🐍💉 Snake Venom Antiserum – Polyvalent (Soluble/Liquid)
📌 Description:
Snake venom antiserum (polyvalent) is a biological product derived from the plasma of horses immunized with the venoms of multiple venomous snake species (commonly in India: cobra, krait, Russell’s viper, saw-scaled viper). It contains specific antibodies that neutralize the toxic effects of snake venom.
- Type: Equine-derived immunoglobulin.
- Form: Sterile, clear to pale yellow liquid/soluble injectable solution.
- Used in: Cases of systemic or severe snake envenomation.
📜 Prescription:
- Prescription-only drug.
- Administered intravenously (IV) under medical supervision.
- Dose depends on:
- Type of snake.
- Severity of symptoms.
- Weight and age of patient.
🌿 Nature:
- Biological antivenom.
- Polyvalent: Acts against venom of multiple snake species.
- Soluble (liquid) form allows faster administration (compared to lyophilized powder requiring reconstitution).
✅ Advantages:
- Life-saving in systemic envenomation cases.
- Neutralizes venom and reverses paralysis, coagulopathy, and tissue damage.
- Ready-to-use in emergencies (no reconstitution needed).
- Effective across regions where multiple venomous snake species are prevalent.
⚠️ Precautions:
- Always perform a test dose (risk of allergic/anaphylactic reaction due to horse serum proteins).
- Must be used in hospital setting with emergency resuscitation equipment available.
- Monitor for:
- Fever, rash, urticaria (serum sickness).
- Bronchospasm, hypotension (anaphylaxis).
- Delayed hypersensitivity reactions (can occur days later).
- Use with caution in:
- Pregnancy – if benefits outweigh risks.
- Asthma/allergy-prone patients.
🧊 Storage:
- Store at 2–8°C (refrigerator).
- Do not freeze.
- Protect from light and heat.
- Use before expiry date and do not use if solution is cloudy or contains particles.
📦 Common Packaging:
- Glass vials or ampoules, each containing 10 mL or 20 mL of liquid.
- May be supplied as part of snakebite treatment kits.
- Each vial is labeled with snake species covered and batch number.
👨⚕️ Patient Advice
- This medicine is used to neutralize snake venom in the body.
- You will receive it as an IV injection in a hospital.
- Allergy testing may be done before administration.
- Let your doctor know if you have any history of allergies or asthma.
- After receiving antivenom, observe for delayed symptoms (fever, rash).
- Stay under observation for a few hours post-injection.
- Inform the doctor of any unusual symptoms like swelling, itching, or difficulty breathing.
- You may also receive fluids, pain relief, or antibiotics along with the antiserum.