Impotence or Erectile Dysfunction is very common among men nowadays and is defined as sexual dysfunction where man is not able to develop or maintain successful erections of penis to satisfy partner. There might be many underlying causes of impotence but most of them are treatable.
Viagra, first FDA approved oral impotence treatment doesn’t directly cause penile erections rather responds to sexual stimulation and arousal. Sildenafil in Viagra works to relax the smooth muscle of the penis and regulates blood vessels during sexual stimulation. It takes up to 1 hour to get active and action lasts up to 4 hours.
Levitra, the second impotence treatment approved by FDA in early 2003, is taken 30 to 60 minutes prior to sexual activity. Levitra is a new generation anti impotence pill that works for longer duration than Viagra and comes in dosages of 5mg 10mg and 20mg.
Cialis is latest FDA approved erectile dysfunction treatment. Cialis has achieved a higher success rate and its effects can last long up to 36 hours. It takes only 30minutes to start its action. It has proven to be excellent drug among men.
All of above treatments are approved only for men. Also, these are available only on private prescription by legal doctor and you cannot buy them over the counter. Before you decide to buy any of above impotence treatment, make sure that you have a complete medical history and physical examination to diagnose impotence, determine underlying causes and identify appropriate treatment.