Common side effects of sildenafil can include headache, flushing, nasal congestion, indigestion, and dizziness. Serious side effects are rare but can occur. Its important to be aware of potential interactions with other medications and conditions. Your healthcare provider can provide guidance on potential side effects and interactions.caverta 50 should not be taken in combination with nitrates (e.g., nitroglycerin) or certain other medications used to treat chest pain or heart conditions, as this can lead to a dangerous drop in blood pressure. Inform your healthcare provider of all your medications and health conditions. https://www.genericday.com/caverta-50-mg.html