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Acetylcysteine is a medication that is primarily used to loosen or thin obstructive mucus that may be impeding proper lung function due to asthmatic bronchitis, bronchitis, chronic emphysema, cystic fibrosis, and pneumonia. Acting as a mucolytic, acetylcysteine can often significantly reduce the viscosity of secretions which in turn allows for productive coughing to remove mucus and ease air flow.

How to Use Acetylcysteine

Acetylcysteine can be taken by mouth, inhaled as a mist using a nebulizer, or taken intravenously. Discuss with your physician or attending pharmacist at Fusion Rx Compounding Pharmacy about which method of usage may be the best for you. If you miss a dose, administer it as soon as possible, but if it is time for your next dose, take only one dose; never 'double dose.'

Potential Side Effects

  • Inflammation of the Tongue or Mouth
  • Cold or Clammy Skin
  • Fever
  • Nausea
  • Drowsiness
  • Redness and/or Itchy Skin
  • Runny Nose
  • Vomiting

Warning: If your physician clears you for usage of acetylcysteine, pay careful attention to any reactions to the medication such as: difficulty breathing, tightness in the chest, or swelling of the mouth, tongue, face, or lips. If any of the above is experienced seek medical treatment immediately.

Warning: Anaphylaxis (severe allergic reaction) may possibly occur so consultation with your physician before taking is of utmost importance. Anaphylaxis is a potentially life-threatening complication and if experienced, 911 emergency should be called immediately.


As many medical conditions may negatively interact with the usage of acetylcysteine, everyone should consult with their physician before using the medication. Anyone pregnant, breast feeding, or planning a pregnancy, taking any prescription or non-prescription drugs, or who is allergic to medications, foods, or other should inform their physician during the consultation prior to taking this medication.

  • "It is rare to find health professionals who are so willing to educate the patient on what they need to know."

    Clair C. | West Hollywood, CA