Effect of ultrahigh-dose methylcobalamin on compound muscle action potentials in amyotrophic lateral sclerosis: a double-blind controlled study

Summary This double-blind trial compared the effects of the methylcobalamin form of vitamin B12 on muscle function in amyotrophic lateral sclerosis (ALS) patients when given intramuscularly in ultrahigh-dose (25 mg/day) and low-dose (0.5 mg/day) for 14 days. The researchers found that ultrahigh-dose intramuscular injection of methylcobalamin may provide a clinically useful measure to improve or…