Drug-Induced Liver Injury

Drug-induced liver injury (DILI) is damage to the liver caused by a medicine, herbal remedy or dietary supplement. It can look like almost any liver disease. Some people have only abnormal blood tests, others become yellow (jaundiced), and a few develop severe liver failure. There are two main patterns. Some drugs are "predictable": harm happens if too much is taken, as with paracetamol (acetaminophen). Others are "unpredictable": rarely, and not clearly dose-related, a drug harms the liver of a susceptible person, often within the first weeks to months of use.

DILI is uncommon for any single medicine but is an important cause of liver injury overall, and one of the main reasons that medicines are withdrawn from the market. Herbal and dietary supplements account for a growing share of cases worldwide, including in the Gulf region. Exact numbers for Saudi Arabia are not well established.

The liver breaks down almost everything we swallow, and sometimes the breakdown products are harmful, or the immune system reacts against the liver. Risk is higher with several medicines at once, with older age, existing liver disease, heavy alcohol use, and certain genes. Medicines linked to liver injury include some antibiotics (for example amoxicillin-clavulanate), anti-tuberculosis drugs (such as isoniazid and rifampicin), some anti-epileptic drugs, some anti-inflammatory and pain medicines, and paracetamol when taken above the safe limit. Herbal mixtures, body-building and weight-loss supplements, high-dose turmeric (curcumin) concentrates and green tea extract capsules are well-known causes. "Natural" does not mean safe: products may be contaminated or contain hidden ingredients.

There is no single test. Diagnosis rests on a careful history of everything you have taken in the last months, including prescriptions, over-the-counter pills, herbs, teas, protein powders, injections and traditional remedies, plus the timing of when symptoms started. Blood tests show the pattern of injury (liver enzymes, bilirubin, clotting). Doctors rule out other causes: viral hepatitis (A, B, C, E), autoimmune hepatitis, gallstones and blocked bile ducts (by ultrasound or MRI), fatty liver and alcohol. A liver biopsy may be needed in unclear cases. Improvement after stopping the suspect product supports the diagnosis. Bring all packages and labels to your appointment.

Most people recover fully, usually within weeks to a few months after the cause is stopped. Some injuries take longer, and a small number lead to long-lasting liver damage. A small minority develop acute liver failure, a life-threatening condition in which the liver stops working quickly; this needs intensive care and sometimes a liver transplant. The earlier the product is stopped and a doctor is involved, the better the outlook.