Lifileucel (Amtagvi™)

Author: Karen Arnold-Korzeniowski, MSN RN
Content Contributor: Christopher Tweed, PharmD, BCOP - Oncology Clinical Pharmacy Specialist
Last Reviewed: February 23, 2026

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Pronounce: LIF-i-LOO-sel

Classification: Tumor Derived Autologous T-Cell Immunotherapy

About Lifileucel (Amtagvi™)

Lifileucel (Amtagvi™) is a tumor derived autologous t-cell immunotherapy. T-cells, a part of your immune system, are removed from a part of your tumor in a lab. These T-cells are put back into cancer cells. These T-cells are then infused back into your body after you receive chemotherapy to help your immune system fight the cancer cells.

How to Take Lifileucel (Amtagvi™)

Lifileucel is given through an intravenous (IV) infusion. Your dose will be personalized to you. You will be given chemotherapy in the days before the infusion to prepare your body for treatment with lifileucel. Before the infusion, you will be given pre-medications including acetaminophen (Tylenol) and an H1 antihistamine such as diphenhydramine (Benadryl) to prevent a reaction. Some people do have reactions like fevers, chills, shaking, higher than normal heart rate, rash, low blood pressure, shortness of breath, cough, chest tightness, or wheezing. If you have any changes in how you are feeling, tell your provider right away.

You will be given certain medications hours after your infusion to help your body and immune system recover from the treatment. Corticosteroids should only be taken as prescribed as they can interfere with this treatment.

You will be in the hospital until you have recovered from any serious side effects you are having. Depending on where you received your treatment and how you are doing, you may be asked to stay within 2 hours of the treatment center for several weeks. Your providers will monitor your recovery closely.

Possible Side Effects

These are some of the most common or most serious side effects of this medication. Talk with your provider about the side effects you are having and how they can be managed.

Infection and Low White Blood Cell Count (Leukopenia or Neutropenia)

This medication can cause serious infections, with or without a decrease in white blood cell counts.

White blood cells (WBC) help your body fight infection. While you are having cancer treatment, your WBC count can drop, putting you at a higher risk of an infection. Tell your provider right away if you have a fever (a temperature greater than 100.4°F or 38°C), sore throat or cold, shortness of breath, cough, burning with urination, or a sore that doesn't heal.

Tips for preventing infection:

  • Hand washing,  both yours and your visitors, is the best way to prevent the spread of infection.
  • Avoid large crowds and people who are sick (those who have a cold, fever, or cough, or if someone you live with has these symptoms).
  • When working outside, wear clothes that protect you, like long pants and gloves.
  • Do not handle pet waste.
  • Keep all cuts and scratches clean.
  • Shower or bathe daily.
  • Brush your teeth at least twice a day.
  • Do not cut cuticles or ingrown nails. You may wear nail polish, but not fake nails.
  • Ask your providers before scheduling dental appointments or procedures.

Ask your providers before you or someone you live with has any vaccines

Low Platelet Count (Thrombocytopenia)

Platelets are blood cells that help your blood clot. Thrombocytopenia is when your platelet count is lower than normal, and you are at a higher risk of bleeding. Tell your providers if you have any bruising or bleeding, including nose bleeds, bleeding gums, or blood in your urine or stool. If your count gets too low, you may receive platelets from a donor. 

  • Do not use a razor (an electric razor is fine).
  • Do not do activities that can cause injury or bleeding.
  • Talk to your provider before taking any non-steroidal, anti-inflammatory medications (NSAIDs) like Motrin/Advil (ibuprofen), Aleve (naproxen), Celebrex (celecoxib), and others. These can raise the risk of bleeding. 
  • Use a soft-bristle toothbrush to brush your teeth. Ask your provider about flossing or using toothpicks. 

Low Red Blood Cell Count (Anemia)

Anemia is when your red blood cell count is lower than normal. Red blood cells carry oxygen to the tissues in your body. When your red cell count is low, you may feel tired or weak. Tell your providers if you have shortness of breath, trouble breathing, or pain in your chest. If your count gets too low, you may receive a blood transfusion.

Heart Problems

This medication can cause or worsen pre-existing heart problems, like congestive heart failure, restrictive cardiomyopathy, decreased heart function, and heart attack. Symptoms may be:

  • Sudden weight gain.
  • Swelling in your ankles or legs.
  • Chest pain or pressure.
  • Pain in your left arm, back, or jaw.
  • Sweating.
  • Shortness of breath.
  • Clammy skin.
  • Nausea.
  • Dizziness or lightheadedness.

