However, the causes of ED in younger men may be different from the causes in older men. While few offer substantive proof of their effectiveness, a review of research from the University of the Western Cape in South Africa and the Cleveland Clinic concluded that five natural remedies showed promising results in treating ED. This medicine also works best when you take it an hour before sex on an empty stomach. There are a variety of conventional and alternative ways to address ED, and a combination of treatments that address the factors contributing to the condition can help people address their symptoms. The device consists of a cylinder that is placed over the penis and a hand pump that extracts air from the cylinder.In most males,* Viagra works within 1 hour after it’s taken. It’s possible that Viagra can begin working within 30 minutes of being taken. But other times, it may take up to 4 . How to Get Generic Viagra – Consumer Reports. An inexpensive blood pressure medication might be an option for some men who suffer from erectile dysfunction. By . You’ll typically take Viagra about 1 hour before sex. You can take the drug 30 minutes to 4 hours before you anticipate sexual activity. Based on how well you respond to this .