Your doctor will tell you how much of this medicine to take and how often. Do not take more medicine or take it more often than your doctor tells you to. It is not safe to use more than 4 grams (4,000 milligrams) of acetaminophen in one day (24 hours).
If this medicine upsets your stomach, you may take it with food or milk.
Measure the oral liquid with a marked measuring spoon or medicine cup.
Drink plenty of fluids to help avoid constipation.
If a dose is missed:
If you are taking this medicine on a regular schedule and you miss a dose or forget to take your medicine, take it as soon as you can. If it is almost time for your next dose, wait until then to take the medicine and skip the missed dose.
Do not use extra medicine to make up for a missed dose.
Store the medicine at room temperature in a closed container, away from heat, moisture, and direct light. Do not freeze. Ask your pharmacist, doctor, or health caregiver about the best way to dispose of any leftover medicine after you have finished your treatment. You will also need to throw away old medicine after the expiration date has passed.
Keep all medicine away from children and never share your medicine with anyone.
Ask your doctor or pharmacist before using any other medicine, including over-the-counter medicines, vitamins, and herbal products.
Make sure your doctor knows if you are using an MAO inhibitor (Eldepryl®, Marplan®, Nardil®, Parnate®), medicine for depression (such as amitriptyline, imipramine, Norpramin®, Vivactil®), or any medicines that make you sleepy (such as sleeping pills, cold and allergy medicine, other narcotic pain relievers, or sedatives).
Do not drink alcohol while you are using this medicine. Acetaminophen can damage your liver and drinking alcohol can increase this risk. If you regularly drink 3 or more alcoholic drinks every day, do not take acetaminophen without asking your doctor.
Many combination medicines contain acetaminophen, including products with brand names such as Alka-Seltzer Plus®, Comtrex®, Drixoral®, Excedrin Migraine®, Midol®, Sinutab®, Sudafed®, Theraflu®, and Vanquish®. Carefully check the labels of all other medicines you are using to be sure they do not contain acetaminophen.
Make sure your doctor knows if you are pregnant or breastfeeding, or if you have lung disease, liver disease, kidney disease, problems with urination, underactive thyroid, Addison's disease, prostate problems, a stomach disorder, or a history of head injury or brain tumor.
This medicine may be habit-forming. If you feel that the medicine is not working as well, do not take more than your prescribed dose. Call your doctor for instructions.
Make sure any doctor or dentist who treats you knows that you are using this medicine. Acetaminophen may affect the results of certain laboratory tests.
This medicine may make you dizzy or drowsy. Avoid driving, using machines, or doing anything else that could be dangerous if you are not alert.
This medicine may cause constipation. This is more common if you use it for a long time. Ask your doctor if you should also use a laxative to prevent and treat constipation.