Krisneuron Fast Injection is a parenteral formulation containing Methylcobalamin (1500 mcg), Vitamin B6 (Pyridoxine, 100 mg), and Niacinamide (100 mg), designed for rapid correction of vitamin deficiencies and neurological disorders. Methylcobalamin, an active form of Vitamin B12, plays a crucial role in nerve regeneration, hematopoiesis, and DNA synthesis. Vitamin B6, as Pyridoxine, is essential for amino acid metabolism, neurotransmitter synthesis, and maintaining normal nerve function. Niacinamide, a form of Vitamin B3, contributes to cellular energy production and supports nervous system health. Krisneuron Fast Injection is indicated for the treatment of peripheral neuropathy, vitamin B12 deficiency, and conditions associated with malabsorption or increased metabolic demands. It is also beneficial in managing neurological symptoms such as paresthesia, neuritis, and neuropathic pain. Administered intramuscularly or intravenously, this combination provides prompt bioavailability, ensuring rapid therapeutic effects. The formulation is particularly useful in patients with chronic alcoholism, diabetes mellitus, or those undergoing chemotherapy, where vitamin deficiencies are prevalent. Careful monitoring is advised to avoid potential adverse effects such as hypersensitivity reactions or vitamin B6 toxicity with prolonged use. Krisneuron Fast Injection should be used under medical supervision, with dosage and duration tailored according to clinical response and patient condition.