Vitamin B1, B2 and B6: Brands, Price & Uses in Bangladesh

Established / Widely Accepted Uses

• Prevention and treatment of dietary deficiency of thiamine (Vitamin B1), riboflavin (Vitamin B2), and pyridoxine (Vitamin B6), such as in inadequate diet, malabsorption, chronic alcohol use, or increased metabolic demand.
• General nutritional supplementation to maintain normal energy (carbohydrate, fat, and protein) metabolism and nervous system function.

Guideline-Supported / Adjunct Uses

• Adjunctive supportive therapy in peripheral neuritis/neuropathy (e.g. diabetic neuropathy, alcohol-related neuropathy) alongside disease-specific treatment; Vitamin B1, B2 and B6 is not a substitute for treating the underlying cause.
• Supplementation during conditions of increased B-vitamin requirement, such as pregnancy, lactation, prolonged illness, or convalescence, under medical advice.

Uses Requiring Combination Therapy

• Isoniazid-associated peripheral neuropathy prevention: pyridoxine (a component of Vitamin B1, B2 and B6) is co-administered with isoniazid during tuberculosis treatment specifically to prevent isoniazid-induced B6 deficiency.

Vitamin B1, B2 and B6 is intended for mild-to-moderate deficiency states and general supplementation; severe, diagnosed single-vitamin deficiencies (e.g. beriberi, Wernicke's encephalopathy) usually require higher-dose, physician-directed, sometimes parenteral, therapy rather than this combination product.

Adult Dose

Pediatric Dose

Use in children should be guided by a pediatrician; age-appropriate, lower-strength formulations of Vitamin B1, B2 and B6 (if available) or weight-based dosing should be used. Safety and dosing of specific higher-strength Vitamin B1, B2 and B6 products have not been established in young children.

Renal/Hepatic Impairment

No specific dose adjustment is well established for standard supplemental doses of Vitamin B1, B2 and B6 in mild-to-moderate renal or hepatic impairment; however, patients with significant renal impairment (e.g. on dialysis) may have altered B-vitamin requirements and should use Vitamin B1, B2 and B6 under medical supervision (see Use in Special Populations).

Vitamin B1, B2 and B6 is generally well tolerated at standard supplemental doses. Reported side effects include:

• Mild gastrointestinal upset (nausea, stomach discomfort) — usually reduced by taking Vitamin B1, B2 and B6 with food.
• Harmless bright-yellow discoloration of urine due to the riboflavin component.
• Uncommon hypersensitivity reactions (skin rash, itching), particularly with the thiamine component in injectable forms; rare anaphylactoid reactions have been reported with parenteral thiamine.
• Peripheral sensory neuropathy (numbness, tingling, unsteady gait) with prolonged high-dose use of the pyridoxine component — see Precautions and Warnings and Overdose Effects.