Oral medicines for ED usually work well and cause few side effects. These include Cialis Tadalafil , Spedra Avanafil , and Levitra Vardenafil , which are also PDE5 inhibitors that work in a similar way to sildenafil and are also available online in tablet form on prescription. Its effect of improving blood circulation around the body has several uses, the best known of which is increasing the blood flow to the penis and therefore helping those with erectile dysfunction to achieve and maintain an erection for sexual activity. These generic versions are chemically identical to the original but may vary in non-medicinal ingredients or color, taste, and shape. His profound dedication and commitment to enhancing men’s well-being have solidified his reputation as a trusted authority in the field. It lasts 4 to 5 hours, or longer if you have mild to moderate ED. An inherited eye disease that affects the retina. · 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 .