# \[e-drug\] Expiry dates of drugs (cont'd) **URL:** \ **Category:** e-drug\ **Created:** [April 1, 2003, 6:08am UTC](https://talk.edrugplus.org/t/e-drug-expiry-dates-of-drugs-contd/16482 "2003-04-01T06:08:59Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![Dr\_Noorizan\_Abdul\_Az](https://avatars.discourse-cdn.com/v4/letter/d/9de053/32.png) [@Dr\_Noorizan\_Abdul\_Az](https://talk.edrugplus.org/u/Dr_Noorizan_Abdul_Az)\ **Post date:** [April 1, 2003, 6:08am UTC](https://talk.edrugplus.org/t/e-drug-expiry-dates-of-drugs-contd/16482/1 "2003-04-01T06:08:59Z")
E-drug: Expiry dates of drugs (cont'd) ------------------------------------------------------------------------- In my experience packaging may influence the integrity of tablets, as it may allow for entry of air, humidity and microorganisms, which can cause chemical and biological reactions. Furthermore, the process of tableting (pressure, heat, dryness, and sterility of the process) may all influence the expiry date. So, even though a manufacturer may follow the standards of processing, it still needs to evaluate the final product to determine the expiry date of a product, as all of the mentioned factors can effect the chemical composition and lead to less pharmacological benefit or more adverse reactions. Noorizan Abd.Aziz, B.Pharm, MSc, Pharm D Department of Clinical Pharmacy School of Pharmacy Science University Malaysia, 11800, Pulau Pinang, Malaysia.. -- To send a message to E-Drug, write to: e-drug@usa.healthnet.org To subscribe or unsubscribe, write to: majordomo@usa.healthnet.org in the body of the message type: subscribe e-drug OR unsubscribe e-drug To contact a person, send a message to: e-drug-help@usa.healthnet.org Information and archives: [http://www.essentialdrugs.org/edrug](http://www.essentialdrugs.org/edrug)