What are some side effects of Flovent inhalers?

Side effects of Flovent inhalers include white patches or sores within the mouth or lips, fever, headaches, nausea, vomiting and sore throat, according to Drugs.com. Rarer, more severe side effects include feelings of weakness, shortness of breath, blurred vision and liver problems.

Patients allergic to fluticasone or milk proteins are advised not to use Flovent, and the inhaler should never be used to treat asthma attacks that have already begun, warns Drugs.com. Patients must inform their doctor of previous medical conditions prior to use, especially bacterial, viral or fungal infections; tuberculosis; eye infection; liver disease; or a weakened immune system, advises WebMD.