Sanjay Anbu, MBBS. MedDroid is an AI medical assistant and can make mistakes. It provides general health information, not a diagnosis or medical advice — always consult a qualified clinician. In an emergency, contact your local emergency number immediately.