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heartburn, diarrhea, and seizures. It can also cause a "fishy" odor of the urine, breath, and sweat.
L-carnitine seems to be safe when used appropriately, short-term in children.
L-carnitine seems safe for most breast-feeding women when taken in the amounts recommended. The effects of large doses taken by a breast-feeding mother are unknown.
Do not take L-carnitine if:
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.