Mild toxic hepatitis might not cause symptoms. It might be found with blood tests. When symptoms of toxic hepatitis occur, they can include:

• Yellowing of the skin, which may be easier to see on white skin. Yellowing of the whites of the eyes. This yellowing is called jaundice.
• Itching.
• Pain in the upper right part of the stomach area.
• Fatigue.
• Loss of appetite.
• Nausea and vomiting.
• Rash.
• Fever.
• Weight loss.
• Dark or tea-colored urine.

When to see a doctor

See a healthcare professional right away if you have symptoms that worry you.

Taking too much of some medicines, such as acetaminophen (Tylenol, others), may lead to liver failure. Get medical care right away for an adult or a child who has taken too much acetaminophen. Symptoms of a possible acetaminophen overdose include:

• Loss of appetite.
• Nausea and vomiting.
• Pain in the upper stomach area.
• Coma.

If you suspect an acetaminophen overdose, immediately call 911 or your local emergency services. In the United States, call a poison control center at 800-222-1222. Do not wait to see symptoms. An acetaminophen overdose can be fatal. But it can be treated soon after the acetaminophen is taken.

Toxic hepatitis happens when a substance causes swelling, called inflammation, in the liver.

Most of the time, the liver removes and breaks down most chemicals from the bloodstream. Breaking down toxins makes byproducts that can damage the liver. The liver has a great ability to heal itself. But constant contact with toxic substances can cause serious harm. Sometimes the harm can't be fixed.

Causes of toxic hepatitis include:

• Alcohol. Heavy drinking over many years can lead to alcoholic hepatitis. Not all heavy drinkers get alcoholic hepatitis. And some people who drink much less can get the disease. This can lead to liver failure.
• Pain relievers available without a prescription. Pain relievers such as acetaminophen, aspirin, ibuprofen (Advil, Motrin IB, others) and naproxen sodium (Aleve) can damage the liver. Taking them often or with alcohol can cause more damage.
• Prescription medicines. Some medicines linked to liver injury include statin medicines used to treat high cholesterol, the combined medicine amoxicillin-clavulanate (Augmentin), phenytoin (Dilantin, Phenytek), azathioprine (Azasan, Imuran), niacin (Niacor), ketoconazole, certain antivirals and anabolic steroids. There are many others.
• Herbs and supplements. Herbs that can harm the liver include aloe vera, black cohosh, cascara, chaparral, comfrey, kava and ephedra. There are many others. Children can get liver damage if they take large doses of vitamins thinking they're candy.
• Chemicals on the job. Common chemicals that can cause liver damage include the dry cleaning solvent carbon tetrachloride, a substance called vinyl chloride that's used to make plastics, the herbicide paraquat and a group of industrial chemicals called polychlorinated biphenyls.

Factors that might increase the risk of toxic hepatitis include:

• Having liver disease. People with a serious liver condition such as cirrhosis or metabolic dysfunction-associated steatotic liver disease are more likely to react to toxins.
• Having hepatitis. Infection with a hepatitis virus makes the liver more likely to be affected by toxins. Infections include hepatitis B, hepatitis C and infections caused by less common hepatitis viruses.
• Aging. With age, the liver breaks down harmful substances more slowly. So toxins stay in the body longer.
• Sex. Women seem to process, also called metabolize, certain toxins more slowly than men do. So their livers are in contact with higher amounts of harmful substances longer. This increases the risk of toxic hepatitis.
• Having certain gene changes, also called mutations. Inheriting certain gene changes that affect the liver enzymes that break down toxins might increase the risk of toxic hepatitis.

The swelling, called inflammation, of toxic hepatitis can lead to liver damage and scarring. Over time, this scarring, called cirrhosis, makes it hard for the liver to do its job.

Toxic hepatitis, even without cirrhosis, can lead to liver failure. The only cure for ongoing liver failure is to replace the liver with a healthy one from a donor, called a liver transplant.

