Over-the-Counter Allergy Medications Explained: From Zyrtec to Allegra
“This is a first generation antihistamine, which means it’s older, it crosses the blood-brain barrier a lot more, and there are more side effects associated with Benadryl,” Dr. Otsu says. She also notes that this medication stays active for about 46 hours. “It’s not a 24-hour medication, but it’s highly sedating and it can cause…
