Acetylcysteine is a drug that breaks down mucus, the substance that lubricates many parts of the body such as the mouth, throat, and lungs.

Acetylcysteine inhalation is used to thin the mucus in people with certain lung conditions such as cystic fibrosis, emphysema, bronchitis, pneumonia, or tuberculosis. Acetylcysteine inhalation is also used during surgery or anesthesia, and to prepare the throat or lungs for a medical test.

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  • Mucomyst-10
  • Less common:
    Wheezing, tightness in chest, or difficulty in breathing (especially in asthma patients)
    Rare:
    Skin rash or other irritation
    Less common:
    Clammy skin
    fever
    increase in amount of mucus in lungs
    irritation or soreness of mouth, throat, or lungs
    nausea or vomiting
    runny nose
  • MUCOMYST is available in rubber stoppered glass vials containing 4, 10, or 30 mL. The 20% solution may be diluted to a lesser concentration with either Sodium Chloride for Injection, Sodium Chloride for Inhalation, Sterile Water for Injection, or Sterile Water for Inhalation. The 10% solution may be used undiluted. MUCOMYST does not contain an antimicrobial agent, and care must be taken to minimize contamination of the sterile solution. If only a portion of the solution in a vial is used, store the remainder in a refrigerator and use for inhalation only within 96 hours. NEBULIZATION—FACE MASK, MOUTH PIECE, TRACHEOSTOMY When nebulized into a face mask, mouth piece, or tracheostomy, 1 to 10 mL of the 20% solution or 2 to 20 mL of the 10% solution may be given every 2 to 6 hours; the recommended dose for most patients is 3 to 5 mL of the 20% solution or 6 to 10 mL of the 10% solution 3 to 4 times a day. NEBULIZATION TENT, CROUPETTE In special circumstances it may be necessary to nebulize into a tent or Croupette, and this method of use must be individualized to take into account the available equipment and the patient's particular needs. This form of administration requires very large volumes of the solution, occasionally as much as 300 mL during a single treatment period. If a tent or Croupette must be used, the recommended dose is the volume of MUCOMYST (using 10% or 20%) that will maintain a very heavy mist in the tent or Croupette for the desired period. Administration for intermittent or continuous prolonged periods, including overnight, may be desirable. DIRECT INSTILLATION When used by direct instillation, 1 to 2 mL of a 10% to 20% solution may be given as often as every hour. When used for the routine nursing care of patients with tracheostomy, 1 to 2 mL of a 10% to 20% solution may be given every 1 to 4 hours by instillation into the tracheostomy. MUCOMYST may be introduced directly into a particular segment of the bronchopulmonary tree by inserting (under local anesthesia and direct vision) a small plastic catheter into the trachea. Two to 5 mL of the 20% solution may then be instilled by means of a syringe connected to the catheter. MUCOMYST may also be given through a percutaneous intratracheal catheter. One to 2 mL of the 20% or 2 to 4 mL of the 10% solution every 1 to 4 hours may then be given by a syringe attached to the catheter. DIAGNOSTIC BRONCHOGRAMS For diagnostic bronchial studies, two to three administrations of 1 to 2 mL of the 20% solution or 2 to 4 mL of the 10% solution should be given by nebulization or by instillation intratracheally, prior to the procedure.