I would suggest you check out the FDA page on myths and facts about generic drugs:
http://www.fda.gov/Drugs/ResourcesF...afely/UnderstandingGenericDrugs/ucm167991.htm
Espicially this part:
MYTH: FDA lets generic drugs differ from the brand name counterpart by up to 45 percent.
FACT: This claim is false. Anyone who repeats this myth does not understand how FDA reviews and approves generic drugs.
FDA recently evaluated 2,070 human studies conducted between 1996 and 2007. These studies compared the absorption of brand name and generic drugs into a persons body. These studies were submitted to FDA to support approval of generics. The average difference in absorption into the body between the generic and the brand name was only 3.5 percent [Davit et al. Comparing generic and innovator drugs: a review of 12 years of bioequivalence data from the United States Food and Drug Administration. Ann Pharmacother. 2009;43(10):1583-97]. Some generics were absorbed slightly more, some slightly less. This amount of difference would be expected and acceptable, whether for one batch of brand name drug tested against another batch of the same brand, or for a generic tested against a brand name. In fact, there have been studies in which branded drugs were compared with themselves as well as with a generic. As a rule, the difference for the generic-to-brand comparison was about the same as the brand-to-brand comparison.
Any generic drug modeled after a single, brand name drug (the reference) must perform approximately the same in the body as the brand name drug. There will always be a slight, but not medically important, level of natural variability just as there is for one batch of brand name drug to the next.
Brand name drug companies spend millions of dollars every year convincing doctors that only their product will work. (My favorite was when Protonix went generic and the drug rep came in to our pharmacy to tell us how much better brand name Protonix was than the generic. He was unaware that the makers of Protonix were also producing the generic...we would open a bottle of the generic and there would be little white pills with "PROTONIX" printed on them- so the brand and generic were literally coming off the same production line and the bottles were just labelled differently.)
I would talk to the doctors again and let them know the impact this is having on your life. You also might try going for a consult with a neurologist in another area or at a teaching hospital to get their input. (Prescibing habits can be very local.) I think the idea of switching to generic with a very slight increase in dose is a good idea too- although I think the benefit of the increased dose is probably more psycological than anything else.
All but one of the patients at our pharmacy has switched to generic Keppra, and we hardly do any brand name Depakote, Dilantin, Lamictal, or Topamax anymore. The one local neurologist that still worries a lot about generics always writes on his scripts "Patient may have generic, but must stay on the same manufacturer's generic unless physician is consulted about a change".
Good Luck!
http://www.fda.gov/Drugs/ResourcesF...afely/UnderstandingGenericDrugs/ucm167991.htm
Espicially this part:
MYTH: FDA lets generic drugs differ from the brand name counterpart by up to 45 percent.
FACT: This claim is false. Anyone who repeats this myth does not understand how FDA reviews and approves generic drugs.
FDA recently evaluated 2,070 human studies conducted between 1996 and 2007. These studies compared the absorption of brand name and generic drugs into a persons body. These studies were submitted to FDA to support approval of generics. The average difference in absorption into the body between the generic and the brand name was only 3.5 percent [Davit et al. Comparing generic and innovator drugs: a review of 12 years of bioequivalence data from the United States Food and Drug Administration. Ann Pharmacother. 2009;43(10):1583-97]. Some generics were absorbed slightly more, some slightly less. This amount of difference would be expected and acceptable, whether for one batch of brand name drug tested against another batch of the same brand, or for a generic tested against a brand name. In fact, there have been studies in which branded drugs were compared with themselves as well as with a generic. As a rule, the difference for the generic-to-brand comparison was about the same as the brand-to-brand comparison.
Any generic drug modeled after a single, brand name drug (the reference) must perform approximately the same in the body as the brand name drug. There will always be a slight, but not medically important, level of natural variability just as there is for one batch of brand name drug to the next.
Brand name drug companies spend millions of dollars every year convincing doctors that only their product will work. (My favorite was when Protonix went generic and the drug rep came in to our pharmacy to tell us how much better brand name Protonix was than the generic. He was unaware that the makers of Protonix were also producing the generic...we would open a bottle of the generic and there would be little white pills with "PROTONIX" printed on them- so the brand and generic were literally coming off the same production line and the bottles were just labelled differently.)
I would talk to the doctors again and let them know the impact this is having on your life. You also might try going for a consult with a neurologist in another area or at a teaching hospital to get their input. (Prescibing habits can be very local.) I think the idea of switching to generic with a very slight increase in dose is a good idea too- although I think the benefit of the increased dose is probably more psycological than anything else.
All but one of the patients at our pharmacy has switched to generic Keppra, and we hardly do any brand name Depakote, Dilantin, Lamictal, or Topamax anymore. The one local neurologist that still worries a lot about generics always writes on his scripts "Patient may have generic, but must stay on the same manufacturer's generic unless physician is consulted about a change".
Good Luck!