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Medications and Drugs

Brand Names: Mucomyst-10

Generic Name: acetylcysteine (inhalation) (Pronunciation: a SEET il SIS teen)

What is acetylcysteine (Mucomyst-10)?

Acetylcysteine is a mucolytic (myoo-koe-LIT-ik) drug that breaks down mucus, the substance that lubricates many parts of the body such as the mouth, throat, and lungs.

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

Acetylcysteine may also be used for purposes other than those listed in this medication guide.

What are the possible side effects of acetylcysteine (Mucomyst-10)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Stop using acetylcysteine and call your doctor at once if you have chest tightness or trouble breathing.

Less serious side effects of acetylcysteine include:

  • unusual or unpleasant smell while using the medication;
  • sticky feeling around the nebulizer mask;
  • white patches or sores inside your mouth or on your lips;
  • nausea, vomiting;
  • fever;
  • runny nose, sore throat;
  • drowsiness; or
  • skin rash or clammy feeling.

Side effects other than those listed here may also occur. Talk to your doctor about any side effect that seems unusual or that is especially bothersome. You may report side effects to FDA at 1-800-FDA-1088.

What is the most important information I should know about acetylcysteine (Mucomyst-10)?

Do not use acetylcysteine at home if you do not fully understand all instructions that are specific to your use of this medication. Use only the inhaler device provided with your medicine or you may not get the correct dose.

Acetylcysteine solution can be inhaled directly from the nebulizer, or with a face mask, mouth piece, tent, or intermittent positive pressure breathing (IPPB) machine.

Do not mix your dose of acetylcysteine until you are ready to use the medication. Diluted acetylcysteine must be used within 1 hour of mixing.

Acetylcysteine liquid may change color once you have opened the bottle. This is caused by a chemical reaction and will not affect the medicine.

You may sense an unusual or unpleasant smell while using acetylcysteine.

Other side effects may include sticky feeling around the nebulizer mask, white patches or sores inside your mouth or on your lips, nausea, fever, runny nose, sore throat, drowsiness, skin rash, or clammy skin.

There may be other drugs that can affect acetylcysteine, or that should not be used in the same nebulizer. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Report Problems to the Food and Drug Administration

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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