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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1 answer • 8 Sep 2009
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
I have an unopened bottle of maximum strength biotin that has the expiration date of May 2013. Would it still be safe to take?
0 answers • 23 Aug 2014