I recently purchased some tadalafil from 4rx.com. It is not having any effect. I have been ordering branded cialis from kwikmed several times that works great but @$30 a pill it is quite expensive. I see threads on here about cipla being a legitimate generic but others like HAB are worthless. I was wondering how do I tell which kind I got, and what is the best way to go about contacting 4rx and getting the working cipla brand in exchange?