If you notice any of these side effects, stop using the spray for more than seven consecutive days. Decongestant nasal sprays and drops should not be used for more than a week at a time because using them for too long can make your stuffiness worse. Decongestant medicines do not usually have side effects, and any side effects you may experience are usually mild. Decongestants that come as tablets, liquids or powders that you swallow are not recommended if you're breastfeeding.

It's also important to be careful when taking other medicines if you're using an "all-in-1" decongestant remedy. Most decongestants can be bought over the counter from pharmacies without a prescription. Who can take decongestants

Some products may just contain decongestant medicine, but many are sold as "all-in-1" remedies that contain decongestants, painkillers or antihistamines.

Examples include pseudoephedrine (sometimes called by the brand name Sudafed). Types of decongestants For example, taking decongestants alongside some antidepressants can cause a dangerous rise in blood pressure.

Serious side effects

The patient information leaflet that comes with your medicine will say who should not use it and who should get advice before using it. How to use decongestants Children aged 6 to 11 should take them for no longer than 5 days. Ask a pharmacist for advice about this. They work by reducing the swelling of the blood vessels in your nose, which helps to open the airways.