H? tr? c?i thi?n ch?t l??ng và s? l??ng tinh trùng, giúp t?ng ?? ??c tinh d?ch c?ng nh? t?ng c??ng kh? n?ng v?n ??ng tinh trùngtake medicines referred to as "nitrates" (for instance nitroglycerin) use Avenue drugs referred to as "poppers" for instance amyl nitrate or amyl nitrite, and butyl nitrate choose any medicines known as guanylate cyclas