Erectile Dysfunction Defined If you need viagra 100mg viagra for sale Laboratory tests include an evaluation of the patient's hormone status, particularly if the symptom is diminished or absent libido. Here you can buy viagra without prescription viagra without prescription Excessive alcohol use has long been recognised as one cause of impotence, leading to the euphemism "brewer's droop"; Shakespeare made light of this phenomenon in Macbeth. References Erectile dysfunction, sometimes called "impotence," is the repeated inability to get or keep an erection firm enough for sexual intercourse. The word "impotence" may also be used to describe other problems that interfere with sexual intercourse and reproduction, such as lack of sexual desire and problems with ejaculation or orgasm. Using the term erectile dysfunction makes it clear that those other problems are not involved.