Vigora 50 mg is a safe and effective medication that has been approved by the FDA. However, it is important to discuss any potential risks or side effects with your doctor before taking this medication. Common side effects include headaches, flushing, and upset stomach. In rare cases, Vigora has been known to cause serious side effects such as vision loss, hearing loss, dizziness, and fainting. If any of these side effects occur, contact your doctor immediately.