Atropine or glycopyrrolate with neostigmine 5 mg: a comparative dose-response study

Area of Science:

• Anesthesiology
• Pharmacology

Background:

• Neostigmine is commonly used to reverse neuromuscular blockade.
• Atropine and glycopyrrolate are frequently administered with neostigmine to mitigate muscarinic side effects.

Purpose of the Study:

• To compare the efficacy and safety of different doses of atropine and glycopyrrolate when co-administered with neostigmine for neuromuscular blockade reversal.
• To determine the optimal dose of glycopyrrolate for minimizing cardiovascular changes during neostigmine-induced reversal.

Main Methods:

• A randomized study involving 115 patients divided into four groups.
• Patients received a fixed dose of neostigmine (5 mg) combined with varying doses of atropine (1.2 mg or 1.8 mg) or glycopyrrolate (0.6 mg or 0.9 mg).
• Heart rate changes were monitored in the immediate postreversal period.

Main Results:

• The group receiving 0.9 mg of glycopyrrolate with 5 mg of neostigmine exhibited insignificant changes in heart rate.
• Other treatment groups showed varying degrees of heart rate alteration.

Conclusions:

• The optimal dose of glycopyrrolate when used with 5 mg of neostigmine is 0.9 mg.
• This dosage regimen is recommended for achieving effective neuromuscular reversal with minimal impact on heart rate.