Pyridoxine Hydrochloride (Vitamin B6)Third Party Manufacturing in India

Pyridoxine Hydrochloride is the synthetic form of vitamin B6 that serves as a prodrug for the physiologically active coenzyme forms, pyridoxal-5-phosphate and pyridoxamine-5-phosphate. Following parenteral administration, pyridoxine is converted by the zinc-dependent enzyme pyridoxal kinase to pyridoxine-5-phosphate, which is then oxidised by pyridoxine-5-phosphate oxidase to pyridoxal-5-phosphate, the principal active coenzyme. Pyridoxal-5-phosphate functions as an essential cofactor for over 140 enzymatic reactions primarily involving amino acid metabolism. It participates in transamination reactions for amino acid synthesis and degradation, decarboxylation of amino acids to form bioactive amines including serotonin (5-hydroxytryptamine) from tryptophan, histamine from histidine, and gamma-aminobutyric acid from glutamate. Pyridoxal-5-phosphate is also essential for the conversion of tryptophan to niacin, the transsulfuration pathway involving homocysteine metabolism, heme biosynthesis via delta-aminolevulinic acid synthase, and glycogen phosphorylase for glycogen breakdown to glucose-1-phosphate. By replenishing intracellular pyridoxal-5-phosphate levels, pyridoxine corrects B6 deficiency states, supports neurotransmitter synthesis, and ameliorates metabolic disturbances associated with vitamin B6 depletion.

Therapeutic Uses

Pyridoxine Hydrochloride Injection is indicated for the treatment and prevention of vitamin B6 deficiency:

• Nutritional Vitamin B6 Deficiency: Corrects deficiency resulting from inadequate dietary intake, malabsorption syndromes, alcoholism, and protein-energy malnutrition where oral supplementation is not feasible.
• Isoniazid-Induced Deficiency: Prevents and treats peripheral neuropathy caused by isoniazid therapy for tuberculosis. INH forms hydrazone complexes with pyridoxal-5-phosphate, functionally depleting vitamin B6 levels. Standard prophylaxis is 10-40mg daily, while acute INH poisoning requires gram-level doses.
• Vitamin B6-Dependent Seizures: Treats a rare autosomal recessive disorder caused by mutations in the ALDH7A1 gene, resulting in pyridoxine-responsive epilepsy in neonates and infants requiring lifelong high-dose pyridoxine therapy.
• Vitamin B6-Responsive Anaemia: Manages sideroblastic anaemia subtypes where pyridoxal-5-phosphate is required for delta-aminolevulinic acid synthase activity in heme biosynthesis.
• Nausea and Vomiting in Pregnancy: Used parenterally when oral antiemetics are ineffective and intravenous access is established, particularly in hyperemesis gravidarum.
• Preoperative and Postoperative Nutritional Support: Administered parenterally when oral intake is restricted following gastrointestinal surgery, providing essential B6 support for protein metabolism and wound healing.
• Oral Contraceptive-Induced B6 Depletion: Corrects functional vitamin B6 deficiency in women using oral contraceptives, which can alter tryptophan metabolism and contribute to mood disturbances.

Why Manufacturers Choose Pyridoxine Hydrochloride

Pyridoxine Hydrochloride Injection is a core hospital formulary item with consistent institutional demand across all healthcare settings. As a WHO Essential Medicine, it is included in standard treatment protocols for tuberculosis management and vitamin deficiency correction worldwide, creating reliable procurement volumes from government health programs, hospital pharmacies, and institutional buyers. The injection is a straightforward sterile liquid formulation — 100mg/ml in 1ml and 2ml ampoules — with well-established manufacturing processes, readily available API at competitive prices from established Indian manufacturers, and a clear IP monograph that simplifies regulatory filings. For Indian WHO-GMP certified sterile injectable manufacturers, pyridoxine HCl injection represents a foundational product that complements broader B-complex and multivitamin injectable portfolios, enabling efficient line utilisation and bundled supply contracts with institutional customers.