zyrtec and Aplitest Interactions

Interactions between zyrtec(cetirizine) and Aplitest (tuberculin purified protein derivative)

tuberculin purified protein derivative and cetirizine (Moderate Drug-Drug)

ADJUST DOSING INTERVAL: Antihistamines may diminish the response to diagnostic skin test antigens. Falsely insignificant or false-negative results may occur in such patients.

MANAGEMENT: Antihistamines should be discontinued approximately 2 to 4 days prior to skin testing procedures.