Silagra (Sildenafil) has been studied extensively in clinical trials, with over 3,700 people having been evaluated. Based on these studies, common Silagra (Sildenafil) side effects (occurring in more than 2 percent of people) included:

• Headache –17 percent of people
• Facial flushing — 9 percent of people
• Indigestion, known as dyspepsia — 6 percent of people
• Nasal congestion — 5 percent of people
• Diarrhea – 3.6 percent of people
• Urinary tract Infections (UTI) – 2.7 percent of people
• Vision problems, including trouble telling the difference between blue and green, increased sensitivity to light, or blurred vision — 3 percent of people
• Dizziness — 3 percent of people
• Unexplained rash — 1 percent of people.