Safety and Efficacy Study of a New Formulation of Acetylcysteine Injection

Inclusion Criteria: 1\) Any subject requiring treatment with acetylcysteine for acute acetaminophen toxicity Exclusion Criteria: 1. History of allergy or hypersensitivity to acetylcysteine or any component of Acetadote. 2. Exposed to investigational drugs within 30 days before Clinical Trial Material (CTM) administration. 3. Pregnant or nursing. 4. Less than 12 years of age. 5. Have a baseline alanine aminotransferase (ALT) or aspartate aminotransferase (AST) \>1000 U/L. 6. Have a baseline International Normalized. Ratio (INR) \> 2.0 7. Be on dialysis or having existing renal injury such that the volume of the study drug administration would render the patient unsuitable for the study, in the opinion of the investigator. 8. Have congestive heart failure such that the volume of the study drug administration would render the patient unsuitable for the study, in the opinion of the investigator. 9. Inability to understand the requirements of the study. Subjects must be willing to provide written informed consent or consent of parent/legal guardian (as evidenced by signature on an informed consent document approved by an Institutional Review Board \[IRB\]), and agree to abide by the study restrictions. (If the subject is incapacitated, informed consent will be sought from a legally acceptable representative). 10. Refusal to provide written authorization for use and disclosure of protected health information. 11. Be otherwise unsuitable for the study, in the opinion of the Investigator.