Acetaminophen Injection

• Tell all of your health care providers that you take this medicine. This includes your doctors, nurses, pharmacists, and dentists.
• Do not take more than what your doctor told you to take. Taking more than you are told may raise your chance of very bad side effects.
• Avoid other sources of acetaminophen. Check labels closely. Too much acetaminophen may cause problems.
• Call your doctor right away if you take more than 4,000 mg (milligrams) of acetaminophen in a day, even if you feel well.
• Talk with your doctor before you drink alcohol.
• If you are taking warfarin, talk with your doctor. You may need to have your blood work checked more closely while you are taking it with acetaminophen injection.
• This medicine may affect certain lab tests. Tell all of your health care providers and lab workers that you take this medicine.
• Different brands of acetaminophen injection may have different doses for children. Talk with the doctor before giving this medicine to a child.
• Tell your doctor if you are pregnant or plan on getting pregnant. You will need to talk about the benefits and risks of using acetaminophen injection while you are pregnant.
• Tell your doctor if you are breast-feeding. You will need to talk about any risks to your baby.

WARNING/CAUTION: Even though it may be rare, some people may have very bad and sometimes deadly side effects when taking a drug. Tell your doctor or get medical help right away if you have any of the following signs or symptoms that may be related to a very bad side effect:

• Signs of an allergic reaction, like rash; hives; itching; red, swollen, blistered, or peeling skin with or without fever; wheezing; tightness in the chest or throat; trouble breathing or talking; unusual hoarseness; or swelling of the mouth, face, lips, tongue, or throat.
• Signs of liver problems like dark urine, feeling tired, not hungry, upset stomach or stomach pain, light-colored stools, throwing up, or yellow skin or eyes.
• Not able to pass urine or change in how much urine is passed.
• A very bad skin reaction (Stevens-Johnson syndrome/toxic epidermal necrolysis) may happen. It can cause very bad health problems that may not go away, and sometimes death. Get medical help right away if you have signs like red, swollen, blistered, or peeling skin (with or without fever); red or irritated eyes; or sores in your mouth, throat, nose, or eyes.

• If you need to store acetaminophen injection at home, talk with your doctor, nurse, or pharmacist about how to store it.