PM: Benadryl (diphenhydramine) life is about 20 hrs. Although Loratadine is a more specific H-1blocker, may add a bit but should be OK.
Answered 2/5/2015
3.3k views
Probably ok: You may be doing double duty on the antihistamine, so if you have a non-"pm" pain reliever that might be better, but most likely you'll be fine if you take them both. There's no absolute contraindication to combining them.
Answered 11/6/2015
3.3k views
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