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When administered concomitantly with alcohol, loratadine has no potentiating effects as measured by psychomotor performance studies.
Increase in plasma concentrations of loratadine has been reported with concomitant use of ketoconazole, erythromycin or cimetidine in controlled clinical trials, but without clinically significant changes (including electrocardiographic).
Drug/Laboratory Test: Clarityne Tablet should be discontinued approximately 48 hrs prior to skin testing procedures since antihistamines may prevent or diminish otherwise positive reactions to dermal reactivity indicators.
