Do doctors prescribe narcotic cough syrup for an allergy cough.?

if so what symptoms are required in order to get prescribed it.
My son have a allergy cough at night and i wanted to know what they will prescribe him, hes 17.
Answers:
Usually not. Allergy cough is usually due to postnasal drip, so the initial therapy is antihistamine and nasal steroids.

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