What is the duration of action for a single dose of Diphenhydramine, and how frequently should it be administered to provide consistent symptom relief?
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What is the duration of action for a single dose of Diphenhydramine, and how frequently should it be administered to provide consistent symptom relief?
Diphenhydramine typically lasts 4-6 hours. For ongoing symptom relief, it’s generally taken every 4-6 hours as needed.