Side effects
Nervecept Side Effects: Is It Safe, and Who Should Be Careful?
Nervecept side effects have not been measured, because no trial of the capsule was found. The ingredients can cause stomach upset, allergy and, for some medicines, more bleeding. The label contains shellfish (crayfish). Anyone with an allergy, a blood thinner, diabetes, liver or kidney disease should ask a doctor or pharmacist first.
Written by the Nervecept label deskUpdated
Side effects01
What are the side effects of Nervecept?
The side effects of Nervecept are unknown as a rate, because no trial of the finished capsule exists. What we can report are the cautions published for each ingredient.
The most often reported are stomach upset, diarrhea and skin allergy, mainly from boswellia and bromelain (Tavakoli et al., Boswellia adverse events) (NCCIH, Bromelain). Glucosamine may raise blood sugar in some people and has been linked to more bleeding with warfarin (AFP, Glucosamine questions (Pirotta)) (NCCIH, Glucosamine and Chondroitin).
No source says these ingredients are free of risk. No supplement can honestly claim to have no side effects.
Four label lines are only 8 mg. Glucosamine is 500 mg of the 699 mg listed, so the shellfish and blood sugar cautions carry the most weight.
| Ingredient | Per capsule | Main caution |
|---|---|---|
| Glucosamine sulfate | 500 mg | Mostly shellfish-derived; may raise blood sugar; more bleeding with warfarin (AFP, Glucosamine questions (Pirotta)) |
| Indian frankincense | 67 mg | Stomach upset, skin allergy; little known in pregnancy (Tavakoli et al., Boswellia adverse events) |
| Chondroitin sulfate | 50 mg | More bleeding with warfarin; source may be cow, pig, shellfish or lab (NCCIH, Glucosamine and Chondroitin) |
| Turmeric root | 50 mg | Bleeding risk with blood thinners; liver injury linked to absorption-enhanced products (LiverTox, Turmeric) (MSK, Turmeric) |
| Quercetin | 8 mg | Kidney disease; can affect how some drugs are processed (VKM, Rutin and Quercetin supplements) |
| Methionine | 8 mg | Feeds the homocysteine pathway, which needs B12, B6 and folate (StatPearls, Hyperhomocysteinemia) |
| MSM | 8 mg | One trial recorded none, but used no sensitive safety tests (Debbi et al., MSM for knee osteoarthritis) |
| Bromelain | 8 mg | Stomach upset and diarrhea (NCCIH, Bromelain) |
Allergy02
Is Nervecept safe if you have a shellfish allergy?
Nervecept is not safe to assume for a shellfish allergy, because the label says CONTAINS: shellfish (crayfish). Most glucosamine is made from shellfish shells (NCCIH, Glucosamine and Chondroitin).
The label does not say how much shellfish protein each capsule holds. Ask an allergist before use. Read the allergen line on your bottle.
Hives, swelling of the lips or tongue, wheezing or trouble breathing after a capsule need emergency care. Call 911.
Medicines03
Is Nervecept safe with blood thinners and other medicines?
Nervecept is not safe to combine with blood thinners or diabetes medicine until a doctor or pharmacist has checked. Three ingredients carry bleeding cautions: glucosamine, chondroitin and turmeric (NCCIH, Glucosamine and Chondroitin) (NCCIH, Turmeric).
Keep taking prescribed medicine exactly as directed. A supplement is not a substitute for a prescription.
Blood thinners and aspirin
Warfarin, daily aspirin and NSAIDs: more bleeding has been linked to glucosamine and chondroitin, and turmeric may add to it.
Diabetes medicine
Glucosamine may raise blood sugar in some people, so ask whether you need closer checks (AFP, Glucosamine questions (Pirotta)).
Drugs the liver processes
Quercetin can affect how some drugs are absorbed and processed, and turmeric has liver cautions (VKM, Rutin and Quercetin supplements) (LiverTox, Turmeric).
Special groups04
Who should not take Nervecept without asking first?
Pregnant or nursing mothers, children under 18 and anyone with a known medical condition should not take Nervecept without asking a physician. The label says so directly.
Little is known about several of the ingredients in pregnancy (NIH ODS, Pregnancy and supplements). Tell your surgeon about the bottle before any operation. Glucosamine, chondroitin and turmeric carry bleeding cautions.
Do not exceed the recommended dose of one capsule a day. Keep the bottle out of reach of children, and do not use it if the safety seal is damaged or missing.
Our who it is for page has a five-question check, and supplements and medicines covers interactions in more depth.
Warning signs05
Which symptoms mean you should see a doctor?
