twenty-five patients suffering from primary dysmenorrhoea took part in a double-blind crossover study which demonstrated flurbiprofen ( 100 mg three times a day ) to be significantly more effective than paracetamol ( 1 g three times a day ) in providing pain relief on days 1 and 2 , and on the worst day of pain .
C0000970
paracetamol
C0030193
pain