L CARNITINE Dermaqual 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 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 LCarnitine Injections Energy & Fat Metabolism Support TX How to Self Administer Subcutaneous & Intramuscular Injections Subcutanous injection self administration South Tees Hospitals NHS Foundation Trust