Numbness or tingling that is new, spreading or getting worse means you should see a doctor, whatever supplement you take. Many causes can be treated. Early treatment matters.
The Cochrane reviews we cite found little or no clear benefit from nerve supplements as a group. A supplement should never delay that visit (Cochrane, Vitamin B for neuropathy) (Cochrane, Alpha-lipoic acid for diabetic neuropathy).
- Spreading or constantNumbness or tingling that keeps getting wider, or never goes away
- WeaknessDropping things, tripping, or a foot that slaps or drags
- Balance and fallsUnsteady walking, especially in the dark, or new falls
- Sores you do not feelCuts, blisters or color changes on the feet, most important with diabetes
- Burning pain at nightPain that wakes you, or a sock or sheet that hurts to touch
See a doctorAny of these, or tingling that is getting worse, is a reason to see a doctor. Many causes, such as diabetes or low B12, can be treated, and early treatment protects nerves. A supplement should not delay it.
Go nowNumbness with weakness, trouble speaking, confusion, vision change, loss of bladder or bowel control, or after a head, neck or back injury needs emergency care. Call 911 or go to an emergency room.
Warning signs from NINDS and MedlinePlus (NINDS, Peripheral Neuropathy) (MedlinePlus, Numbness and tingling).
If something goes wrong06
How do you report a Nervecept side effect?
If you have a reaction to Nervecept, stop taking it, get medical care if needed, then report it. You can report a problem with a supplement to the FDA through its safety reporting portal (FDA, How to Report a Problem with Dietary Supplements) (FDA, MedWatch).
For an order, a refund or a damaged seal, call the order desk at +1 (302) 200-3480 or email [email protected] with your order ID. The website inbox cannot see orders.
Stop and note
Write down the date, the symptom and the lot or bottle details you can see.
Get care
Call a doctor or pharmacist, or 911 for breathing trouble or swelling.
Report
File an FDA report, and tell the order desk if you want a refund under the seller's stated guarantee.
FAQ07
Nervecept questions people ask
What are the most common Nervecept side effects?
None has been measured, but stomach upset and diarrhea are the most commonly reported effects of two ingredients, boswellia and bromelain. Skin allergy is also reported with boswellia, and shellfish allergy is the main risk from glucosamine (Tavakoli et al., Boswellia adverse events) (NCCIH, Bromelain).
Does Nervecept cause stomach upset?
It might. Boswellia and bromelain can cause stomach upset or diarrhea in some people. If it happens, stop and ask a pharmacist before restarting, since the label gives no guidance on adjusting the dose (Tavakoli et al., Boswellia adverse events) (NCCIH, Bromelain).
Does Nervecept raise blood sugar?
It may. Glucosamine may raise blood sugar in some people, and Nervecept holds 500 mg per capsule. If you have diabetes or take diabetes medicine, ask your doctor before starting (AFP, Glucosamine questions (Pirotta)).
Can Nervecept interact with warfarin?
Possibly. Glucosamine and chondroitin have been tied to more bleeding in people on warfarin, and turmeric may raise bleeding risk. Ask the doctor who manages your warfarin before the first capsule. Never change your dose on your own (NCCIH, Glucosamine and Chondroitin) (NCCIH, Turmeric).
Can turmeric in Nervecept harm the liver?
Liver injury has been linked to absorption-enhanced turmeric products. Nervecept lists 50 mg of turmeric root, not a curcumin extract, so that exact risk is unclear. Report yellow skin, dark urine or upper belly pain to a doctor (LiverTox, Turmeric).
Is Nervecept safe for long-term use?
Unknown. No trial followed anyone taking Nervecept, and the label sets no length of use. The ingredient evidence covers weeks to months at most. Review long-term use with your doctor, along with your medicine list (NCCIH, Using Dietary Supplements Wisely).
Is Nervecept safe for older adults?
The label has no upper age limit, but older adults often take several medicines that glucosamine, chondroitin, turmeric or quercetin can interact with. A pharmacist can check the bottle against your list in a few minutes.
Who wrote this08
Written and reviewed by
Pages built from the label, the official site, the sales page and linked NIH, FDA, FTC and peer-reviewed sources.
Last updated . Read about our editorial standards and how we check reviews. This website is run by a U.S. order-link partner, not by the maker or distributor of Nervecept. We are paid when you buy through our order links.
Keep reading
More about Nervecept
Nervecept U.S. order-link partner
Ready to try Nervecept?
The order button opens the brand's sales page, where the order is placed and the final price and shipping are shown. Read the label, check for shellfish and check your medicines first.
- The order button opens the brand's sales page
- 60-day money-back guarantee, as the seller states it
- Free U.S. shipping on 3 and 6 bottles
