Drug-Induced Liver Injury

Liver damage caused by a medication or supplement

Table of Contents

Quick Facts

  • Type: Liver condition
  • Common triggers: Certain medicines, supplements, herbs
  • Key sign: Jaundice, dark urine, fatigue
  • Seek urgent care: Yellowing skin, confusion, severe symptoms

Overview

Drug-induced liver injury (DILI) is damage to the liver caused by a medication, dietary supplement, or herbal product. The liver processes most substances that enter the body, so it is especially vulnerable to harmful effects. The injury can range from mild, temporary changes seen only on blood tests to severe inflammation and, rarely, life-threatening liver failure.

Some drugs cause liver injury in a predictable, dose-related way, such as taking too much acetaminophen (paracetamol). Others cause injury unpredictably in a small number of people regardless of dose. Most liver injury improves once the responsible product is stopped, which makes recognizing it early very important. A particular challenge with DILI is that its symptoms can look like many other liver problems, and the responsible product is not always obvious, especially when someone takes several medicines or uses supplements they may not think to mention. This is why a thorough review of everything a person is taking is such a central part of working out the cause.

Symptoms

Mild cases may cause no symptoms and be found only on blood tests. When symptoms occur, they reflect liver inflammation.

  • Fatigue and a general feeling of being unwell
  • Nausea, loss of appetite, or vomiting
  • Pain or discomfort in the upper right abdomen
  • Yellowing of the skin and eyes (jaundice)
  • Dark urine and pale stools
  • Itching of the skin

Jaundice, confusion or drowsiness, easy bruising or bleeding, or severe vomiting can signal serious liver injury and need urgent medical care. A suspected acetaminophen overdose is an emergency that needs immediate treatment.

Causes

Many substances can injure the liver. Common categories include:

  • Pain and fever medicines: Acetaminophen (paracetamol) in high or overdose amounts is a well-known cause.
  • Certain antibiotics and antifungals: Some can affect the liver in susceptible people.
  • Other prescription drugs: Including some used for seizures, tuberculosis, cholesterol, and certain other conditions.
  • Supplements and herbal products: Some "natural" products and bodybuilding or weight-loss supplements can harm the liver.
  • Combinations and alcohol: Mixing certain medicines, or taking them with heavy alcohol use, raises the risk.

Risk Factors

  • Taking high doses or combining multiple medicines
  • Heavy alcohol use
  • Existing liver disease
  • Older age
  • Use of certain supplements or herbal products
  • Individual sensitivity, which can be unpredictable

Diagnosis

There is no single test for DILI, so doctors piece together the diagnosis from history and tests after ruling out other causes.

  • Medication and supplement history: A careful review of all prescription drugs, over-the-counter medicines, supplements, and herbs, including timing.
  • Liver blood tests: To measure liver enzymes and how well the liver is working.
  • Other tests: Imaging and blood tests to exclude other causes such as viral hepatitis, gallstones, or alcohol-related disease.
  • Improvement after stopping: Liver tests often improve once the responsible product is stopped, which supports the diagnosis.

Treatment

The most important step is stopping the substance causing the injury. Most people then recover.

  • Stopping the drug or supplement: Under medical guidance, the responsible product is discontinued.
  • Specific antidotes: For acetaminophen overdose, a medicine called N-acetylcysteine can protect the liver and is most effective when given early.
  • Supportive care: Rest, fluids, and treatment of symptoms such as nausea and itching.
  • Monitoring: Repeat liver blood tests to confirm recovery.
  • Specialist and hospital care: Severe injury or liver failure is treated in the hospital, and rare cases of liver failure may need evaluation for a liver transplant.

Prevention

  • Take medicines exactly as directed and do not exceed the recommended dose, especially acetaminophen
  • Check that combination products do not contain hidden acetaminophen
  • Limit alcohol, particularly when taking medicines that affect the liver
  • Tell your doctor and pharmacist about all supplements and herbal products you take
  • Have liver blood tests if recommended while on certain medications, and report symptoms early

When to See a Doctor

Contact a doctor if you develop fatigue, nausea, upper-right abdominal pain, or itching after starting a new medicine or supplement. Seek emergency care immediately if you have:

  • Yellowing of the skin or eyes (jaundice)
  • Confusion, drowsiness, or difficulty staying awake
  • Easy bruising or bleeding
  • Severe vomiting or inability to keep fluids down
  • A known or suspected overdose of acetaminophen or any medicine

For a suspected overdose, seek emergency help right away, as early treatment can prevent serious liver damage.

Related Topics

Drug Allergy

Another adverse reaction to medications.

 Hepatitis

Liver inflammation that can mimic DILI.

 Cirrhosis

Severe, long-term liver damage to distinguish from DILI.

 Jaundice

A key warning sign of liver injury.

Frequently Asked Questions

What is drug-induced liver injury?

It is damage to the liver caused by a medication, supplement, or herbal product. It can range from mild changes seen only on blood tests to serious liver failure. Most cases improve once the responsible product is stopped.

Which medicines most commonly cause liver injury?

Acetaminophen (paracetamol) in high or overdose amounts is a well-known cause. Some antibiotics, antifungals, seizure and tuberculosis medicines, and certain supplements and herbal products can also injure the liver, sometimes unpredictably.

Can supplements and herbal products harm the liver?

Yes. "Natural" does not mean harmless. Some herbal products and bodybuilding or weight-loss supplements have caused liver injury. Always tell your doctor and pharmacist about every supplement you take so risks can be considered.

When is drug-induced liver injury an emergency?

Seek emergency care for yellowing of the skin or eyes, confusion or drowsiness, easy bruising or bleeding, or a known or suspected medicine overdose. A suspected acetaminophen overdose needs immediate treatment, which is most effective when given early.

Does the liver recover after drug-induced injury?

In most cases, yes. Once the responsible drug or supplement is stopped, liver blood tests usually improve and the liver recovers. Severe injury is less common but can be serious, which is why early recognition and stopping the cause matter.

Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider with any questions about a medical condition.

References

  1. National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK). LiverTox: Drug-Induced Liver Injury.
  2. Mayo Clinic. Toxic hepatitis.
  3. MedlinePlus, U.S. National Library of Medicine. Drug-induced liver injury.
  4. American College of Gastroenterology. Idiosyncratic drug-induced liver injury.