does l carnitine work orally L-Carnitine: Benefits, side effects, and dosage Acetyl L-Carnitine vs L-Carnitine: 4
Description
Six Phase I/II clinical trials enrolling approximately 900 participants confirmed an excellent safety profile with no serious adverse events attributed to the compound

Huangfu L, Zha B, Li P, Wang L, Liu X, Cui H, et al

One small open-label study that provided 2530 g/kg/day (1500 g/day maximum) of methylcobalamin to 13 patients found no adverse effects ( N -acetyl-l-cysteine, one as a primary treatment and another as an add-on to risperidone

F.GarciaP

doi: 10.1136/thx.2003.006049 191
