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nausea, vomiting, and restlessness. It can cause a "fishy" odor of the urine, breath, and sweat.
Special Precautions & Warnings:Pregnancy and breast-feeding: Not enough is known about the use of acetyl-L-carnitine during pregnancy and breast-feeding. Stay on the safe side and avoid use.
Under-active thyroid (hypothyroidism): There is some concern that acetyl-L-carnitine might interfere with thyroid hormone. Don't use acetyl-L-carnitine if you have an under-active thyroid.
Seizures: An increase in the number or seriousness of seizures has been reported in people with a history of seizures who have used L-carnitine by mouth or by IV (intravenously). Since L-carnitine is related to acetyl-L-carnitine, there is a concern that this might also occur with acetyl-L-carnitine. If you have ever had a seizure, don't take acetyl-L-carnitine.
Report Problems to the Food and Drug Administration
You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.