-ViagraSildenafil (Pfizer): relaxes muscles and increases blood flow to the penis. In cases of partial impotence, the medication can stimulate the penis to produce erections that last 40-60 minutes. The effects can last for up to six hours. This medicine is not recommended for heart patients.

-UprimaAbbott Laboratories' (apomorphine) acts on the central nervous systems, which facilitates the stimulation of the brain and penis. Sublingual oral administration of apomorphine produces erection in 10-20 minutes. Heart patients can use this product, although it may cause nausea, headaches, dizziness and fainting.

-CialisEli Lilly manufactures Tadalafil, which acts directly on the penis and inhibits the enzyme phosphodiesterase. It can lead to a 30-minute erection that can be sustained for up to 36 hours. It can cause headaches, nausea, vomiting, stomach upset, back pain, muscle pain and dizziness. Viagra cannot be used to treat heart disease with nitrates.

-LevitraBayer and Glaxo's (Vardenafil), also directly and selectively affect the penis. It inhibits the enzyme phosphodiesterase and causes a headache, flushing, and runny nose. It can lead to a 15-minute erection and lasts up to eight hours. Viagra and Cialis cannot be used to treat heart disease with nitrates. The main advantage is that they are sold in single packs and at a low price.

https://www.cenforcepills.com/product/silditop-100-mg/