Too much alcohol can be bad for you. Find out the recommended limits for men and for women, and for other groups of people such as under 18s, 18-25 year olds, seniors ...
Although Viagra is considered to be the most common medication for ED, there are quite a few on the market. They all work by improving blood flow to the penis so that you can get and maintain an erection long enough to have sex.
Sildenafil citrate is designated chemically as 1-[[3-(6,7-dihydro-1-methyl-7-oxo-3-propyl-1 H -pyrazolo [4,3- d ] pyrimidin-5-yl)-4-ethoxyphenyl] sulfonyl]-4-methylpiperazine citrate and has the following structural formula:
Cialis , Levitra , and Viagra are all in a class of drugs called PDE-5 inhibitors . These drugs work by blocking an enzyme called phosphodiesterase type 5. They also boost a chemical in your body called nitric oxide . This action encourages the muscles in your penis to relax. Relaxed muscles allow blood to flow freely so that when you’re aroused, you can get an erection. It also helps you maintain the erection long enough to have sex.