Ambroxol

What it is

Ambroxol is a mucolytic and expectorant. It stimulates the airway glands and the movement of the cilia that sweep mucus upwards, and it supports surfactant production, so secretions become thinner and easier to bring up. Where it is marketed, it is used for a cough with thick phlegm during airway infections; the MHRA has licensed no ambroxol product in the UK.

A usual adult range, not a national label — the dose and the timing differ by country and by product.

Used for

• Cough

Approved uses differ by country — some of these may be off-label or unapproved where you live.

What to know while taking it

It is taken with food, spread across the day, and enough water matters as much as the drug itself — without fluid the loosened mucus stays where it is. Because it makes a cough more productive rather than quieter, it does not sit well with something meant to suppress coughing at the same time. Mild nausea, stomach discomfort or an altered sense of taste can occur and generally settle.

When to see a doctor

Rash, blistering or peeling skin, swelling of the face or mouth, or breathing that becomes harder are reasons to stop guessing and see a doctor; so is a cough that persists or comes with fever after the course its label sets, about two weeks on Italy's AIFA leaflet.

Worth knowing

• Drink enough water