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

Neiraxin combines B‑vitamins and lidocaine to act on nutritional deficiency states and procedural pain control.

• Vitamin B1 deficiency (e.g., beriberi, Wernicke’s encephalopathy): restores thiamine levels and supports neurological function.
• Vitamin B12 deficiency (e.g., pernicious anemia, malabsorption): provides cyanocobalamin to correct hematologic and neurologic abnormalities.
• Procedural pain management: lidocaine component offers rapid local anesthesia for intramuscular injections or minor surgical procedures.

• Thiamine hydrochloride serves as a co‑factor for enzymes in carbohydrate metabolism, cyanocobalamin participates in DNA synthesis and red‑cell formation, pyridoxine hydrochloride supports amino‑acid transamination, and lidocaine hydrochloride blocks voltage‑gated sodium channels to inhibit nerve impulse propagation, together delivering nutritional repletion and localized analgesia after intramuscular administration.

Neiraxin may cause a range of adverse reactions depending on its vitamin and anesthetic components.

Common Side Effects

• Injection site pain or erythema
• Mild headache
• Nausea or vomiting
• Dizziness or light‑headedness
• Transient hypotension
• Tingling or numbness at the injection site

Serious or Rare Side Effects

• Anaphylactic or severe allergic reaction
• Stevens‑Johnson syndrome or toxic epidermal necrolysis
• Cardiac arrhythmias or severe bradycardia
• Seizures or central nervous system depression
• Severe hypotension or cardiovascular collapse
• Hemolytic anemia or severe hematologic disturbances

Neiraxin should be used with attention to patient‑specific factors and handling requirements.

• Assess vitamin deficiency status: confirm need for B‑vitamin supplementation before administration.
• Monitor for hypersensitivity: observe for signs of allergic reaction during and after injection.
• Use caution in cardiac conduction disorders: lidocaine may exacerbate bradyarrhythmias.
• Avoid in severe hepatic impairment: metabolism of lidocaine may be reduced.
• Adjust in renal failure: excretion of vitamin components may be altered.
• Store at 2-8°C: keep refrigerated, protect from light, do not freeze or shake.

Neiraxin can interact with several drug classes, requiring careful assessment.

Major Interactions (Avoid)

• Class I antiarrhythmic agents (e.g., quinidine, procainamide): may potentiate lidocaine’s cardiac effects.
• Strong CYP3A4 inhibitors (e.g., ketoconazole, erythromycin): can increase lidocaine plasma concentrations.
• High‑dose vitamin B supplements: may lead to excess vitamin levels and interfere with laboratory assessments.

Moderate Interactions (Monitor Closely)

• Beta‑blockers: may enhance lidocaine‑induced bradycardia.
• Diuretics: may affect electrolyte balance influencing lidocaine activity.
• Alcohol: can increase risk of central nervous system depression when combined with lidocaine.