Erectile dysfunction is the most common sex problem that men report to their doctors. It affects as many as 30 million men. ED is defined as trouble getting or keeping an erection that's firm enough for sex. Many medications to treat erectile dysfunction problems such as Valif 20. Though it's not rare for a man to have some problems with erections from time to time, ED that is progressive or happens routinely with sex is not normal, and it should be treated. 

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Erectile dysfunction (ED) is defined aspersistent difficulty achieving and maintaining an erection sufficient to have sex. Causes are usually medical but can also be psychological. In addition to Viagra, other ED drugs available in the United States include avanafil,
tadalafil (Vidalista 20, Tadalista 20, Tadacip 20)and Sildenafil (Kamagra 100, Fildena 100, Cenforce 100, Caverta 100). These all improve blood supply to the penis.