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Diphenhydramine should never be taken when a monoamine oxidase inhibitor (MAOI), such as isocarboxazid, tranylcypromine and phenelzine, has been taken within the previous 14 days. Other drugs that may interact with this medication include: alprazolam, diazepam, chlordiazepoxide, temazepam, triazolam, amitriptyline, doxepin, nortriptyline, fluoxetine, sertraline and paroxetine. Diphenhydramine also may interact with other medications that make you feel drowsy or sleepy. Alcohol may increase the dizziness or drowsiness side effect of diphenhydramine. In general, you should talk to your doctor before taking any new medications, vitamins, minerals or herbal products. Some other medications may contain an active ingredient that works similarly to diphenhydramine. Taking them at the same time as this medication could lead to an overdose of antihistamines.
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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.