Official websiteGuide
Nerve Supplements and Medicines: Blood Thinners, Turmeric and Warfarin
A nerve supplement and medicine can interact, so check before you combine them. Turmeric and warfarin is the best known pair: sources say not to take turmeric supplements with warfarin or other blood thinners. Nervecept capsules list 8 lines, including 50 mg of turmeric, and contain shellfish. Ask your pharmacist first.
Written by the Nervecept label deskUpdated
The basics01
Can a nerve supplement interact with your medicine?
Yes, a nerve supplement can interact with your medicine. The NIH Office of Dietary Supplements says supplements can interact with medicines, and gives warfarin as an example (NIH ODS, Dietary Supplements consumer sheet).
NCCIH adds that some supplements may raise bleeding risk before surgery, and that you should tell your providers about everything you take (NCCIH, Using Supplements Wisely).
A supplement is not tested by the FDA before sale. Companies are responsible for safety and truthful labels, and the FDA acts after a product is on the market (FDA, Q&A on Dietary Supplements).
That puts the checking on you, your pharmacist and your doctor. The pages below turn that into a short routine.
Blood thinners02
Is turmeric safe with warfarin or other blood thinners?
No, not without medical advice. Memorial Sloan Kettering tells patients not to take turmeric supplements with warfarin or other blood thinners (MSK, Turmeric).
The reason is bleeding. Lab studies and a case report suggest turmeric can raise bleeding risk (MSK, Turmeric). Each Nervecept capsule lists 50 mg of turmeric root. We found no verified dose source for that amount, so we cannot call it too small to matter.
Turmeric is not the only line with a note. Glucosamine and chondroitin have been linked to more bleeding in people on warfarin (NCCIH, Glucosamine and Chondroitin) (Mayo Clinic, Glucosamine). Boswellia may affect platelets (MSK, Boswellia). A man on stable warfarin had a raised INR after starting quercetin (MSK, Quercetin). Each case is small, but together they explain the label's advice to ask a physician first.
The capsule also lists methionine, MSM and bromelain. We found no authoritative interaction source for MSM or bromelain, which is a gap in our knowledge, not a clearance.
Line by line03
Which Nervecept ingredients carry medicine or health notes?
Five of the eight Nervecept lines carry a medicine or health note in the sources we read. Three have either no note or no source.
| Line (per capsule) | Note | Source |
|---|---|---|
| Glucosamine sulfate 500 mg | May raise blood glucose in some people; shellfish allergy concern; warfarin bleeding risk | (NCCIH, Glucosamine and Chondroitin) (Mayo Clinic, Glucosamine) (MSK, Glucosamine) |
| Indian frankincense 67 mg | May raise bleeding risk with blood thinners | (MSK, Boswellia) |
| Chondroitin sulfate 50 mg | Linked to more bleeding on warfarin | (NCCIH, Glucosamine and Chondroitin) (Mayo Clinic, Glucosamine) |
| Turmeric 50 mg | Bleeding risk; rare liver injury reports | (NCCIH, Turmeric) (MSK, Turmeric) (LiverTox, Turmeric) |
| Quercetin 8 mg | Raised INR in a warfarin patient; avoid with some drugs | (MSK, Quercetin) |
| Methionine 8 mg | Ask a provider before any supplement | (Cleveland Clinic, Amino Acids) |
| MSM 8 mg | No authoritative source found | None |
| Bromelain 8 mg | No authoritative source found | None |
Diabetes medicines04
Can glucosamine affect blood sugar or diabetes medicine?
Glucosamine may raise blood glucose in some people, according to NCCIH (NCCIH, Glucosamine and Chondroitin). Nervecept is built on it: 500 of its 699 mg.
MSK also advises people with diabetes to talk to their provider, because glucosamine may worsen the condition (MSK, Glucosamine). If you use insulin or tablets for blood sugar, ask whether this matters for you and whether to check your numbers more often.
Do not change a diabetes medicine on your own. NCCIH says not to replace medical diabetes treatment with an unproven product (NCCIH, Diabetes and Dietary Supplements). Our guide to foot care covers the habits that do have sources behind them.
Nervecept: from $49 a bottle30 capsules · 2, 3 or 6 bottles · free US shipping on 3 and 6 · 60-day money-back guarantee
See packsAllergy05
Is Nervecept safe with a shellfish allergy?
No, not unless your doctor agrees. The label says "Contains: Shellfish (Crayfish)".
