Single dose suxamethonium and muscle pain in pregnancy.

The frequency of muscle pain was studied in two groups of patients. One group consisted of 106 women undergoing Caesarean section; the other comprised 20 pre-menopausal women undergoing hysterectomy. Both groups received a single bolus injection of suxamethonium 100 mg to facilitate tracheal intubation. There was a statistically significant decrease in the frequency of muscle pain in the pregnant group (7.5%) compared with the non-pregnant group (30%).