One of the greatest impotence medications for successfully ruling out erectile dysfunction is kamagra effervescent.  One of the useful compounds in this powerful impotence medicine is sildenafil citrate, which opens up the blood channels in the penis and heart.  Making blood flow throughout the penile area is this compound's slogan. Men can easily acquire and maintain a rigid penis when it is packed full of blood.  Men's impotence symptoms can be lessened by using this medication as directed. For this impotence medicine to be effective, the recommended dosage and duration must be followed.