Brief Answer:
Bronchitis

Detailed Answer:
Thank you for asking
Smokers have the possibility and odds of getting bronchitis ( bronchial infection) most likely. Response to antibiotics is insufficient as antibiotics alone are not enough.

You need a little work up for sorting out the etiology like
Complete blood count (CBC) with differential
Procalcitonin levels (to distinguish bacterial from nonbacterial infections)
Sputum cytology (if the cough is persistent)
Blood culture (if bacterial superinfection is suspected)
Chest radiography
Bronchoscopy (to exclude foreign body aspiration, tuberculosis, tumors, and other chronic diseases)
Influenza tests
Spirometry
Laryngoscopy (to exclude epiglottitis)

I want you to know that Therapy is generally focused on alleviation of symptoms. Care for acute bronchitis is primarily supportive. Care for chronic bronchitis includes avoidance of environmental irritants.

Agents employed for symptomatic treatment include the following:

Central cough suppressants (eg, codeine and dextromethorphan) – Short-term symptomatic relief of coughing in acute and chronic bronchitis
Short-acting beta-agonists (eg, ipratropium bromide and theophylline) – Control of bronchospasm, dyspnea, and chronic cough in stable patients with chronic bronchitis; a long-acting beta-agonist plus an inhaled corticosteroid can also be offered to control chronic cough
Nonsteroidal anti-inflammatory drugs (NSAIDs) – Treatment of constitutional symptoms of acute bronchitis, including mild-to-moderate pain
Antitussives/expectorants (eg, guaifenesin) – Treatment of cough, dyspnea, and wheezing
Mucolytics – Management of moderate-to-severe COPD, especially in winter
Among otherwise healthy individuals, antibiotics have not demonstrated any consistent benefit in acute bronchitis. The following recommendations have been made with respect to treatment of acute bronchitis with antibiotics:

Acute bronchitis should not be treated with antibiotics unless comorbid conditions pose a risk of serious complications
Antibiotic therapy is recommended in elderly (>65 years) patients with acute cough if they have had a hospitalization in the past year, have diabetes mellitus or congestive heart failure, or are receiving steroids
Antibiotic therapy is recommended in patients with acute exacerbations of chronic bronchitis
In stable patients with chronic bronchitis, long-term prophylactic therapy with antibiotics is not indicated.

Influenza vaccination may reduce the incidence of upper respiratory tract infections and, subsequently, reduce the incidence of acute bacterial bronchitis. It may be less effective in preventing illness than in preventing serious complications and death.

I hope it helps. Seek a pulmonologist for further management,

Take good care of yourself and dont forget to close the discussion please.

May the odds be ever in your favour.
Regards
Khan

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