Bupivacaine Injection 0.25 %

Bupivacaine Injection 0.25%

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📘 Description of Bupivacaine Injection 0.25%

Bupivacaine Injection 0.25% is a sterile, non-pyrogenic, aqueous solution of bupivacaine hydrochloride, an amide-type local anesthetic, formulated for local or regional anesthesia. It is intended for injection only and must be administered by a qualified healthcare professional.

📝 Prescription Information

• Generic Name: Bupivacaine Hydrochloride
• Strength: 0.25% solution = 2.5 mg/mL
• Form: Clear, colorless sterile solution for injection
• Route: Infiltration, epidural, caudal, nerve block, or spinal (not IV)
• Packaging: Ampoules or vials (e.g., 10 mL, 20 mL)
• Prescription: Prescription-only medicine (POM)
• Drug Class: Amide-type local anesthetic

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💊 Uses

Bupivacaine 0.25% is used for local or regional anesthesia in a wide variety of procedures:

1. Infiltration anesthesia – for minor surgical or dental procedures
2. Peripheral nerve blocks – e.g., brachial plexus, sciatic nerve
3. Epidural anesthesia – for labor, cesarean section, or lower limb surgery
4. Caudal anesthesia – commonly in pediatric procedures
5. Postoperative pain control – continuous infusion or single-dose blocks
6. Field blocks – for procedures like hernia repair or wound suturing

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🌿 Nature of Bupivacaine

• Form: Clear, aqueous solution
• Type: Amide local anesthetic
• Onset: Slower (10–20 minutes) compared to lidocaine
• Duration: Long-acting — typically 3 to 8 hours
• Mechanism: Blocks sodium channels → prevents nerve impulse conduction
• pH: 4.0–6.5 (may contain preservatives unless for spinal use)

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✅ Advantages

1. Long Duration of Action
   • Ideal for extended surgical procedures or long-term pain relief.
2. Lower Concentration Use
   • 0.25% used for infiltration or minor nerve blocks to reduce motor block.
3. Versatile
   • Suitable for multiple types of regional blocks and infiltrations.
4. Reduced Motor Block (at 0.25%)
   • Preserves some motor function, making it preferred for labor analgesia.
5. Lower Toxicity Risk (vs. Higher Strengths)
   • 0.25% concentration reduces chances of systemic toxicity.

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⚠️ Precautions

• Cardiotoxicity
  • Risk of serious side effects like arrhythmias, cardiac arrest with accidental IV injection — use test dose first.
• CNS Effects
  • High doses or intravascular injection may cause seizures, drowsiness, tinnitus, numb tongue, or convulsions.
• Resuscitation Equipment Required
  • Must be readily available when administering regional blocks.
• Avoid Intravascular Injection
  • Always aspirate before injection; consider test dose with epinephrine.
• Use with Caution in Elderly, Liver Disease, or Heart Conditions
• Pregnancy
  • Safe for labor analgesia (especially 0.25% and lower), but dosage should be adjusted.
• Interactions
  • Use caution with other local anesthetics or CNS depressants.

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📦 Common Packaging

• Vials/Ampoules: 10 mL, 20 mL, 50 mL
• Concentrations: 0.25%, 0.5%, 0.75%
• Preservative-Free Forms: Required for intrathecal (spinal) use

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🧪 Storage

• Store below 25°C
• Protect from light
• Do not freeze