Neiraxin (Thiamine Hydrochloride, Cyanocobalamin, Pyridoxine Hydrochloride, Lidocaine Hydrochloride)

Neiraxin is employed to address vitamin deficiencies and provide local anesthesia for minor procedures.

• Beriberi (thiamine deficiency): restores thiamine levels and supports carbohydrate metabolism.
• Pernicious anemia (cobalamin deficiency): supplies vitamin B12 for normal red blood cell formation.
• Pyridoxine deficiency neuropathy: alleviates neurological symptoms by replenishing vitamin B6.
• Procedural analgesia: provides rapid local anesthesia during intramuscular injections.

• Thiamine acts as a co‑factor for enzymes in carbohydrate metabolism, cyanocobalamin participates in DNA synthesis and neurologic function, and pyridoxine is essential for amino‑acid metabolism and neurotransmitter synthesis. Lidocaine blocks voltage‑gated sodium channels in neuronal membranes, preventing depolarisation and producing local anaesthesia. Together, the vitamins correct specific nutrient deficits while lidocaine offers immediate analgesic effect at the injection site.

Neiraxin may cause a range of adverse reactions following intramuscular administration.

Common Side Effects

• Injection site pain or mild erythema.
• Transient nausea or vomiting.
• Headache or dizziness.
• Light‑headedness or mild hypotension.
• Temporary tingling or numbness near the injection site.

Serious or Rare Side Effects

• Allergic reactions including rash, urticaria, or anaphylaxis.
• Severe hypotension or cardiovascular collapse.
• Cardiac arrhythmias linked to lidocaine toxicity.
• Stevens‑Johnson syndrome or toxic epidermal necrolysis.
• Neurotoxicity presenting as seizures or altered mental status.

Before administering Neiraxin, consider the following safety measures.

• Assess vitamin status: confirm deficiency before supplementation.
• Monitor for hypersensitivity: observe patients for signs of allergic reaction.
• Cardiac caution: use with care in patients with conduction disorders or heart disease.
• Hepatic/renal impairment: adjust use in severe liver or kidney dysfunction.
• Pregnancy and lactation: evaluate risk‑benefit ratio; use only if clearly needed.
• Store at ambient temperature: keep in original container, protect from moisture and direct sunlight.

Neiraxin may interact with other medications; awareness of the following is important.

Major Interactions (Avoid)

• Concurrent use of other local anesthetics: risk of cumulative lidocaine toxicity.
• CYP3A4 inhibitors (e.g., ketoconazole, erythromycin): may increase lidocaine plasma levels.

Moderate Interactions (Monitor Closely)

• High‑dose vitamin B supplements: potential for excess vitamin levels.
• Anticoagulants: intramuscular injection may increase bleeding risk.
• MAO inhibitors: monitor for hypertensive episodes when combined with lidocaine.
• Diuretics: may alter electrolyte balance affecting lidocaine activity.