Acetylcysteine for Injection 6 g/30 mL Single-Dose Vial 30 mL x 4/Pack by Almaject (RX)Almaject Acetylcysteine for Injection is a medication used to treat acetaminophen (Tylenol) overdose and other conditions that involve excess levels of acetaminophen in the body. It is also used to help thin and loosen mucus in people with certain lung diseases such as cystic fibrosis or chronic bronchitis. It works by replenishing levels of a natural substance called glutathione, which helps protect the body from the damaging effects of acetaminophen