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nausea, vomiting, stomach pain, weakness, and chest pain (angina). It can also 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 propionyl-L-carnitine during pregnancy and breast-feeding. Stay on the safe side and avoid use.
"Underactive thyroid" (hypothyroidism): There is a concern that propionyl-L-carnitine might make hypothyroidism worse or thyroid hormone treatment less effective. This is because a related chemical, L-carnitine, seems to interfere with thyroid hormone. If you have hypothyroidism, don't take propionyl-L-carnitine.
Seizures: Some people who have a history of seizures have reported an increase in the number and severity of seizures after taking L-carnitine by mouth or intravenously (by IV). There is a concern that this might also occur with propionyl-L-carnitine, because it is a similar chemical.
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.