Primary dysmenorrhoea can be readily relieved with nonsteroidal anti-inflam
matory drugs (NSAIDs). These drugs inhibit prostaglandin synthetase, reduci
ng the level of prostanoids in the uterus and the uterine contractions that
cause the painful cramps. Piroxicam-beta-cyclodextrin is rapidly absorbed
and quickly reaches peak blood concentrations. Four published clinical stud
ies have evaluated piroxicam-beta-cyclodextrin for relief of primary dysmen
orrhoea. Piroxicam-beta-cyclodextrin 20mg once daily was significantly more
effective than placebo in relief of dysmenorrhoea, was better than ketopro
fen in relieving the abdominal pain of dysmenorrhoea, and had a quicker ons
et and longer duration of relief than naproxen. Both investigators and pati
ents rated a greater preference for piroxicam-beta-cyclodextrin over the co
mparator medications. The tolerability of piroxicam-beta-cydodextrin in the
treatment of dysmenorrhoea was good, with a very low incidence of adverse
effects.