Benadryl Side Effects on Brain Health and Dementia Risk First-generation antihistamines like diphenhydramine (Benadryl) block histamine but also strongly block acetylcholine, a neurotransmitter essential for attention and memory. That anticholinergic effect explains many of the cognitive risks. 🧠 Memory problems and slower thinking Diphenhydramine crosses the blood–brain barrier and impairs attention, working memory, and reaction time. Controlled studies show worse vigilance and cognitive perfo

If you’re still using Benadryl, you need to watch this video. It’s time to update your allergy action plan. Benadryl is linked to early-onset dementia. Talk with your child’s doctor about antihistamine options with fewer side effects. In a recent study with MomLife and Kaléo, many moms report they are still using Benadryl (diphenhydramine) as a first-line treatment for severe allergy symptoms. Always use epinephrine first. Our new action plan can help you know when a reaction is mild vs severe,

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