Allergy: If allergy is found, acetylcysteine has to be discontinued.
Elevated serum transaminases levels were temporally associated with acetylcysteine (the active ingredient contained in NAC) administration in a patient with cystic fibrosis.
Patient should not take acetylcysteine at the same time as antibiotics. Antibiotics can however, be taken at least 2 hrs after acetylcysteine.