Generic Viagra has been introduced for mending the complication of ED; hence, one needs to use the dosage appropriately. In intake of any drugs one need to seek a guidance of the doctor; since, they are the one to decide best and better for you. Biotech Pro It has been prescribed to use one pill in a day, proceeding more than that perhaps found harmful for the health. One needs to consume the pills one hour prior of sexual intercourse; since, it takes 30 minutes to get react; where the effect lasts for 4 to 5 hours. One can take full pleasure of their sexual life for 4 to 5 hours without any barriers. Take the pills when you feel an urge of sex, taking it on a daily basis may found fatal for your health. One needs to maintain a 24 hours gap between the pills.