2 Jul 2009
Generally it is not recommended that drugs are used past their expiry date. This is because the manufacturer can no longer guarantee their safety or efficacy. In this case Promethazine starts destabilising once the bottle is open and exposed to oxygen making it less effective. If you were to use the expired medicine it will probably be ineffective.
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If the expiration date on the foil of my Microgestin FE 1/20 pack says it expires 11/2011, is it still safe and potent beyond that date?
1 answer • 13 Mar 2011
What kind of chemical breakdown occurs after the expiration date is reached, and how long after the expiration date can you take the medication? What ...
2 answers • 3 Aug 2011
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1 answer • 3 Sep 2011
1 answer • 12 Dec 2013
Expiration date is just about two years past. Will it be effective enough for pain from a recent tooth extraction?
1 answer • 20 Apr 2015