Expiration date 03/2002. The medication that did not prove helpful to me is the generic replacement for Sinemet. I have appoximately 440 tablets that I cannot use. Th e reason being that I asked my neurologist to write me a prescrition for these tablets because I had a concern about the possible harm that taking approximately 14 of the 25/100 daily might be causing because of an excess amount of the carbidopa component. When I substituted the lower level carbidopa blue tabs for my yellow higher level tabs; I immediately had a marked drop in effectiveness, and before the week was over, I found that even substituting only one of the blues in such a way that I got fully as much Levoddopa as I had been used to, I got an in adequate response . I have insurance that covers my purchase of meds and requires me to order a 90 day supply ; and so I was left with these pills. I expect to be off list for the next 3-4 weeks; so it will work out best if you send me E-mail off list. My address is <[log in to unmask]> My dearest wife and caregiver will be getting a 2 week respite from her constant concern for me,