ED can be cured. The therapy your family doctor and you give preference to is determined by the cause of ED and your way of life. Significant progress in medicine has increased the number of options available to treat erectile dysfunction effectively. One of the most efficacious means is medications.
Sidenfil (Viagra) has been developed for males suffering from sexual disorders. Two more oral drugs, vardenafil (Levitra) and tadalafil (Cialis) were approved by the U.S. Food and Drug Administration in 2003.

How does Viagra work?
The drug relaxes the walls of the penis, so blood flow to the organ soars. As a result, there can be a few erections within a few hours. Viagra is efficacious, if the man is sexually stimulated, and does not cause an erection by simply taking the drugs.

Drug interactions
Despite the fact that each medication has proved potent, none is cure-all. Moreover, they may bring about problems when interacted with other medications. Remember that drug-to-drug interactions with nitrates or nitroglycerin heart medications can lead to dangerous decrease in blood pressure, which can be fatal.
Dose
One blue pill is taken in 24 hours. Commonly it is efficient within 30 minutes to 1 hour and lasts around 4 hours.

Adverse side effects
Almost every drug has adverse side effects, even if you take it as prescribed. Viagra is no exception. Underneath are a few common adverse side effects you should be well-aware of before taking the medication. The commonest adverse side effects are pounding headaches, giddiness, upset stomach, redness in face, neck and/or chest and visual problems.

Contraindications
The drug is contraindicated in males with heart problems, physical deformities of the penis, in males with a predisposition to lengthy erections brought on by blood cell disorders, liver problems (particularly dangerous liver disorders), kidney problems and in people taking certain drugs used for HIV or those over 65. There have been cases when males using the medications died during sexual activity.