Nexubet-3 (Thiamine Hydrochloride, Cyanocobalamin, Pyridoxine Hydrochloride)

Nexubet-3 provides essential B‑vitamins that support metabolic pathways and is indicated for specific vitamin deficiency states.

• Thiamine (vitamin B1) deficiency: restores normal carbohydrate metabolism and prevents neurological complications.
• Pyridoxine (vitamin B6) deficiency: supports amino‑acid metabolism and reduces peripheral neuropathy.
• Cyanocobalamin (vitamin B12) deficiency: promotes red blood cell formation and neurological function.

• The three B‑vitamins act as co‑enzymes in key biochemical reactions. Thiamine pyrophosphate participates in decarboxylation of α‑keto acids, pyridoxal‑5‑phosphate facilitates transamination and decarboxylation of amino acids, and methylcobalamin (derived from cyanocobalamin) is essential for methionine synthase activity, enabling DNA synthesis and myelin formation.

Adverse reactions may occur following intramuscular administration of Nexubet-3.

Common Side Effects

• Injection site pain: mild to moderate discomfort at the injection site.
• Redness or swelling: localized erythema or edema.
• Headache: transient headache after dosing.
• Nausea: occasional mild nausea.
• Dizziness: brief episodes of light‑headedness.

Serious or Rare Side Effects

• Anaphylaxis: severe allergic reaction requiring immediate medical attention.
• Severe hypotension: sudden drop in blood pressure post‑injection.
• Stevens‑Johnson syndrome: rare mucocutaneous eruption.
• Hemolytic anemia: uncommon destruction of red blood cells.
• Thromboembolic events: very rare clot formation.

Before using Nexubet-3, consider the following safety measures.

• Assess deficiency: confirm laboratory evidence of B‑vitamin deficiency before administration.
• Allergy history: verify no known hypersensitivity to any component of the formulation.
• Pregnancy and lactation: use only if the potential benefit outweighs the risk; consult a healthcare professional.
• Renal or hepatic impairment: adjust monitoring as needed for patients with organ dysfunction.
• Concomitant therapy: review other vitamin or mineral supplements to avoid excess dosing.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Nexubet-3 may interact with other medicines; awareness of the interaction level helps guide clinical decisions.

Major Interactions (Avoid)

• Metformin: may mask B12 deficiency symptoms, leading to delayed diagnosis.
• Phenytoin: can accelerate vitamin B6 metabolism, reducing therapeutic effect.
• High‑dose folic acid: may mask hematologic signs of B12 deficiency.

Moderate Interactions (Monitor Closely)

• Proton pump inhibitors: may impair absorption of oral B‑vitamins, though less relevant for intramuscular route.
• Anticonvulsants (e.g., carbamazepine): may increase vitamin B6 turnover.
• Chemotherapeutic agents: monitor for additive neurotoxicity.