I do not agree with the previous post about the generic being fine. I was as tri-sprintec and then the pharmacy filled an other OTC genreic and I did not like it.
The generic will have the same active ingreient, but can use different binders and fillers, which is what makes the generics differ from each other.
I would sy try it for a 2-3 months and if it doesn't suit you try another genreic or have your doc write a prescription for the brand name...you may have to pay more for it though.
The biggest side effect was that my boobs grew a cup size, but I didn't gain much weight other than that.