So your insurance has made you switch to generics to get the lower copay - or you need to buy generics due to today's drug prices and today's economy. Whatever your reason for buying generics, you need to understand not all generics are created equally. They are not all the same.
All drugs have a rating. For example: Drugs with an AB rating are supposed to treat patients the same as the BRAND NAME drug does. However, the binder - that holds the drug together as a tablet, etc - does not have to be, and usually isn't the same as the BRAND NAME drug.
Let me explain it as a cookie. The BRAND NAME cookie is made with flour as its binder. The generic forms may also use flour but some might use wheat flour, corn meal, rye flour, or buck wheat flour. You would still get the chocolate chips and pecans in your cookie, but it definitely wouldn't be the same.
That is why some generics work as well as BRAND NAME, and some just don't. So if your generic isn't doing as well for you, maybe you need to try another brand of generic. You do not have to settle for not feeling as well as BRAND NAME worked and made you feel. Ask your pharmacist (who is hopefully our Gary) what brand of generics they used last time, tell him if you had problems with it, they can even put a note in your file so you won't get that brand again. Your health is what it's about.