Calcineurin Inhibitors (Tacrolimus, Cyclosporine)
Tremor, headache, high blood pressure, elevated blood sugar, and changes in kidney function are the most frequently reported side effects across tacrolimus and cyclosporine.
Immunosuppressive MedicationsMedicines that protect your transplanted liver from rejection
Medically reviewed.
Immunosuppressive medications, also called anti-rejection drugs, are the core of long-term care after a liver transplant. They calm the immune system so it does not attack your new liver, and most transplant recipients take a combination of these medicines every day, often for life. Because they lower immune activity, they also raise the risk of infection and certain long-term side effects, which is why regular blood testing and close follow-up with your transplant team matter.
Your transplant team sets your doses and adjusts them over time. Never stop or change a medicine on your own, even if you feel well. Check with your team before you start any new medicine, supplement, or herbal product, and tell them right away about a fever, swelling, nausea, jaundice, or a change in your energy.
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About anti-rejection medicine
What Immunosuppressive Medications Do
Your immune system's job is to attack anything it sees as foreign, including bacteria, viruses, and a transplanted organ. Immunosuppressive medications, also called anti-rejection drugs, hold back this immune response so your body does not reject your new liver.
Because your immune system stays suppressed, most transplant recipients take these medications every day for the rest of their lives, unless their transplant team changes the plan. Transplant centers typically combine two or three medications from different drug classes; using more than one class lets your team use a lower dose of each drug, which can reduce side effects while still protecting your new liver.
Doses are usually highest in the weeks right after transplant, when the risk of rejection is greatest, then your team gradually tapers you down to the lowest dose that still protects the liver, guided by regular blood tests.
Drug classes
Types of Immunosuppressive Medications
Transplant teams typically combine medicines from more than one class below to protect your new liver while limiting side effects.
Calcineurin Inhibitors
- Tacrolimus (Prograf, Advagraf, Envarsus XR) — the most commonly used anti-rejection medicine, taken once or twice daily depending on the formulation.
- Cyclosporine (Neoral, Gengraf, Sandimmune) — an alternative calcineurin inhibitor used when tacrolimus is not suitable.
Antiproliferative Agents
- Mycophenolate mofetil (CellCept) — often combined with a calcineurin inhibitor and can allow a lower steroid dose.
- Azathioprine (Imuran) — used less often than newer agents but still an option for some patients.
mTOR Inhibitors and Steroids
- Sirolimus (Rapamune) and everolimus (Zortress) — mTOR inhibitors sometimes used as an alternative or add-on to calcineurin inhibitors.
- Corticosteroids such as methylprednisolone (Medrol, Solu-Medrol) and prednisolone (Orapred, Prelone) — used at higher doses right after transplant or during rejection, then tapered.
Know the terms
Immunosuppression Terms to Know
A few terms come up often when transplant teams talk about immunosuppression.
- Rejection
- The body's immune system recognizes the transplanted liver as foreign and attacks it. Lifelong immunosuppressive medicine is used to prevent this.
- Calcineurin inhibitor
- A drug class, including tacrolimus and cyclosporine, that blocks a signaling protein called calcineurin so immune cells cannot attack the new liver as effectively. Calcineurin inhibitors are the backbone of most maintenance regimens.
- Induction therapy
- The typical starting phase after transplant when doses are higher to prevent early rejection, before your team tapers to a lower, long-term maintenance dose.
- Maintenance immunosuppression
- The long-term, usually lower-dose combination of medications used for the rest of your life (or until your team changes the plan) to keep the transplanted liver protected.
- Trough level monitoring
- Regular blood tests that measure how much of a drug, such as tacrolimus, cyclosporine, or sirolimus, is in your blood, so your team can adjust the dose to stay in the safe and effective range.
- Tapering
- Reducing the immunosuppressant dose to the lowest level that still protects the liver, done gradually and only under your transplant team's guidance.
What to expect
Common Side Effects by Drug Type
Antiproliferative Agents (CellCept, Imuran)
Diarrhea, nausea, abdominal discomfort, and a lower white blood cell count, which raises infection risk, are common with mycophenolate mofetil and azathioprine.
Corticosteroids (Medrol, Prednisolone)
Increased appetite, weight gain, mood changes, elevated blood sugar, and fluid retention are common, especially at higher doses used early after transplant.
mTOR Inhibitors (Sirolimus, Everolimus)
Nausea, changes in blood counts, and elevated cholesterol can occur; sirolimus specifically requires monitoring of blood levels and cholesterol.
Staying Safe on Immunosuppressants
Because these medicines lower your immune defenses, a few precautions matter every day, not just right after transplant.
Preventing Infection
- Practice good hand hygiene and avoid close contact with people who are sick.
- Keep up with vaccines your transplant team approves; avoid live vaccines unless your team clears them.
- Attend all scheduled follow-up visits and lab tests so your team can catch problems early.
