If you're allergic to benadryl diphenhydramine can you take nyquil doxylamine succinate?

Benadryl allergy ?: A true allergy to Benadryl does not necessarily mean an allergy to NyQuil, as the antihistamine ingredients are not the same, but check with your primary care physician prior to taking NyQuil, as he/she knows your personal history.

Probably: Theoretically, yes, since the two medications have different molecular structure. I would recommend consulting your personal physician if you have any further concerns, since he/she should be well acquainted with your medical history, medications and allergies, etc.