Sort of: In general, if allergy medications cease to control symptoms, it's not that the medication has gotten less effective, but rather that allergies have gotten worse. Antihistamines don't lose effectiveness with regular use and one is not likely to be tremendously more effective than another.
Answered 10/4/2016
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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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