This link provided in an earlier post in this thread is very interesting. I suggest all in both Canada and the U.S. read it entirely. It provides a great deal of information re the differences in generic and original formulas of meds as well as the unique opportunities afforded to Docs and Pharmacies by using one over another. I would also suggest you look at the companies that produce the generics and there history as a reliable source providing a safe product and the flexibility that are afforded in giving you a medication that is a equivalent. It might not be the same as they are given ranges as opposed to having be exact in the medication …. Yes the videos here about Gens Vs Original are good but the more information you are provided u will understand why medications work sometimes for some and not others.