Dry cough allergy medicine: what should you know?

An antihistamine may reduce sneezing, itching and a runny nose. A nasal treatment may reduce inflammation and drainage from allergic rhinitis when used correctly and consistently. Neither option treats every cause of cough, and a cough with wheeze or chest tightness may need an asthma assessment.

Cough syrups can have different ingredients and may cause drowsiness, dry mouth or interactions with other medicines. Read the active ingredients so you do not combine products with the same ingredient. Children, older adults, pregnant people and those with long-term conditions need tailored advice.

Tell a pharmacist about your age, symptoms, pregnancy or breastfeeding, asthma, glaucoma, prostate problems and regular medicines. Follow the product directions and use nasal sprays with the technique shown by the pharmacist. Avoid driving if a medicine makes you sleepy, and do not use a decongestant spray longer than its instructions allow.

Reduce exposure to the suspected allergen as well: wash after outdoor activity, manage indoor dust and keep away from smoke. If treatment does not help, reassessment is more useful than adding several products.

Seek clinical advice for a persistent cough, repeated night symptoms, wheeze, chest tightness or reduced exercise tolerance. Call emergency services for swelling of the mouth or throat, severe breathing difficulty, faintness or a rapidly spreading allergic reaction.

Ask which symptom the recommended medicine targets, when to expect benefit, how long to try it and what side effects require action. Ask whether reflux, asthma or infection could explain the cough instead.