Up to 4x/day: Since you did not provide any info on your condition, the answer can only be a general one. Do note that antihistamine alone does not provide decongesting effect if you have nasal congestion for which a nasal steroid or nasal antihistamine will likely work far better.
Answered 5/2/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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