What is expectorant and drug classification

What is expectorant and drug classification :- It means to drive from chest. Expectorant a drug which includes respiratory tract secretions so as to find them and decrease their viscosity and thus help in their expulsion.


  1. Direct Acting

2. Reflect acting

3. Mucolytics

Direct acting

These are volatile oils like eucalyptus oil lemon oil and anise oil. These oils can be administrated orally or by inhalation with steam. The increased respiratory secretions by a direct action

Sodium and potassium citrate or Acetate. Dose : 0.3-1 gm

These are believed to increase bronchial secretion by salt action.

  • potassium iodine

The use of potassium iodine may lead to unpleasant hypersecretion in the eyes, nose and mouth sneezing, conjunctival irritation, parotid swelling, thyroid enlargement and brassy taste may be troublesome. The usual dosage is 0.3g as plain or enteric coated tablets 3-4 times daily.

Reflect acting

These are emetics which is sub-emetic doses act as expectorants

  • Ammonium salts (0.3-1g) are gastric irritants reflexly enhance bronchial secretion and sweating.

Mucolytic agent

These drugs make sputum les vicous so more easily cleared.

  • Bromhexine :- dose 8-16mg thrice a day orally
  • Carbocysteine :- dose 10-15 ml thrice a day as 5%w/V syrup. ( expectorant and drug classification)