💉 Neostigmine Injection 0.5 mg/mL
📘 Description:
Neostigmine Injection 0.5 mg/mL is a parenteral anticholinesterase medication used to reverse the effects of non-depolarizing muscle relaxants after surgery and to treat myasthenia gravis, urinary retention, and paralytic ileus. It enhances neuromuscular transmission by preventing the breakdown of acetylcholine.
🔬 Formulation:
- Active Ingredient: Neostigmine methylsulfate
- Strength: 0.5 mg per mL
- Dosage Form: Injectable solution
- Route: Intravenous (IV), Intramuscular (IM), or Subcutaneous (SC)
- Common Brands: Neostigmin®, Prostigmin®
🧪 Nature / Mechanism of Action:
- Drug Class: Reversible acetylcholinesterase inhibitor
- Mechanism: Inhibits the enzyme acetylcholinesterase, resulting in increased acetylcholine levels at the neuromuscular junction, thereby improving skeletal muscle tone and contraction.
🩺 Indications / Uses:
- ✅ Reversal of non-depolarizing neuromuscular blockade (e.g., rocuronium, vecuronium, atracurium) during anesthesia recovery
- ✅ Treatment of myasthenia gravis (adjunctive use)
- ✅ Postoperative urinary retention
- ✅ Postoperative paralytic ileus
✅ Advantages:
- Rapid onset of action (within 5–15 minutes)
- Widely used in anesthesia recovery rooms to safely restore breathing and motor function
- Effective for short-term management of myasthenia gravis exacerbations
- Can be co-administered with atropine or glycopyrrolate to counter muscarinic side effects
⚠️ Precautions:
- Use cautiously in patients with:
- Asthma or COPD (can increase secretions and bronchoconstriction)
- Bradycardia or heart block
- Seizure disorders
- Renal impairment (dose adjustment needed)
Combine with anticholinergics (e.g., atropine, glycopyrrolate) to reduce risks like bradycardia, salivation, and GI cramps.
📦 Storage:
- Store at 2°C to 8°C (refrigerated)
- Protect from light
- Do not freeze
- Use immediately after opening