Viagra

Viagra is a drug used for the therapy of erectile dysfunction (ED), which is a condition that makes it hard for a man to attain or maintain an erection.

The active ingredient in Viagra is Sildenafil. It boosts the blood flow to the penis, thereby helping a man obtain and maintain an erection when sexually aroused.

Viagra is usually taken around 30 minutes to 1 hour before sexual activity; however, it will not work if there is no sexual stimulation.

Levitra

Levitra is a prescription medication used to treat erectile dysfunction (ED) in men. It works by increasing blood flow to help achieve and maintain an erection. Known for its fast onset and reliability, Levitra is ideal for use 30–60 minutes before sexual activity. It lasts up to 5 hours and is well-tolerated by most men

Cialis

Cialis, also known by its active ingredient tadalafil, is a prescription medication primarily used to treat erectile dysfunction (ED), also known as impotence. It is also used to treat the symptoms of benign prostatic hyperplasia (BPH), which is an enlarged prostate. Cialis works by increasing blood flow to the penis during sexual stimulation, helping men achieve and maintain an erection.