Medications for Spinal Anesthesia

Drugs for Cesarean Delivery & Duration of Surgical Anesthesia:

• 0.5% tetracaine in 5% dextrose: 90–120 min

• 5% lidocaine in 7.5% dextrose in water: 45–60 min

• 0.75% bupivacaine in 8.5% dextrose in water 90–120 min

• 0.5% bupivacaine in 8.0% dextrose in water 90–120 min but not yet approved by FDA

• 5% meperidine in 10% dextrose, same volume to make it hyperbaric 45–50 min

    A combination of local anesthetic and narcotic has been shown to intensify the sensory anesthesia; visceral nociceptive afferents have also been found to be blunted. Fentanyl (6.25–12.5 μg) mixed with 0.75% bupivacaine is associated with excellent intraoperative analgesia as well as a few hours of postoperative pain relief.

    Addition of small doses of clonidine (30–60 μg) mixed with fentanyl and morphine will improve postoperative pain relief.

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