Taking other medicines: If the patient is taking any other medicines, including medicine taken without a prescription, consult a pharmacist or doctor before use. Examples include medicine to treat fungus e.g. ketoconazole, antibiotics e.g. erythromycin, medicine to treat stomach acidity e.g. cimetidine, medicines that can affect the liver.
Laboratory tests: If the patient is scheduled to have any skin tests for allergies, the patient should not take Clarityne for two days before.
Pediatric population: Interaction studies have only been performed in adults.