Side effects center Lareb has received multiple complaints in recent months regarding people coughing after using a new model of inhaler made by manufacturer Viatris. There were almost 150 complaints by December, and the number of registered complaints has since risen to 446.Users also suffered more from their synptoms after using the prescribed inhalers. “Some patients even struggled with their lung function worsening,” Lareb said. It is unknown what is causing the complaints. Read this story