Medications for erectile dysfunction (ED) include Viagra, Levitra and Cialis. These drugs work by increasing the presence of nitric oxide, a chemical that dilates the blood vessels in the penis, thus improving blood flow and leading to an erection. Talk to your doctor about which ED medication may be appropriate for you.
Viagra (Sildenafil)
Viagra is an ED drug manufactured by Pfizer. It is a PDE5 inhibitor that also works by promoting nitric oxide production. A lower dose is generally recommended for men over the age of 65, those with serious liver or kidney damage, certain heart problems requiring the use of nitrates, or those being treating for HIV infection. Viagra does not protect against sexually transmitted disease, and should not be used in conjunction with Revatio, a similar chemical compound. Viagra's effects last up to four hours--anything beyond this should be reported to a physician immediately.
Levitra (Vardenafil)
Levitra is another PDE5 inhibitor, and is manufactured by GlaxoSmithKline. Levitra is chemically similar to Viagra. The same precautions should be taken with Levitra as directed with other PDE5 inhibitors. However, Levitra is FDA-approved specifically for men with medical conditions related to high cholesterol, high blood pressure and diabetes.
Cialis (Tadalafil)
Cialis is an ED medication manufactured by Lilly. Cialis is similar to other ED medications, but this drug is long-acting--up to 36 hours in a single dose. Cialis does come with an additional warning in which strain to the heart over this extended period can cause considerable complications for those with pre-existing heart conditions.
