Trelegy Ellipta contains lactose, which is a type of sugar in milk. Lactose is an inactive ingredient in Trelegy Ellipta that helps the medication reach your lungs. (An active ingredient is the part of the medication that makes it work. An inactive ingredient is any part of the medication that’s not the active ingredient.)
So if you have a milk allergy, you may have an allergic reaction to the lactose in Trelegy Ellipta. These allergic reactions can be serious. There have been reports of severe allergic reactions occurring in people with milk protein allergies who took other powder medications with lactose in them.
If you have a milk allergy, talk with your doctor about safe treatments for your condition.