This activity provides healthcare professionals with an in-depth review of diphenhydramine, a first-generation antihistamine commonly prescribed to manage allergic disorders, insomnia, pruritus, urticaria, vertigo, motion sickness, and dystonias. Clinical applications, mechanism of action, adverse effects, contraindications, and off-label uses receive focused attention, ensuring healthcare professionals understand the broad range of conditions where diphenhydramine may play a role. Pharmacokinetics, administration strategies, and clinically significant drug interactions are reviewed to support safe and effective prescribing practices.
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