9VIAGRA (Sildenafil) belongs to a gaggle of medicines called phosphodiesterase type 5 inhibitors. it's used for the treatment of male erectile dysfunction (male impotence). It helps to realize and keep an erection sufficient for sexual intercourse. It does this by allowing a greater blood flow into the penis when a person is sexually aroused. It works only with sexual stimulation and doesn't increase concupiscence.
Medical instructions should be strictly adhered to when taking this medication this book is just a guide on what viagra really is.

This Book Is Well Detailed About The Adequate Usage Of Viagra For Effective Functioning
It Also Teaches The Relationship Between Viagra And Alcohol In The Treatment Of Erectile Dysfunction