That relentless itch... or maybe a sudden sneezing fit. When allergies strike, Benadryl can feel like a lifesaver. But how long do you have to wait for relief? The answer isn't always instant, but here's the breakdown:
Generally, you can expect Benadryl (diphenhydramine) to start working within **15 to 30 minutes** after taking it orally. You should experience peak effectiveness in about **1 to 2 hours.** This means the worst of the symptoms should subside around then.
However, individual responses vary. Factors like your metabolism, weight, and whether you've eaten recently can all influence how quickly Benadryl kicks in. Remember to always follow the dosage instructions on the label and talk to your doctor if you have any concerns, especially if your symptoms don't improve or worsen.
