Comparison of the frequency of muscle pain associated with suxamethonium in pre- and post-ovulatory women and in those taking a combined oral contraceptive pill.

The frequency of muscle pain following the use of suxamethonium was compared in pre- and post-ovulatory women and in those taking a combined oral contraceptive pill. There were no statistically significant differences between the groups. It is suggested that serum concentrations of progestogen were too low to produce the protection against suxamethonium pains reported in late pregnancy.