Patients taking antihistamines should receive the following information and instructions:

• Antihistamines are prescribed to reduce allergic symptoms.
• Patients should be questioned regarding a history of glaucoma, peptic ulcer, urinary retention, or pregnancy before starting antihistamine therapy.
• Patients should be told not to take alcohol, sleeping pills, sedatives, or tranquilizers while taking antihistamines.
• Antihistamines may cause drowsiness, dizziness, dry mouth, blurred vision, weakness, nausea, headache, or nervousness in some patients.
• Patients should avoid driving a car or working with hazardous machinery until they assess the effects of this medicine.
• Patients should be told to store this medicine in a tightly closed container in a dry, cool place away from heat or direct sunlight and out of the reach of children.

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