Both Viagra (sildenafil) and Cialis (tadalafil) can cause side effects, but their frequency and severity vary. Headache is common to both, affecting approximately 10-15% of users. Facial flushing occurs more frequently with Viagra (around 10-15%) than with Cialis (around 2-10%). Nasal congestion is another shared side effect, slightly more prevalent with Viagra.
Gastrointestinal Effects
Upset stomach is a possibility with both medications, though less frequent than headache or flushing. Viagra may be associated with slightly higher instances of dyspepsia (indigestion) compared to Cialis. Remember, individual reactions differ significantly. Always consult your doctor about any concerns.
Visual Disturbances and Other Effects
Changes in vision, such as blurred vision or sensitivity to light, are reported more often with Viagra. Back pain and muscle aches are more common with Cialis. Rare but serious side effects exist with both; prolonged erection (priapism) requires immediate medical attention. Always inform your doctor of your medical history before starting either medication.
