Like steroid inhalers, combined inhalers can cause side effects that are usually mild and easily avoided. Dry mouth, hoarseness, sore throat and oral thrush are possible side effects of using Fostair, but if you rinse your mouth after each use you shouldn’t get any of these. A volumatic spacer can also help you avoid them.
If you experience any of the rarer side effects, such as skin rash or wheezing, it could mean you’re allergic to an ingredient in the inhaler. In this case, stop using it immediately and seek immediate medical attention.