Viagra 150 mg has passed all clinical trials and in laboratory conditions, its effectiveness and positive effects on the sexual health of men has been proven. The drug guarantees a long and high-quality erection. Sildenafil has a fairly high price, but this is due, firstly, to the sufficient popularity of the drug, and secondly, to the cost of the patent. Nevertheless, there is a more budget-friendly version, an analogue of the drug — Generic Viagra 150 mg. It has a similar chemical composition and also has passed all clinical trials.