Viagra is administered orally, typically in dosages ranging from 25 mg to 100 mg. However, it is important to note that viagra wiki does not increase sexual desire; it only helps to maintain an erection when sexual stimulation occurs. It is advised to take the medication about one hour before sexual activity, and its effects can last up to four hours. The cultural impact of Viagra has been significant, changing the landscape of sexual health and relationships for many. It has helped ...