Avoiding Interactions and Long-Term Risks
- Use sunscreen and protective clothing; several immunosuppressants raise long-term skin cancer risk.
- Avoid grapefruit and grapefruit juice, which can raise blood levels of tacrolimus, cyclosporine, and sirolimus to unsafe levels.
- Check with your transplant team before starting any new medication, supplement, or herbal product, since interactions are common.
The Most Important Rule
Never stop or change your immunosuppressant dose on your own, even if you feel fine or notice side effects. Call your transplant team first.
What to expect
How Your Immunosuppression Plan Changes Over Time
Right After Transplant
Doses are typically highest in the first days and weeks, when the risk of rejection is greatest. Some patients also receive high-dose IV steroids, such as methylprednisolone, during this period.
The First Year
Your team gradually tapers your medications toward a lower maintenance dose while watching lab results closely. Many patients can stop corticosteroids within several months, though some need long-term low-dose steroids.
Long-Term Maintenance
Most recipients settle into a stable combination, often a calcineurin inhibitor with or without a second agent, taken at the lowest dose that still protects the liver. Regular blood level checks continue indefinitely.
If Rejection Occurs
If rejection is caught, your team may give high-dose steroid "pulse" therapy or temporarily increase other immunosuppressants, then adjust your long-term plan.
Diet and lifestyle
Eating Well While on Immunosuppressive Medications
A liver-friendly diet works alongside your medications, not instead of them. Some immunosuppressants raise blood sugar, blood pressure, or cholesterol, so the food choices you make can help offset those effects.
Grapefruit and grapefruit juice interact with several anti-rejection drugs and should be avoided; ask your transplant team about other foods or supplements before adding them to your routine.
Habits That Support Your New Liver
- Eat fresh, simple meals that are low in salt and low in added sugar.
- Stay physically active with daily walks or light activity, as your team approves.
- Drink enough water and get consistent, restful sleep.
- Take your medications on schedule, even on days you feel completely well.
COMMON QUESTIONS
Frequently Asked Questions
Will I need to take immunosuppressants forever?
Most transplant recipients take immunosuppressive medication for the rest of their lives. Your immune system is designed to attack anything it sees as foreign, and it continues to see the transplanted liver that way. Stopping the medication without your transplant team's guidance puts the liver at risk of rejection. Your team may change the plan over time, and doses are usually lowered to the lowest amount that still protects the liver. Any change should come from them, not from you.
How many medicines will I take after a liver transplant?
Many patients take 10 to 15 different medicines in the early period after transplant. These include pain medicines and anti-rejection drugs. The main anti-rejection medicines are tacrolimus, steroids such as prednisone, and mycophenolate mofetil. Some may need to be taken several times a day. Your transplant team usually combines two or three drugs from different classes, so each one can be used at a lower dose with fewer side effects.
What should I do if I miss a dose?
Call your transplant team right away and follow their instructions. The right step depends on which medicine you missed and how late you are, so there is no single rule for every drug. Never double up on a dose unless your team tells you to. To avoid missed doses, take each medicine exactly as prescribed and at the same time each day, including on days when you feel completely well.
Can I take other medications or supplements while on immunosuppressants?
Only after you check with your transplant team. Over-the-counter medicines, supplements, and herbal products can interact with anti-rejection drugs and change how much drug is in your blood. Some foods also interact. Grapefruit and grapefruit juice can raise blood levels of tacrolimus, cyclosporine, sirolimus, and everolimus. Ask before you start anything new, even if it seems harmless.
Why do I need so many follow-up visits and blood tests?
Regular visits and tests let your team catch problems before you feel them. Blood tests check how well your liver is working, how much medicine is in your blood, your blood counts, and your electrolytes. They can show early signs of rejection, infection, or medication side effects. Your team may also check kidney function, blood pressure, blood sugar, and cholesterol, depending on your medicines. Ultrasounds show blood flow to and from the new liver. Keep your visits even when you feel fine.
What happens if my body starts to reject the liver?
Rejection is treatable, especially when it is found early. It happens when your immune system attacks the transplanted liver. Treatment often means adjusting your medicines, such as giving high-dose steroids for a short time (sometimes called pulse therapy) or temporarily increasing other immunosuppressants. Your team then reviews your long-term plan. Tell them right away about a fever, swelling, nausea, jaundice, or a change in your energy. A notebook or phone app for symptoms helps you describe changes clearly.
How can I lower my risk of infection and skin cancer?
Daily habits make a real difference, because these medicines lower your immune defenses. Wash your hands often and avoid close contact with people who are sick. Ask your transplant team before any vaccine, since live vaccines should be avoided unless they approve them. Use sunscreen and wear protective clothing, because some immunosuppressants raise the long-term risk of skin cancer. Keep every scheduled lab test and follow-up visit so your team can spot problems early.
Medical disclaimer: LiverDirectory provides educational information and a directory of providers. It does not provide medical advice, diagnosis, or treatment. Always consult a licensed physician regarding any medical condition.