Treating an allergy cough involves avoiding the substance that causes the allergic reaction, use of antihistamines and decongestants, and the use of prescription medication, reports WebMD. While both colds and allergies cause coughs, colds last a maximum of 14 days while an allergy cough can continue all year.
If the person with an allergic cough knows the allergen that triggers the response, he is sometimes able to avoid it. Common allergens that cause a cough include pollen, dust mites, mold and animal dander, according to WebMD. If dust mites cause the cough, reducing the dust in a home is often helpful. With pollen, the individual avoids the allergen by staying inside when counts are high.
While antihistamines and decongestants are useful at reducing allergy symptoms, they also interact with other medications. Before taking these medications, WebMD recommends checking with the doctor. Antihistamines block substances that form in the body from causing congestion and excess mucus. Decongestants reduce swelling of the sinus passages making it easier to breathe.
Available over-the-counter or by prescription help to reduce allergy cough, nasal steroids relieve congestion and swelling in the nasal passages, according to WebMD. Allergy shots involve injecting the patient with a small amount of the allergen. During the series of shots, the doctor increases the amount of allergen in the shot. If the shots are effective, the body develops an immunity to the allergen, so it no longer causes the symptoms.