A female asked:
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is it safe to take zyretec-d 12 hr relief after i took loratadine 10mg 3 1/2 hours ago? i havent taken zyretec-d in 15 hours

1 doctor answer
Dr. Robert Kwok
32 years experience Pediatrics
Mixing antihistamine: Generally, it's best to follow one's doctor's instructions. If taking a double-dose of antihistamine (a Zyrtec and a Claritin) once in a while, there should not be any noticeable problem. Also, if taking a 12-hour decongestant (the D in Zyrtec-D) and not having too fast of a heart rate nor any shakiness, then taking another dose after 12 or more hours should not cause a problem.
Answered on Aug 19, 2017

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