비아그라에 대해 알려지지 않은 사실
VIAGRA can result in your blood pressure to drop all of a sudden to an unsafe level if it is taken with certain other medicines. Tend not to take VIAGRA if you're taking almost every other medicines known as “nitrates.The commonest Unintended effects of VIAGRA: headache; flushing; upset belly; abnormal vision, including changes in shade vision (s