Do cough medicines work?

What the evidence says

Most cough and cold medicines you buy without a prescription do not work well for kids. Scientists looked at many studies where children either got real cough medicine or a fake pill (placebo), and the real medicine did not clearly help more than the fake one.

This includes common ingredients like dextromethorphan (a cough suppressant), antihistamines, and decongestants. A large review of trials found there was not enough good proof that these ingredients help children cough less or feel better.

Codeine, sometimes used for cough in the past, has also been shown to work no better than a placebo, and it carries risks like slowed breathing. Honey has been studied too, and while some small trials hint it might soothe a cough a little, the evidence is not strong enough to be sure.

In Canada, this matters even more because Health Canada has ruled that non-prescription cough and cold medicines should never be given to children under 6 years old. This is stricter than just saying they might not work. It followed reports of serious harm, including overdoses, when these medicines were used in young kids.

The good news is a cough is often the body's way of clearing mucus, and it usually gets better on its own. Things like fluids, rest, and humidified air are safer ways to help a child feel more comfortable while their body fights off a cold.