Vilitra contains Vardenafil, which differentiates it from other common erectile dysfunction (ED) medications like Sildenafil (Viagra) and Tadalafil (Cialis). Vilitra (Vardenafil) works within 25-60 minutes. Sildenafil (Viagra) takes 30-60 minutes. Tadalafil (Cialis) takes 30-45 minutes but has a longer duration. 2. Duration of Effect Vilitra lasts 4-6 hours (similar to Sildenafil). Tadalafil has the longest effect, lasting up to 36 hours. Sildenafil lasts 4-6 hours. 3. Vilitra at Lower Doses Vardenafil is more potent than Sildenafil, meaning lower doses can be effective. This can reduce side effects compared to Sildenafil. 4. Food Interaction Vilitra is less affected by food than Sildenafil. High-fat meals delay Sildenafil absorption more than Vardenafil. 5. Side Effects Common Side Effects: Headache, dizziness, flushing, nasal congestion. Vardenafil (Vilitra) may have fewer visual disturbances than Sildenafil. Which One to Choose? Vilitra (Vardenafil): Best if you want fast action, fewer side effects, and moderate duration. Sildenafil (Viagra): Best if you need a widely tested, short-term ED solution. Tadalafil (Cialis): Best for long-lasting effects or daily use.