Vitamin B-Complex Injection

Form: Injectable solution (intramuscular or intravenous)
Category: Nutritional supplement – B-vitamin complex

Indications

• Treatment and prevention of vitamin B-complex deficiencies

• Supportive therapy in neurological disorders, alcoholism, malabsorption syndromes, post-surgical recovery, and chronic fatigue

• Commonly used in cases of peripheral neuropathy, megaloblastic anemia, and general weakness

Key Components & Their Functions

• Vitamin B1 (Thiamine): Aids carbohydrate metabolism and nerve function

• Vitamin B2 (Riboflavin): Supports energy production and antioxidant protection

• Vitamin B3 (Niacinamide): Essential for DNA repair and energy conversion

• Vitamin B5 (Pantothenic Acid): Helps synthesize coenzyme A and supports adrenal function

• Vitamin B6 (Pyridoxine): Important for protein metabolism and nerve health

• Vitamin B12 (Cyanocobalamin or Hydroxocobalamin): Supports red blood cell formation and neurological function

Dosage & Administration

• Route: Intramuscular (IM) or intravenous (IV), depending on formulation and indication

• Typical Adult Dose: 1–2 mL IM daily or on alternate days for 5–10 days, then weekly or monthly as maintenance

• Dosage and frequency depend on the severity of deficiency and clinical condition

Mechanism of Action

• Supplies essential B vitamins necessary for energy metabolism, nerve conduction, red blood cell production, and DNA synthesis

• Rapidly corrects deficiencies, especially when oral absorption is impaired

Side Effects & Precautions

• Local reactions: Pain, redness, or swelling at injection site

• Systemic: Nausea, flushing, dizziness, or allergic reactions (rare)

• In large or repeated doses, Vitamin B6 may cause sensory neuropathy

• Use with caution in individuals with renal dysfunction or known hypersensitivity

Contraindications

• Known hypersensitivity to any B-vitamin component

• Severe liver dysfunction (for some formulations)

• Avoid repeated use unless under medical supervision

Storage

• Store below 25–30°C

• Protect from light; keep ampoules in the box until use

Advice to Patients

• Usually administered by a healthcare professional

• Inform your provider about any allergies or medications

• May cause mild urine discoloration (yellow) due to riboflavin – this is harmless

• Regular monitoring may be required in long-term therapy