L-Arginine Therapy for MELAS Syndrome Management

Dosing Regimen

For patients with MELAS syndrome, the recommended dose of L-arginine is 600 mg/kg/day for patients weighing less than 20 kg and 12 g/m² for patients weighing more than 20 kg, administered as both acute treatment for stroke-like episodes and maintenance therapy, as recommended by the medical community 1, 2, 3
For stroke-like episodes, L-arginine hydrochloride should be administered intravenously, with a weight-based dosing regimen: weight <20 kg, 600 mg/kg; weight >20 kg, 12 g/m², given over 90 minutes as bolus, then as maintenance over 24 hours 1, 2, 3

For prevention of stroke-like episodes, oral L-arginine should be administered to maintain plasma arginine concentration, with the same dosing as acute treatment but administered orally for long-term maintenance, as suggested by medical guidelines 4

Monitor for potential hypotension, especially when administering intravenous formulations, and consider potential drug interactions with medications that affect vascular tone or blood pressure, as advised by medical experts 1, 2, 4
Dosage may need adjustment in patients with renal impairment, to ensure safe and effective treatment 3