Safety
Nerve Supplement Side Effects: Stomach Upset, Medicine Clashes and When to Call
Nerve supplement side effects reported in our sources are mostly stomach upset such as nausea and diarrhea, plus clashes with medicines. Each of the six Flow Nerves names has its own list. Flow Nerves prints no amounts, so we cannot match any study dose to a capsule. Stop and call a doctor if something feels wrong.
Written by the Flow Nerves label deskUpdated · 4 min read
The usual ones
What are the common nerve supplement side effects?
The common nerve supplement side effects in our sources are nausea, stomach cramps and diarrhea. They tend to show up with larger amounts.
NIH says high doses of magnesium from supplements often cause diarrhea, and its upper limit for supplemental magnesium is 350 mg a day for adults (NIH ODS, Magnesium). About 3 g a day of carnitine can cause nausea, vomiting, cramps, diarrhea and a fishy body odor (NIH ODS, Carnitine).
Those are limit and study figures, not amounts in Flow Nerves.
Name by name
Which Flow Nerves ingredients have reported side effects?
Each of the six names has at least one reported effect or caution. The table sets them side by side from the sources we read.
| Name | Reported in sources |
|---|---|
| Magnesium glycinate | Diarrhea at high supplement doses (NIH) |
| Alpha lipoic acid | Nausea, vomiting, indigestion; low blood sugar with diabetes medicine (MSK) (MSK, Alpha-lipoic acid) |
| Butcher's broom | Diarrhea and nausea; serious allergy is possible (WebMD) |
| L-carnitine | Nausea, heartburn, diarrhea, headache, body odor (MSK) |
| Turmeric extract | Highly absorbable curcumin may harm the liver (NCCIH) (NCCIH, Turmeric) |
| Coenzyme Q10 | Upper stomach pain, appetite loss, nausea, diarrhea (Mayo Clinic) |
Dose context
How do study doses compare with what Flow Nerves prints?
Study doses cannot be set beside Flow Nerves, because the label prints no amount for any name. The bars show the reference amounts that sources give, next to a dashed bar for the missing figure.
Medicines
Can nerve supplements cause medicine side effects?
Yes, some can clash with medicines. Magnesium can weaken some antibiotics, and alpha lipoic acid may add to diabetes medicine, so low blood sugar is the concern (MSK, Magnesium) (MSK, Alpha-lipoic acid).
Coenzyme Q10 might make warfarin work less well (Mayo Clinic, Coenzyme Q10). Low blood sugar can feel shaky, hungry, dizzy or confused, and very low levels need prompt care (NIDDK, Low blood glucose).
Ask a doctor or pharmacist first with diabetes medicine, blood thinners, blood pressure, thyroid or seizure medicine, or kidney or liver disease.
When to call
When should you stop a nerve supplement and call a doctor?
Stop the supplement and call a doctor if you feel unwell after taking it, or if stomach upset does not pass. Call 911 for swelling of the face or throat, trouble breathing, chest pain or fainting.
You can also send a report to FDA's MedWatch program (FDA, MedWatch). For placed orders, the Flow Nerves desk is +1 (302) 200-3480.
FAQ
Flow Nerves questions people ask
Do nerve supplements cause diarrhea?
Some can. NIH says high supplement doses of magnesium often cause diarrhea (NIH ODS, Magnesium). Other names in this category, such as carnitine and butcher's broom, can too.
Can a nerve supplement cause liver problems?
NCCIH says highly bioavailable curcumin formulations may harm your liver (NCCIH, Turmeric). Flow Nerves names turmeric extract and prints no amount. Ask a doctor if you have liver disease.
What are the side effects of Flow Nerves?
No study of Flow Nerves exists in our sources, so we list only reports on its six names. Stomach upset is the most common.
How do I report a supplement problem?
You can report to FDA through MedWatch (FDA, MedWatch). Tell your doctor too.
Who wrote this
Written and reviewed by
Pages built from the label, the brand panels and linked NIH, FDA, CDC, FTC and peer-reviewed sources.
Last updated . Read our editorial standards and how we check reviews. This website is the information site for a U.S. stocking partner for Flow Nerves. It is not the manufacturer or a distributor named on the label. We earn money when you buy through our order links.
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