Many people use impotence to refer to erectile dysfunction, in fact, these two terms are quite different. ED is the repeated inability to get or keep an erection firm enough for sexual intercourse.
However, impotence may also be used to describe other problems that interfere with sexual intercourse and reproduction, such as lack of sexual desire and problems with ejaculation or orgasm. Using the term erectile dysfunction makes it clear that those other problems are not involved.
Source: National Kidney and Urologic Diseases Information Clearinghouse
Impotence and Erectile Dysfunction are the same thing. They’re both the inability to gain and maintain an erection.
Whether you take more than 4 hours distance there is not notable risk for it. This will make you full strong and longer erection and libido. Erectile dysfunction and worse libido can be fixed by Horny Goat Weed.