The most common side effects of this inhaler are wheezing or mild cough. These effects can be minimized with the use of a bronchodilator inhaler before using the budesonide inhaler. A fungal infection of the throat known as thrush may be experienced by some people who use the budesonide inhaler without the spacer device. The risk of this infection is higher in adults than in children. In some cases, sore throat or hoarseness may be experienced. To reduce the risk of such problems, rinse your mouth with water and use a spacer device after each use. A less common side effect is an alteration in voice in some cases. Hypersensitivity reactions that can result due to inhaled budesonide are: Rash, Dermatitis, Contact, Anaphylaxis, Angioedema, Bronchospasm and, Itching Discontinue use if you experience any of these reactions.