If you have any of these symptoms, call 911.

Kidney Problems

This medication can cause kidney problems, like an increased creatinine level. Your provider may monitor for kidney problems with blood tests. Symptoms may be:

  • Less urine output than normal.
  • Blood in the urine.
  • Swelling in the ankles.
  • Loss of appetite.

Tell your provider if you have any of these symptoms.

Nausea and/or Vomiting

Talk to your providers if you have nausea and/or vomiting. They can prescribe medications to help you. Making changes to your diet can also help. Avoid things that make your symptoms worse, like heavy or greasy/fatty foods and spicy or acidic foods, like tomatoes, lemons, and oranges. Try saltines or ginger ale to help your symptoms.  

Call your providers if you cannot keep fluids down for more than 12 hours or if you feel lightheaded or dizzy.

Fatigue

Fatigue can cause exhaustion, feeling worn out and that your body is "heavy" and hard to move, or being unable to focus. It is common when you have cancer, and it is not the same as feeling tired. You may need to adjust your schedule to manage fatigue. Plan times to rest during the day and save your energy for more important activities. Exercise can help lessen fatigue. Talk to your providers about ways to deal with this side effect.

Diarrhea

Diarrhea is when you pass three or more stools in a day. Your providers can suggest medications to relieve diarrhea. Do not take any medications to manage your diarrhea without talking to your provider first, as your stool may need to be tested. To manage it, try eating foods that are low in fiber and bland, like white rice and boiled or baked chicken. Try not to eat raw fruits, vegetables, whole grain breads, cereals, and seeds. Soluble fiber is a type of fiber found in some foods that helps absorb (soak up) fluid. Foods high in soluble fiber are applesauce, bananas (ripe), canned fruit, oranges, boiled potatoes, white rice, foods made with white flour, oatmeal, cream of rice, cream of wheat, and farina. Stay hydrated by drinking 8 to 10 glasses of non-alcoholic, non-caffeinated fluid each day.

Peripheral Edema

Peripheral edema is swelling in your hands, arms, legs, ankles, and feet. It is caused by retention (buildup) of fluid. To help get rid of the fluid, you can elevate (lift up) the affected body part and rest it on a pillow. You may need medications to help your body get rid of the extra fluid, and you may be told to follow a low salt diet. Tell your providers if you have any new or worsening swelling.

Decrease in Appetite or Taste Changes

Nutrition is an important part of your care. Cancer treatment can affect your appetite and make it hard to eat. Ask your provider about nutrition counseling services. Some tips you can follow are:

  • Try to eat five or six small meals or snacks during the day, instead of 3 larger meals.
  • Nutritional supplements may help if you are not eating enough.
  • You may have a metallic taste or find that food has no taste. You may dislike foods or beverages that you liked before cancer treatment. These symptoms can last for months or longer after treatment ends.
  • Avoid any food that you think smells or tastes bad. If red meat is a problem, eat chicken, turkey, eggs, dairy products, and fish without a strong smell. Sometimes cold food has less of an odor.
  • Add extra flavor to meat or fish by marinating it in sweet juices, sweet and sour sauce, or dressing.
  • Use seasonings like basil, oregano, or rosemary to add flavor.

Loss or Thinning of Scalp and Body Hair (Alopecia)

Alopecia is when your hair gets thin, brittle (breaks easily), or falls out. This may happen during the few weeks after treatment starts. Hair loss can be all of your body hair, including pubic, underarm, legs/arms, eyelashes, and nose hairs. You may want to use scarves, wigs, hats, and hairpieces. Your hair helps keep you warm in cold weather, and it can protect you from the sun, so it is important to wear a hat if you are in cold weather or in the sun. If you are going to be out in the sun, protect your scalp by using a sunscreen with SPF 30 or higher. Wash your scalp with a mild or baby shampoo. After you are done with treatment, hair often starts to grow back.

Reproductive Concerns

There is a higher risk of health problems for your baby if you are pregnant, become pregnant, or get someone pregnant while on this medication. To lower the risk of birth defects, you should use birth control (contraception) to avoid pregnancy. Talk with your provider about what kind of birth control is safest for you and your partner.