1、Does sildenafil cause myocardial infarction or sudden cardiac death?
* 會引起心肌梗死或心源性猝死嗎？

2、He said sildenafil worked at least as well as melatonin, a jet-lag treatment.
他還認為昔多芬的作用至少和目前用于治療時差綜合癥的退黑激素的作用類似。

3、Objective To explore the effect of sildenafil on the hemodynamics in migrants at high altitude.
目的探討西地那非對高原移居青年血流動力學(xué)的影響。