It lasts 4 to 5 hours, or longer if you have mild to moderate ED. Can I buy ED pills online? When taken at the correct time and paired with sexual stimulation, the erection lasts long enough for successful intercourse. Testosterone replacement therapy can lead to an improvement of two points. Taking the two medications simultaneously could increase the hypotensive result of the alpha-blockers [5]. Erectile dysfunction can often be traced to the same causes as cardiovascular disease, including inflammation, a narrowing of the arteries, or a hardening of the arteries. Common side effects include headache, facial flushing, indigestion, and dizziness.Erectile dysfunction (ED) meds like Viagra have a long and storied history. Sildenafil (), in particular, was first created in as a medication meant to treat it soon became. Buy Generic Viagra: Online Pharmacy Options. The process of getting generic Viagra locally can be long, embarrassing, and a huge hassle. An online pharmacy can solve your problems and make it very easy to buy generic Viagra, and for great prices at can skip the local pharmacy and have your medication shipped discreetly right to your doorstep.  · Free Viagra samples are frequently offered for a brief period of time and can be requested via online forms or by getting in touch with the business. By taking advantage of these deals, people can.