Blog

Supplements and Blood Thinners: What to Ask a Pharmacist

Quick answer

Supplements and blood thinners can interact. FDA says ginkgo, warfarin, aspirin and vitamin E can each thin the blood, and taking them together may raise the risk of internal bleeding or stroke. St. John's wort can also affect warfarin. Ask a pharmacist before you start, and keep taking your prescription.

By the MemoPryl label deskUpdated October 19, 2026 · 4 min read

MemoPryl bottle, Advanced Formula label, 60 capsules — The bottle with label B (Advanced Formula, 60 capsules). The image prints no blood thinner warning.

Can you take supplements with blood thinners?

Only after a pharmacist or doctor checks. Some supplements add to blood thinning and others change how a blood thinner works.

FDA says ginkgo biloba, warfarin, aspirin and vitamin E can each thin the blood, and taking them together may increase the risk of internal bleeding or stroke (FDA, Mixing Meds and Supplements). NCCIH says ginkgo may raise bleeding risk in people taking anticoagulants such as warfarin (NCCIH, Ginkgo).

St. John's wort goes the other way. NCCIH lists warfarin among the medicines it can weaken (NCCIH, St. John's Wort safety).

Supplements to flag if you take a blood thinner
Supplement	Concern
Ginkgo	Adds to blood thinning; bleeding case reports (MSK, Ginkgo)
Vitamin E	Can thin the blood (FDA, Mixing Meds and Supplements)
St. John's wort	Can weaken warfarin (NCCIH, St. John's Wort safety)

What should I ask a pharmacist?

Ask about each ingredient by name, ask what to watch for, and ask what to do if something changes.

Is each ingredient safe with my medicine?

Name the blood thinner and bring the bottle.

What signs should I watch for?

Ask about unusual bruising, bleeding gums or dark stools.

Who do I call if I notice them?

Get a number and know when to use emergency care.

Keep taking your blood thinner exactly as directed. Never skip or change a dose on your own to fit a supplement. If you have surgery coming, the team may ask you to stop supplements two to three weeks before (FDA, Mixing Meds and Supplements).

Does this affect MemoPryl?

It can. Ginkgo and St. John's wort are both among the six ingredient names tied to MemoPryl on a sibling pack.

That list is unconfirmed for the bottle you receive, and no amounts are printed on any image we have. The bottle is the source of truth. If you take warfarin or another blood thinner, show it to your pharmacist before the first capsule.

Thinking about MemoPryl?Check your medicines with a pharmacist first. The checkout confirms prices and the 60-day window.

Middle pack

3 bottles

Not listed on the packNot listed on the pack a bottle · Not listed on the pack

Get 3 bottles

Largest pack

6 bottles

Not listed on the packNot listed on the pack a bottle · Not listed on the pack

Get 6 bottles

Until the seller confirms its list, prices stay as fill-in fields. The checkout shows the final total.

Three MemoPryl bottles — Three bottles with label B. No blood thinner guidance is printed in the image.

MemoPryl: capsules in 2, 3 or 6 bottlesRead the bottle · check medicines first · 60-day window (confirm)

See packs

When is bleeding an emergency?

Call emergency services for bleeding that will not stop, a sudden severe headache, or stroke-like symptoms. FDA lists bleeding and stroke-like symptoms among serious reactions to report (FDA, Report a Supplement Problem).

For milder signs such as new bruising, call your pharmacist or doctor the same day. This post is general information and does not replace their advice. More at the medicine guide.

FAQ01

Questions people ask about MemoPryl

Does ginkgo thin the blood?

It may. FDA says ginkgo can thin the blood, and NCCIH says it may raise bleeding risk in people on anticoagulants. If you take a blood thinner, ask a pharmacist before using any product with ginkgo.

Does St. John's wort affect warfarin?

Yes. NCCIH lists warfarin among the medicines St. John's wort can weaken. A weaker blood thinner is a safety problem, so tell your clinician if you use or plan to use the herb.

Is it okay to take aspirin with a supplement?

Ask first. FDA says aspirin, ginkgo, warfarin and vitamin E can each thin the blood, and taking them together may raise bleeding risk. A pharmacist can tell you what fits your situation.

Who wrote this02

Written and reviewed by

Written byThe MemoPryl label deskMemopryl.cc, MemoPryl USA retail

Each page draws on the bottle images, the seller's product notes and linked NIH, FDA, FTC and peer-reviewed sources.

Medically reviewed byDr. Neelum Aggarwal, MD, PhysicianRole: Medical reviewerReview date: October 19, 2026

Last updated October 19, 2026. See our editorial standards and how we check reviews. This website is run by MemoPryl USA retail, not by the manufacturer or the distributor of the bottle. We are paid a commission when you buy through our order links.

Keep reading

Ready to look at MemoPryl?

Read the bottle you receive and go over your medicines with a pharmacist before you pick a pack. The checkout confirms prices and the guarantee terms.

2 bottlesNot listed on the packNot listed on the pack a bottle 3 bottlesNot listed on the packNot listed on the pack a bottle Largest pack6 bottlesNot listed on the packNot listed on the pack a bottle

Order MemoPryl Compare packs

Order desk: +1 (302) 200-3480
60-day window (confirm at checkout)
Ships from the U.S. unless the checkout says otherwise

Three MemoPryl bottles with navy caps and gold-edged name panels