Is it just less effective, or could it be harmful?
Is it ok to use this product a year or two after the expiration date?
Question posted by Roddin on 13 Oct 2009
Last updated on 12 October 2009
dextromethorphan HBr, USP 10 mg with guaifensin, USP 100 mg
Could you please let us know what product you are talking about?
Then we can help you. Thanks
- Tussin DM uses and safety info
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