Because you can't know how you'll react to a medicine, you can't always prevent toxic hepatitis. But you might cut the risk of liver problems if you:

• Limit medicines. Take medicine only when you must. Instead, look for lifestyle choices for common problems such as high blood pressure, high cholesterol and arthritis pain.
• Take medicines only as directed. Follow the directions exactly for any medicine you take. Don't take more than the dose amount, even if symptoms don't seem to improve. It can be easy to take too much of medicines that wear off before it's time for the next dose.
• Be cautious with herbs and supplements. Natural products can cause harm. Discuss the benefits and risks with a healthcare professional before taking herbs and supplements. The National Institutes of Health has the LiverTox website. It shows medicines and supplements that are linked to liver damage.
• Don't mix alcohol and medicines. If you're taking acetaminophen, don't drink alcohol. Ask a healthcare professional or pharmacist about how alcohol affects other medicines you use.
• Be careful with chemicals. If you work with or use dangerous chemicals, take all measures to protect yourself from them. If you come into contact with a harmful substance, follow the guidelines in your workplace. Or call your local emergency services or a poison control center for help.
• Keep medicines and chemicals away from children. Use childproof containers and keep them out of children's reach.

To diagnose toxic hepatitis, a healthcare professional takes a medical history and does a physical exam. Bring to your appointment all medicines you take in the containers they came in. Tell your health professional if you work with industrial chemicals or may have been exposed to pesticides, herbicides or other environmental toxins.

Tests might include:

• Blood tests. Blood tests look for high levels of certain liver enzymes and check how well the liver is working.
• Imaging tests. These tests take pictures of the liver using ultrasound, computerized tomography (CT) or magnetic resonance imaging (MRI). There might be other imaging tests as well.
• Liver biopsy. A liver biopsy can help confirm the diagnosis of toxic hepatitis and help rule out other causes. During a liver biopsy, a needle is used to take a small sample of tissue from the liver. The sample is checked under a microscope.

Treatment depends on what's causing the liver damage. Often, stopping contact with the cause will reduce symptoms.

Treatments for toxic hepatitis may include:

• Supportive care. People with severe symptoms are likely to get therapy in a hospital. This might include having fluids through a vein and taking medicine to relieve nausea and vomiting. A healthcare professional watches the liver for damage.
• Medicine to reverse liver damage caused by acetaminophen. Treatment for liver damage caused by an overdose of acetaminophen includes getting a medicine called N-acetylcysteine right away. The sooner this medicine is given after the overdose, the greater the chance of limiting liver damage. It works best within 16 hours of the acetaminophen overdose.
• Emergency care. For people who overdose on a toxic medicine, emergency care is vital. People who overdose on certain medicines other than acetaminophen might have treatments to remove the medicine from the body or lessen its toxic effect.

• Liver transplant. When the liver is badly damaged, a liver transplant may be the only choice for some people. A liver transplant is an operation to remove the diseased liver and replace it with a healthy liver from a donor.

  Most livers used in liver transplants come from people who have died. Sometimes livers come from living donors who donate a part of their livers.

Make an appointment with someone on your primary healthcare team if you have symptoms that worry you. You might then be referred to a liver specialist, called a hepatologist.

Here's some information to help you get ready for your appointment.

What you can do

Take a family member or friend along, if possible, to help you remember the information you get.

Make a list of:

• Your symptoms and when they began.
• Key personal information, including major stresses or recent life changes, and family history of liver disease.
• All medicines, vitamins and supplements you take, including doses. Even better, bring them to your appointment in the containers they came in.
• Questions to ask your healthcare professional.

For toxic hepatitis, some basic questions to ask include:

• What is likely causing my symptoms?
• What are other possible causes?
• Could one of the medicines I take be harming my liver?
• Is my liver damaged?
• What tests do I need?
• Is my condition likely to go away or last?
• What is the best course of action?
• I have other health conditions. Will these conditions or their treatment affect the outcome of toxic hepatitis? How can I best manage them together?
• Are there restrictions that I need to follow?
• Are there brochures or other printed material I can have? What websites do you recommend?

Be sure to ask all the questions you have.

What to expect from your doctor

Your healthcare professional will likely ask a few questions, such as:

• Do you have symptoms all the time or do they come and go?
• How bad are your symptoms?
• What, if anything, seems to make you feel better?
• What, if anything, makes you feel worse?
• Have you started a new medicine recently?
• Do you take acetaminophen?
• Do you take herbal or nutritional supplements?
• How much alcohol do you drink and how often?
• Have you noticed yellowing in the whites of your eyes?
• Does your urine look darker than usual?