Anderson is a distinguished expert in men’s health, specializing in treatments for erectile dysfunction. This medication is taken with or without food an hour before sex. In men who take it in a fasted state, the median time it takes to activate is minutes. As with sildenafil, a high-fat meal or alcohol keep the body from absorbing it as quickly. These delicious flavored tables can be taken anytime without attracting unnecessary attention to what you take. · Brand names: Revatio, Viagra Drug classes: Agents for pulmonary hypertension, Impotence agents. Medically reviewed by Kaci Durbin, MD. Last updated . Viagra and Kamagra tablets: mg of Sildenafil: 1. Viagra tablets. 2. Kamagra tablets. 3. Kamagra Gold tablets (for severe ED stages) 4. Kamagra Chewable (flavored tablets) . – Updated October 25, Table of Contents Adverse reactions: Kamagra vs Viagra Conclusion A while back, Viagra was the only drug that helped men to fix erectile .