Persistent cough issues? Looking for a good expectorant that has no side effects or allergies? Suffering from Bronchitis, Smoker’s Cough, Asthmatic / Acute Bronchitis, or Emphysema (breathlessness)? Try out the new and improved Cfizz NAC that provides dual benefits of NAC (N-acetyl cysteine) and Vitamin C. The better NAC for reliable respiratory support and better lung function. New improved formulation for enhanced experience. Now no more disturbed sleep nor affected daily routine.