Instead, it acts by inhibiting the breakdown of cyclic guanosine monophosphate in the corpus cavernosum. In other words, Viagra is no aphrodisiac. For the drug to work, you have to be "in the mood" as well.
換句話說，威而鋼並不是催情劑，縱使使用藥物，還要配合「心理的威而鋼」，避免因缺乏自信、未「站」先怯，才能達到真正的「性」福境界。