Expert Pharmacy Insights

Sildenafil vs Tadalafil vs Vardenafil: How the Three ED Tablets Really Differ

A side-by-side comparison of sildenafil (Viagra), tadalafil (Cialis) and vardenafil (Levitra) from their US labels, direct comparison trials and two 2026 analyses: timing, food effects, side effects above placebo, vision, the vardenafil QT warning, interactions, switching and US pharmacy cost.