Numethyl Injection is a parenteral formulation combining Methylcobalamin (1500 mcg), Vitamin B6 (Pyridoxine, 100 mg), and Niacinamide (100 mg), designed to address deficiencies and support neurological and metabolic functions. Methylcobalamin, an active form of Vitamin B12, plays a critical role in DNA synthesis, nerve regeneration, and hematopoiesis. Vitamin B6 is essential for amino acid metabolism, neurotransmitter synthesis, and immune function, while Niacinamide, a form of Vitamin B3, contributes to cellular energy production and exhibits neuroprotective properties. This combination is indicated for the treatment of peripheral neuropathies, vitamin B deficiencies, and certain metabolic disorders where enhanced nerve repair and improved metabolic activity are desired. Numethyl Injection is particularly beneficial in conditions such as diabetic neuropathy, alcoholic neuropathy, and vitamin B complex deficiencies. The intramuscular or intravenous administration ensures rapid bioavailability and effective therapeutic levels. Careful monitoring is advised in patients with renal impairment or hypersensitivity to any component. Adverse effects are generally mild but may include injection site reactions, gastrointestinal disturbances, or allergic responses. Numethyl Injection should be used under medical supervision, with dosage adjustments based on clinical response and patient tolerance to optimize therapeutic outcomes.