Wellll................ I can tell you all that this Viagra is indeed a wonder drug. Just a little pill taken once or twice a week.... not more..... and you act like a 20 year old again. Im 50's and after a few times of feeling completely inferior to these gorgeous guys spreading their loins for you while there you are semi hard and going limp fast I finally said enuf. Time to do something about it . It's so easy in Pattaya 500 baht for 100mg. Every drugstore knows about it and has it no prob. But its more difficult in Bangkok I was in Sapan Kwai and they either were ignorant of it or refused to sell it . Better to go to patpong in Bangkok I think Pay 500 baht for 100mg and 400 baht for 50 mg Dont pay more. Believe me that lil blue pill works fine Even lasts me 3 days TRUE