4 Oct 2012
Yes, it's fine to take diphenhydramine with Coumadin. There is no known interaction between these medicines. However, it does not mean that no interaction exist so if you do appear to have any odd symptoms please see your doctor.
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I am prescribed Allegra and took one five hours ago but it doesn't seem to be working. Can I take diphenhydramine HCI 25mg now?
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