Acetylcysteine Injection (NAC IV)

Acetylcysteine is used to treat many conditions. Some of these conditions include flu, dry eye, cough and other lung conditions, kidney disease, and Tylenol overdose.

Dosage Strength

  • Dosage: Dosages depend on the patient’s condition.
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N-acetyl-cysteine (NAC) is a substance derived from the amino acid L-cysteine, which is crucial for our health. It plays a vital role in the body’s antioxidant defense system by replenishing an important antioxidant called glutathione. Glutathione helps protect our cells and tissues from damage caused by harmful free radicals. NAC acts as a hepatoprotective agent by restoring hepatic glutathione levels, acting as a substitute for this essential antioxidant. Cysteine, the precursor of NAC, can be found in protein-rich foods like chicken, turkey, yogurt, cheese, eggs, and legumes. NAC is the supplement form of cysteine and is used to support various health conditions.

Uses for Acetylcysteine

Acetylcysteine has a wide range of uses beyond its antioxidant properties. It is employed in the treatment of conditions such as the flu, dry eye and kidney disease. Additionally, it has been explored for its potential benefits in other areas:

Infertility: NAC has been studied for its potential role in supporting fertility.

Psychiatric Diseases: NAC has shown promise in research related to psychiatric disorders, including depression, bipolar disorder, schizophrenia, and obsessive-compulsive disorder. Further studies are underway to explore its potential benefits in these areas.

Respiratory Conditions: Due to its antioxidant and expectorant properties, NAC is used to treat cough and various lung conditions. It helps loosen mucus in the airways and reduces inflammation in the bronchial tubes and lung tissue.

Tylenol® Overdose: In emergency rooms, NAC is used to treat acetaminophen (Tylenol®) overdose. It helps protect the liver and prevent liver damage caused by the overdose.

Neurotransmitter Regulation: NAC assists in the regulation of glutamate, a neurotransmitter responsible for transmitting signals between the brain and nerves. This property makes it potentially beneficial in conditions involving addiction, withdrawal symptoms, and relapse prevention.

Dosage, Concentration, Route of Administration

Dosage: Seek advice from a licensed physician, medical director, or other healthcare provider

Concentration: 200mg/ml

Route of Administration: For IV Injection only

Precautions/Side Effects

N-acetyl cysteine is generally safe for most adults. Always speak with your doctor when taking any new medication to discuss the possibilities. Women who are pregnant or breastfeeding are also typically safe when taking NAC, but should always speak with their healthcare provider before taking. Some drugs may interact with N-acetyl cysteine. One major interaction is with nitroglycerin. Nitroglycerin dilates the blood vessels and increases blood flow. NAC tends to increase the effects of nitroglycerin, possibly causing increased side effects, such as headache, dizziness, and lightheadedness. Another drug that moderately interacts with NAC is activated charcoal.

Some common side effects include:

  • – By mouth: nausea, vomiting, diarrhea, or constipation
  • – Intravenously (IV): rash, fever, headache, drowsiness, low blood pressure, and liver problems
  • – By inhalation: swelling in the mouth, runny nose, drowsiness, clamminess, and chest tightness


Store at controlled room temperature. Protect from light.


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