Neurobion Tablets

Composition

Each standard Neurobion tablet contains three neurotropic (nerve-supporting) B vitamins:

Vitamin	Active Ingredient	Amount per Tablet
Vitamin B1	Thiamine HCl	100 mg
Vitamin B6	Pyridoxine HCl	100-200 mg
Vitamin B12	Cyanocobalamin	200 mcg

Neurobion Forte is a higher-strength version. Injectable and liquid formulations also exist (the injectable form contains 1000 mcg of B12).

How Each Vitamin Works

Vitamin B1 (Thiamine)

Thiamine acts as a coenzyme (thiamine pyrophosphate) in carbohydrate and energy metabolism - it is indispensable for the metabolism of glucose in nerve cells. Deficiency causes beriberi (peripheral neuropathy with sensory and motor loss) and Wernicke encephalopathy (confusion, ophthalmoplegia, ataxia). Thiamine deficiency neuropathy is a painful, distal symmetrical axonal neuropathy. - Bradley and Daroff's Neurology in Clinical Practice

Vitamin B6 (Pyridoxine)

Pyridoxine acts as a coenzyme in amino acid metabolism and neurotransmitter synthesis. Deficiency causes a painful peripheral axonal neuropathy leading to weakness and sensory ataxia. It is commonly depleted by drugs such as isoniazid (used in tuberculosis treatment) - pyridoxine 100 mg/day is given prophylactically to prevent INH-induced neuropathy. - Goldman-Cecil Medicine; Harrison's Principles

Vitamin B12 (Cyanocobalamin)

B12 is required for myelin synthesis and DNA synthesis. Deficiency causes:

Megaloblastic (macrocytic) anemia
Subacute combined degeneration of the spinal cord - demyelination of the dorsal and lateral columns
Peripheral neuropathy - numbness, tingling, balance problems
Neuropsychiatric symptoms - cognitive impairment, dementia

Importantly, neurological complications of B12 deficiency can occur without anemia, and folic acid supplementation can mask the anemia while the neurological damage progresses unchecked. - Bradley and Daroff's Neurology; Yamada's Gastroenterology

Indications (Uses)

B-vitamin deficiency - prevention and treatment of B1, B6, and B12 deficiency states
Peripheral neuropathy - including diabetic neuropathy, alcoholic neuropathy, nutritional neuropathy
Drug-induced neuropathy - especially from isoniazid (TB treatment), metformin (depletes B12)
Nerve pain (neuralgia) - the combination of B vitamins has analgesic effects in nerve-related pain
Nutritional support - in malnutrition, malabsorption (post-bariatric surgery, celiac disease), elderly patients
Alcoholism - chronic alcohol use impairs absorption of all three vitamins
Pregnancy supplementation - gestational thiamine deficiency can cause symmetrical neuropathy

Dosage

Standard adult dose: 1 tablet three times daily (or as directed by physician)
Maintenance/prophylaxis: 1 tablet once daily
Can be taken with or without food

Side Effects

Generally well-tolerated at standard doses. Possible effects include:

Pyridoxine toxicity (with prolonged high-dose B6 > 200 mg/day): paradoxically causes sensory neuropathy - this is dose-dependent and reversible on stopping
Mild GI upset (nausea, stomach discomfort)
Allergic reactions (rare) - skin rash, itching
Urine may turn bright yellow (harmless - due to riboflavin metabolites in multi-B formulations)
Parenteral B12 rarely causes allergic reactions

Key Drug Interactions

Drug	Interaction
Isoniazid (INH)	INH depletes B6; Neurobion replenishes it
Metformin	Metformin reduces B12 absorption; supplementation may be needed
Levodopa	High-dose B6 can reduce levodopa efficacy (less relevant with carbidopa/levodopa combinations)
Chloramphenicol	Interferes with B12 response

Special Populations

Pregnancy: Safe and often recommended; B6 also helps with nausea of pregnancy
Bariatric surgery patients: At high risk of B12 deficiency - supplementation essential
Vegans/vegetarians: At risk of B12 deficiency (B12 found only in animal products)
Elderly: Reduced gastric acid impairs B12 absorption from food; supplementation common

Available Forms

Neurobion tablets - standard oral form
Neurobion Forte - higher strength
Neurobion injectable - IM injection for severe deficiency or malabsorption
Dolo-Neurobion - combination with paracetamol (for nerve pain with inflammation)
Neurobion B12 Extra Forte - contains only high-dose B12

Summary

Neurobion is a targeted neurotropic B-vitamin supplement. The combination of B1, B6, and B12 works synergistically - animal studies show the combination relieves nerve pain more effectively than any single vitamin alone. It is especially useful in conditions where the peripheral nervous system is at risk, such as diabetes, alcoholism, drug-induced neuropathy, and nutritional deficiency states.

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