What are the most common side effects of Sildenafil Citrate (generic Viagra®)?

The most common side effects include headache, flushing, indigestion, abnormal vision, nasal congestion, back pain, muscle pain, nausea, dizziness and rash. You can view detailed safety information for Sildenafil Citrate (generic Viagra®)* here. Reach out to your medical provider regarding any side effects that you experience.