Can You Take Claritin and Zyrtec Together?

Claritin and Zyrtec are two antihistamines that should not be taken together, states BJC HealthCare. Patients can take either Claritin or Zyrtec, or take each one on alternating days, always drinking lots of water. Patients who have prostate problems or difficulty holding their urine should not take either medication.

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