Not an allergy: Nitrous oxide is a gas & you can't be allergic to it, but you can have a reaction to it. As an inhaled anesthesia it can irritate & trigger cough. If she is not hearing well out of one ear she likely has Eustachian tube dysfunction and a bit of middle ear fluid accumulation. This should all pass within a few days.
Answered 10/10/2018
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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
A doctor has provided 1 answer
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