When to take L carnitine: Dosage, forms, and side effects Dr Acetyl l carnitine has been compared to placebo treatments. It's also been compared to standard antidepressants. Most of those studies lead to the conclusion that acetyl l carnitine works like Cialis L Arginine L Carnitine Erectile Dysfunction: Exploring the Combination Liquid L Citrulline L Arginine Taurine Supplement for Energy Ripped Up Nutrition Effectiveness of L carnitine Supplementation to Sertraline for Treatment of Major Depressive Disorder: A Double blind Randomized Placebo controlled Trial Global Journal of Medical Pharmaceutical and Biomedical Update