Yes, as JW says there is a potential for a psychological addiction to Benadryl™ (diphenhydramine), and a slow tapering of he daily dose is recommended. Some people with chronic allergies need to take Benadryl on a daily basis, but the total dose (when taken on a chronic basis) is usually under 100mg/day.

Why do you feel you need to take Benadryl so often; is it the drowsiness (anticholinergic) effect you are looking for, or something else? (just curious) - Cam