Posted by Cam W. on February 26, 2000, at 22:03:03
In reply to effexor freshness prilosec, posted by Ray on February 26, 2000, at 13:39:11
Ray - 1) Yes, Effexor has a shelf life. The expiry date would be on the bottle from the manufacturer. If the Effexor was from a pharmacy the shelf life would be hard to estimate (eg depends on how long the pharmacy had the bottle before using it to fill your prescription). A rule of thumb I use for precription bottles with no expiry dates is the meds are good for 1 & 1/2 years from the filling date. At the expiry date the drug is at least 95% of it's original potency. Most companies expire their drugs at 97-98%.2) The Effexor and Prilosec are metabolized by the same metabolic pathway in the liver; the cytochrome P-450-3A (CYP-3A3/4). While Effexor inhibits this pathway in very minor way, the increases in Prilosec plasma concentrations would be minimal and not clinically significant. Prilosec is neither a significant inhibitor or inducer of this metabolic pathway. In short, no, the Prilosec will not affect the Effexor and vice versa. - Hope this helps - Cam W.
poster:Cam W.
thread:24100
URL: http://www.dr-bob.org/babble/20000220/msgs/24185.html