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| Alprostadil | a pharmaceutical drug that dilates the blood vessels. Used in impotence injections. |
| Andropause | condition caused by decrease in testosterone levels (male menopause). |
| Anejaculation | the inability to ejaculate. |
| Angina | severe chest pain usually caused by lack of oxygen to the heart muscle. |
| Anorgasmia | failure to experience an orgasm. |
| Apomorphine hydrochloride | pharmaceutical name for Uprima. |
| Artery | blood vessel that circulates blood from the heart around the body. |
| Cardiovascular | concerning the heart and blood vessels. |
| Cholesterol | a fatty substance that is a source of fuel and contributes to cell structure, the manufacturing of hormones and other body functions. |
| Cialis | prescription pill for the treatment of impotence (erectile dysfunction). |
| Corpus cavernosum | two parallel columns of spongy tissue in the penis involved in erections. |
| Diabetes mellitus | a chronic disease associated with high blood sugar. |
| Dyspareunia | pain or extreme discomfort in the genital area, particularly the vagina, during sexual intercourse. |
| Ejaculate | the fluid (semen) released from the penis during ejaculation. |
| Erectile dysfunction | the inability to achieve or maintain an erection sufficient for the completion of sexual intercourse. See impotence. |
| Erection | a hard or rigid penis. |
| Hypertension | high blood pressure. |
| Hypotension | low blood pressure. |
| Hysterectomy | an operation to remove the uterus. |
| Impotence | the inability to achieve or maintain an erection sufficient for the completion of sexual intercourse. See erectile dysfunction. |
| Interaction | the process of two drugs acting on each other. |
| Levitra | prescription pill for the treatment of impotence (erectile dysfunction). |
| Libido | sexual desire or sex drive. |
| Menopause | the physical and hormonal changes that occur in women when menstruation stops. |
| Nitrate | a form of nitric oxide that dilates the blood vessels to the heart. |
| Nitroglycerine | a nitrate medicine for the relief of chest pain (angina) |
| Orgasm | the climax of excitement during sexual activity. |
| PDE5 (Phosphodiesterase Type 5) Inhibitor | an enzyme that helps dilate blood vessels. |
| Peyronie's disease | a condition that causes the penis to curve unnaturally. |
| Placebo | a dummy medicine that has no physiological effect. |
| Postmenopausal | the time following menopause. |
| Premature ejaculation | ejaculation that occurs soon after erection. |
| Priapism | an erection that fails to subside after ejaculation or occurs without sexual stimulation. Usually involves pain and tenderness of the penis. |
| Prostate | gland at the base of the bladder and surrounding the urethra. |
| Prosthesis | an artifical device to replace a damaged or missing part of the body. |
| Psychogenic | originating in the mind. |
| Sexual Dysfunction | a problem or abnormality associated with sexuality. |
| Side effect | a reaction to a medicine. |
| Sildenafil citrate | pharmaceutical name given to Viagra. |
| Symptom | sign of an illness or medical condition. |
| Tadalafil | pharmaceutical name for Cialis. |
| Testosterone | a hormone that produces male characteristics. |
| Uprima | prescription pill for the treatment of impotence (erectile dysfunction). |
| Urethra | the tube through which urine is passed from the bladder. |
| Vaginismus | an involuntary contraction of the vaginal muscles making sexual intercourse difficult or impossible. |
| Vardenafil | pharmaceutical name for Levitra. |
| Viagra | prescription pill for the treatment of impotence (erectile dysfunction). |