L Carnitine injection is recommended at 1 ampule every 2 3 days for best results. The L Carnitine is taken intravenously either by normal injection or using a butterfly needle. After taking this L Carnitine, you Science review: Carnitine in the treatment of valproic acid induced toxicity what is the evidence? Critical Care Springer Nature Link L Carnitine (Mixed Fruit) Outlastlabz PVL L Carnitine 750 90 Capsules Supplement King L Carnitine 5000 SMA CARNI VAL Trial Part I: Double Blind, Randomized, Placebo Controlled Trial of L Carnitine and Valproic Acid in Spinal Muscular Atrophy PLOS One