1answer Answer Feb 19, 2020 - 02:00 AM Pure L-carnitine is generally safe and do not have side effects
For these individuals, L-carnitine is considered an essential nutrient
[Ref] Other Very common (10% or more): Pain (35%), flu syndrome (29%), chest pain (15%), accidental injury (12%), asthenia (12%), fever (12%) Common (1% to 10%): Peripheral edema, weight decrease, weight increase Very rare (less than 0.01%): Body odor, International Normalized Ratio (INR) increased [Ref] Local Very common (10% or more): Injection site reaction (38%) [Ref] Musculoskeletal Musculoskeletal side effects, in chronic hemodialysis patients, for levocarnitine (the active ingredient contained in L-Carnitine) in relation to placebo therapy have included asthenia (8% to 12% vs 8%) and leg cramps (4% to 8% vs 13%)
Seizure 2016 , 36 , 3639 [14] Koeth, R.A