When teaching a patient who will be receiving antihistamines, the nurse will include which instructions? (Select all that apply.)

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Antihistamines should be taken with food, even though this slightly reduces the absorption of the drug, so as to minimize the gastrointestinal upset that can occur. Over-the-counter medications must not be taken with an antihistamine unless approved by the physician because of the serious drug interactions that may occur. Drinking extra fluids will help to ease the removal of secretions, and activities that require alertness, such as driving, must not be engaged in until the patient knows how he or she responds to the sedating effects of antihistamines.

When Teaching a Patient Who Will Be Receiving Antihistamines, the Nurse