Acetaminophen injection

Generic name: Acetaminophen (injection)
Dosage form: intravenous solution (10 mg/mL)
Drug class: Miscellaneous analgesics

Usage of Acetaminophen injection

Acetaminophen injection is used to treat pain in adults and children at least 2 years old. For moderate to severe pain, acetaminophen is sometimes given with opioid pain medicine.

Acetaminophen injection may also be used for purposes not listed in this medication guide.

Acetaminophen injection side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

In rare cases, acetaminophen may cause a severe skin reaction that can be fatal, even if you took acetaminophen in the past and had no reaction. Tell your caregivers or call your doctor if you have skin redness or a rash that spreads and causes blistering and peeling.

Acetaminophen may cause serious side effects. Stop using acetaminophen and call your doctor at once if you have:

  • fever, cough, chest pain, trouble breathing; or
  • liver problems--nausea, upper stomach pain, itching, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes).

    • Common side effects of acetaminophen may include:

  • cough, breathing problems;
  • nausea, vomiting;
  • constipation;
  • agitation;
  • itching;
  • headache; or
  • sleep problems (insomnia).

    • This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

    Before taking Acetaminophen injection

    You should not be treated with acetaminophen if you are allergic to it or if you have severe liver disease.

    Tell your doctor if you have ever had:

  • bleeding problems;
  • liver disease, cirrhosis, alcoholism, or more than 3 alcoholic beverages per day;
  • kidney disease; or
  • if you've recently been sick with vomiting or diarrhea;
  • if you are malnourished.

    • Tell your doctor if you are pregnant or breastfeeding.

    Pregnancy may be less likely to occur while the mother or the father is using acetaminophen.

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    How to use Acetaminophen injection

    Acetaminophen is injected into a vein by a healthcare provider, usually once every 4 to 6 hours.

    Doses are based on weight in people who weigh under 110 pounds (50 kilograms). If you use this medicine long term, your dose may change if you gain or lose weight.

    Warnings

    Call your doctor at once if you have nausea, vomiting, upper stomach pain, and yellowing of your skin or eyes.

    In rare cases, acetaminophen may cause a severe skin reaction that can be fatal. Call your doctor right away if you have skin redness or a rash that spreads and causes blistering and peeling.

    What other drugs will affect Acetaminophen injection

    Tell your doctor if you also use a blood thinner (warfarin, Coumadin, Jantoven)

    Other drugs may affect acetaminophen, including prescription and over-the-counter medicines, vitamins, and herbal products. Tell your doctor about all your current medicines and any medicine you start or stop using.

    Popular FAQ

    Paracetamol is known as acetaminophen in the U.S. Acetaminophen relieves mild-to-moderate pain, headache and fever. It's available over-the-counter as brand names such as Tylenol, Mapap or Panadol, and also as generics and store-specific brands. There are no differences in the chemical or therapeutics uses of acetaminophen and paracetamol, although recommended doses or available products may differ between countries. Continue reading

    Acetaminophen is only effective at relieving pain and fever, while ibuprofen relieves inflammation in addition to pain and fever. Continue reading

    Yes, it is safe for most people to take tramadol with acetaminophen, ibuprofen, or aspirin if they are old enough (aspirin is not recommended for children less than 16 years and tramadol should not be taken by children under the age of 12). Continue reading

    Mucinex products do not help to prevent or treat the COVID-19 virus itself, but might help relieve some of the symptoms of COVID, like chest congestion, cough, or headache. Select a product that targets only the symptoms you have. Continue reading

    Yes, it is safe to take ibuprofen (Advil) and acetaminophen (Tylenol) together if you need to for extra pain relief, such as for a dental extraction. Taking ibuprofen and acetaminophen together works better to relieve pain than taking ibuprofen and acetaminophen separately. This is because they work in different ways with few side effects. Continue reading

    Percocet is a combination of acetaminophen and immediate-release oxycodone taken as a tablet for pain. In general, oxycodone (an opioid) stays in the urine for 4 days, saliva for 2 days, and hair for up to 90 days. It can take about 1 day to get a dose of Percocet out of your bloodstream, but it still may be detectable on a drug test. Continue reading

    A fever is defined as a body temperature of 38°C (100.4°F) or higher. Normal body temperature is usually 37°C (98.6°F), although it can be about a half degree Celsius higher or lower for some people and that’s normal for them. Continue reading

    Yes, it is safe for most people to take tramadol with acetaminophen, ibuprofen, or aspirin if they are old enough (aspirin is not recommended for children less than 16 years and tramadol should not be taken by children under the age of 12). Continue reading

    Paracetamol is known as acetaminophen in the U.S. Acetaminophen relieves mild-to-moderate pain, headache and fever. It's available over-the-counter as brand names such as Tylenol, Mapap or Panadol, and also as generics and store-specific brands. There are no differences in the chemical or therapeutics uses of acetaminophen and paracetamol, although recommended doses or available products may differ between countries. Continue reading

    Acetaminophen is only effective at relieving pain and fever, while ibuprofen relieves inflammation in addition to pain and fever. Continue reading

    Mucinex products do not help to prevent or treat the COVID-19 virus itself, but might help relieve some of the symptoms of COVID, like chest congestion, cough, or headache. Select a product that targets only the symptoms you have. Continue reading

    Yes, it is safe to take ibuprofen (Advil) and acetaminophen (Tylenol) together if you need to for extra pain relief, such as for a dental extraction. Taking ibuprofen and acetaminophen together works better to relieve pain than taking ibuprofen and acetaminophen separately. This is because they work in different ways with few side effects. Continue reading

    Percocet is a combination of acetaminophen and immediate-release oxycodone taken as a tablet for pain. In general, oxycodone (an opioid) stays in the urine for 4 days, saliva for 2 days, and hair for up to 90 days. It can take about 1 day to get a dose of Percocet out of your bloodstream, but it still may be detectable on a drug test. Continue reading

    A fever is defined as a body temperature of 38°C (100.4°F) or higher. Normal body temperature is usually 37°C (98.6°F), although it can be about a half degree Celsius higher or lower for some people and that’s normal for them. Continue reading

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