Glucosamine can come from shellfish shells, and Mayo Clinic notes a concern about allergic reactions in people with shellfish allergy (Mayo Clinic, Glucosamine). MSK says to talk to a provider first (MSK, Glucosamine). We never describe Nervecept as shellfish-free, because it is not.
Other groups the label names for a physician check: pregnant or nursing mothers, children under 18 and anyone with a known medical condition.
Liver06
Can turmeric supplements affect the liver?
Rarely, yes. LiverTox describes turmeric as a well-documented cause of clinically apparent liver injury, although the incidence is unknown and probably very low (LiverTox, Turmeric).
Onset is typically 1 to 4 months after starting, and most cases resolve within 1 to 3 months of stopping (LiverTox, Turmeric). Cases are tied mostly to high-absorption products made with piperine or lipid nanoparticles (LiverTox, Turmeric). The Nervecept label lists plain turmeric root, 50 mg, and no absorption booster.
NCCIH lists warning signs: fatigue, nausea, poor appetite, dark urine and jaundice. If they appear, stop the product and speak with a provider (NCCIH, Turmeric).
Keep taking prescribed medicine exactly as directed. Never stop or change it because of a supplement, and see a doctor for new, spreading or worsening numbness or weakness.
What to do07
What should you ask your pharmacist before taking a nerve supplement?
Show the pharmacist the Supplement Facts panel and ask whether any line conflicts with your medicines. It takes five minutes.
Bring the label
Show all eight lines with amounts. See the supplement facts for a typed copy.
List your medicines
Include blood thinners, diabetes drugs, acid reducers and anything over the counter.
Ask three questions
Does anything raise bleeding risk? Could it change my blood sugar? Should my INR be checked?
Tell every provider
NCCIH advises sharing everything you take, including before surgery (NCCIH, Using Supplements Wisely).
Report problems
Reactions can be reported to the FDA through MedWatch (FDA, MedWatch).
The side effects guide lists what to watch for. If you and your clinicians agree to try Nervecept, the label directs one capsule a day with 8 oz of water.
FAQ08
Supplements and medicines questions
Can I take turmeric if I am on warfarin?
Not without asking your prescriber. MSK says patients should not take turmeric supplements with warfarin or other blood thinners, because of bleeding risk (MSK, Turmeric). A pharmacist can check your exact medicines.
Do supplements affect blood test results?
Some do. High biotin intake can skew lab tests, including thyroid tests (NIH ODS, Biotin). Tell your doctor and the lab about every supplement before a blood draw, so results are read in context.
Does glucosamine raise blood sugar?
It may in some people, according to NCCIH (NCCIH, Glucosamine and Chondroitin). If you have diabetes, ask your provider before using a glucosamine product such as Nervecept, which lists 500 mg per capsule, and ask whether to monitor more often.
Which supplements interact with warfarin?
Several can. Glucosamine, chondroitin, boswellia, turmeric and quercetin each carry a bleeding or INR note in the sources we read (NCCIH, Glucosamine and Chondroitin) (MSK, Boswellia) (MSK, Turmeric) (MSK, Quercetin). Vitamin K also matters (NIH ODS, Dietary Supplements consumer sheet). Ask a pharmacist about your full list.
Should I stop supplements before surgery?
Ask your surgeon. NCCIH says some supplements may increase bleeding risk before surgery and that you should tell your providers about every supplement (NCCIH, Using Supplements Wisely). Do not decide alone.
Are supplements checked by the FDA before sale?
No. The FDA cannot approve dietary supplements before they are marketed, and it is largely limited to action after sale (FDA, Q&A on Dietary Supplements). Makers and distributors carry the first responsibility for safety.
Can a supplement contain hidden drugs?
Rarely, but it has happened. NCCIH says the FDA has found prescription drugs, including warfarin, in products sold as supplements (NCCIH, Using Supplements Wisely). Buy from the brand's sales page and report odd effects through MedWatch (FDA, MedWatch).
Who wrote this09
Written and reviewed by
Pages built from the label, the sales page and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . See our editorial standards and how we check reviews. This website is run by a licensed U.S. retail desk for Nervecept, not by the manufacturer or the distributor. We are paid a commission when you buy through our order links.
Keep reading
More about Nervecept
Licensed U.S. retail desk for Nervecept
Ready to try Nervecept?
Check your medicines and the shellfish line first, then pick a pack. Six bottles cost the least per bottle; three and six ship free in the US; every pack carries the 60-day money-back guarantee.
- Secure checkout on the sales page
- 60-day money-back guarantee
- Ships from the U.S.