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Chronic Cough

A chronic cough lasts eight weeks or longer in adults and is most often caused by postnasal drip, asthma, or acid reflux. Identifying the underlying cause is the key to effective treatment.

PulmonaryENT
A chronic cough is one that lasts eight weeks or longer in adults. Beyond being exhausting, it can disrupt sleep, strain chest muscles, cause hoarseness or urinary leakage, and interfere with work and social life; many people also worry that something serious is being missed. The encouraging news is that in the large majority of people, a specific cause — and often more than one — can be identified and treated successfully with a stepwise approach. Causes: Three conditions account for most chronic cough in nonsmokers with a normal chest X-ray, and many patients have more than one:
  • Upper airway cough syndrome (postnasal drip): Mucus dripping down the back of the throat from allergies or chronic postnasal drip triggers throat clearing and cough.
  • Asthma: Cough-variant asthma may cause coughing as the only symptom, often worse at night, with exercise, or in cold air.
  • Acid reflux: GERD and its throat-focused form, laryngopharyngeal reflux, can irritate the airway even without heartburn.
  • Other causes: Smoking, ACE-inhibitor blood pressure medications (such as lisinopril), chronic bronchitis, infections that leave a lingering cough, and, less commonly, lung disease or tumors.
Diagnosis: Evaluation begins with a careful history — smoking, medications, heartburn, allergies, and the cough's timing — and a physical exam. A chest X-ray is usually obtained to exclude structural lung disease. Because the common causes do not always announce themselves, doctors often treat the most likely culprit first and use the response as a diagnostic clue. Breathing tests (spirometry) check for asthma, and further testing such as CT imaging or specialist referral is reserved for cough that resists initial therapy or comes with warning signs. Treatment: Treatment targets the underlying cause, and improvement may take several weeks:
  • For postnasal drip: Nasal steroid sprays such as fluticasone, antihistamines, and saline rinses calm the upper airway.
  • For asthma: Inhaled corticosteroids and bronchodilators; montelukast is sometimes added for allergic or cough-variant asthma.
  • For reflux: Acid-suppressing medication such as omeprazole, along with weight loss, avoiding late meals, and elevating the head of the bed.
  • Medication review: If an ACE inhibitor is the trigger, switching to a different blood pressure medication typically resolves the cough within a few weeks.
  • Smoking cessation: Essential — a smoker's cough that changes character warrants evaluation, not reassurance.
What to Expect from Treatment: Because more than one cause is often present, treatment is frequently layered: a nasal spray and an acid reducer together, for example, when both postnasal drip and reflux contribute. Each therapy needs an adequate trial — usually two to eight weeks — before judging whether it worked, so patience and follow-up visits are part of the plan. Keeping a simple diary of cough triggers, timing, and severity helps your doctor see which treatment is moving the needle. When standard causes have been excluded and treated, some people are left with a hypersensitive cough reflex, for which specific reflex-calming therapies and speech-therapy techniques can help. When to Seek Care: See a doctor sooner for a cough with blood, unexplained weight loss, night sweats, hoarseness lasting more than three weeks, shortness of breath, or a history of heavy smoking. These features call for prompt imaging rather than trial-and-error treatment. A cough that has dragged on for months is rarely something you must simply live with. The internal-medicine team at Zimmer Medical Group works through the causes of chronic cough systematically — schedule a visit to start the evaluation.

Related Medications

Commonly prescribed medications for this condition

OmeprazoleFluticasoneMontelukast

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