I took fish oil daily for over five year

PASS.

If right now anyone in the house has chest pain or pressure, is suddenly short of breath, faints, cannot be woken, is confused, has a fit, or is bleeding that will not stop — call your local emergency number now.

Then, the short answer: yes, fish oil can cause side effects, and for most healthy people the evidence that the capsule beats eating fish is thin. Your own experiment is worth taking to a pharmacist — "I took it for years, I stopped, and my head felt clearer" is exactly the sentence that makes a medication review useful.

Tonight, about 20 minutes, one basket:

1. Put every bottle, box and pouch — prescriptions, vitamins, everything — into one basket or bag. Include the "just in case" ones.
2. Take one photo of each label, back to front, so the writing is readable. That's your backup list.
3. Write three lines: what you stopped, when, what you noticed afterwards. Keep it with the bag.
4. Do not restart anything on your own, and don't change any prescribed medicine while you review this.

Nothing here is a diagnosis, and I'm not changing anything on your medication list — that call belongs to your pharmacist or clinician.

1. What you already tried, and what works better

Several "harmless" supplements at once — the part to change. The problem isn't that one pill is poisonous; it's that you can't tell which one is doing what. When five things start or stop at the same time, you learn nothing and lose the only clean signal you had.

Better: one at a time, one reason each. Your plan to stop one at a time is right. Add what makes it work — a one-line note on each bottle: *what I take this for, since when, what I noticed when I stopped*. A bottle with no answer to those lines is the one to ask about first.

Better: food before capsules. On the government supplement pages I checked today, the evidence for eating seafood is stronger than for the capsule for several conditions. Two fish meals in an ordinary week is a routine with no bottle, no cost, no decision. (Checked 2026-10-18.)

Better: fish liver oil is not fish oil. Liver oil also carries vitamins A and D, and the same pages note both can be toxic in large amounts, with amounts varying product to product. If a bottle says "cod liver oil" or "fish liver oil," put it at the top of the pharmacist list.

Better: the pharmacist conversation, as one appointment. Hand over the basket and ask four questions:

> 1. "Of everything in this bag, which are duplicates or overlapping?"
> 2. "Which interact with my prescribed medicines?"
> 3. "Which could explain the tiredness and fog I had?"
> 4. "Which can I restart, at what dose, and what should make me stop it?"

2. What to avoid

• Don't stack overlapping products. Ask the pharmacist to read the ingredient lists against each other — people often end up with the same thing in three bottles without knowing it.
• Don't start or stop anything based on the internet. If a forum or video gives you a dose, that's not a plan for you.
• Don't buy prescription-strength omega-3 or any prescription medicine online to replace a capsule, and don't borrow anyone else's.
• Don't change a prescribed medicine to "offset" a supplement. Keep taking prescribed medicines as prescribed until a clinician tells you otherwise.
• Careful with blood thinning and blood sugar. The official page I checked states omega-3 supplements may interact with medicines that affect blood clotting and may lengthen how long a cut takes to stop bleeding, and says people taking anticoagulants ("blood thinners") or anti-inflammatory painkillers should discuss omega-3 with a provider. (Checked 2026-10-18.)
• For the child, elder or sibling in your house: no supplement decisions from you. The same page says to consult a provider before giving a child an omega-3, and before use in pregnancy or nursing. Put their products in a separate basket and ask.
• Pregnancy/nursing, or a fish or shellfish allergy: "ask first, every time."

3. When to stop doing this yourself and get help

Same day — call your local emergency number: chest pain or pressure, sudden shortness of breath, fainting, confusion or difficulty waking, a fit, bleeding that won't stop. Don't drive them; call.

This week — pharmacist or clinician, not a forum: the basket review itself; anything that bleeds easily or bruises unusually; a pulse that feels fast, irregular, or fluttering at rest; new leg swelling; any supplement you've been on for years now alongside a new prescription; anything you can't identify from the label.

Who actually benefits: the official pages describe the clearest case as people who already have heart disease or high triglycerides, and the strongest case as eating seafood rather than swallowing capsules. For mood, attention and general energy, the reviews describe the evidence as uncertain or low quality — which fits what you felt when you stopped. Prescription-strength omega-3 products are a different, regulated thing with different rules from a supplement capsule; that's a conversation with a prescriber, not something to buy yourself.

I can only go so far: I don't diagnose, I don't change medicines, and I can't tell you whether your fog had one cause or several — that's what the review is for. A pharmacist or your own clinician decides whether anything goes back on the shelf.

Success in 24 hours

Not a cure — a clearer shelf:

• One basket, everything in it, photographed.
• One page: what you stopped, when, what changed.
• One appointment asked for, with the four questions in hand.
• One fish meal cooked that someone in the house will actually eat.

If in a week you can say out loud what you take and why — and know which one to ask about first — the review did its job.

Sources checked 2026-10-18: U.S. National Center for Complementary and Integrative Health (NCCIH), "Omega-3 Supplements: What You Need To Know" and "5 Things To Know About Omega-3s for Heart Disease", nccih.nih.gov.