1.痛经:两项双盲试验研究涉及106名原发性痛经的妇女,第一组有83名患者随机给予5天炎痛喜康治疗(第1、2日单剂量40mg,第3、4、5日改为20mg),或给予萘普生(500mg每日二次,服五天)。第二组有23名,当痛经症状出现时随机分成炎痛喜康或安慰剂组。两组患者在第二次月经周期时彼此交换治疗。 1. Dysmenorrhea: Two double-blind trials involving 106 women with primary dysmenorrhea and 83 patients in the first group were randomized to receive 5 days of piroxicam (Day 1 and Day 2 single doses of 40 mg, , On the 5th to 20mg), or given naproxen (500mg twice daily for five days). Twenty-three in the second group were randomized into YKK or placebo groups when dysmenorrhea symptoms appeared. The two groups of patients exchanged treatment with each other during the second menstrual cycle.