"So this month you got the one that was manufacturer X, the next month it's manufacturer Y, the month after that you got manufacture Z," said Dr. Rana Said, a pediatric neurologist. "So it's the switching that really causes all the problems."
Another wrinkle: About half of generics are made by the company that also makes the name brand of the drug. They're called "authorized generics," and they're exactlyt the same, except maybe they're a different color.
These days, Sassee Ann Arnold asks her doctor to write "do not substitute" on her prescriptions. If you want to get a specific brand -- or generi c-- medication, you should do the same.
While there is no official list, the following drugs are generally accepted to have a narrow therapeutic index.
Thyroid medications: Brand-name: Levothroid, Levoxyl or Synthroid Generic: Levothyroxine
Blood thinners: Brand-name: Coumadin Generic: Warfarin
Heart medications: Brand-name: Digitek, Lanoxin Generic: Digoxin
Psychiatric drugs: Brand-name: Eskalith, lithobid Generic: Lithium
Antiseizure Medications: Brand-name: Dylautin Generic: Phenytoin
Brand-name: Tegretol Generic: Carbamazepine