Caverta or Sildenafil citrate
Common uses
This medicine is a phosphodiesterase inhibitor used to treat sexual 
function problems such as impotence or erectile dysfunction. In combination with sexual stimulation, this medicine works by helping the blood flow into the penis to achieve and maintain an erection. This medicine is not intended for use in women or children. This medicine will not protect against sexually transmitted diseases including HIV infection. Use “safe sex” practices such as latex condoms. –>> Buy Caverta
Before using
Do not take his medicine if you are also taking or using nitroglycerin,