Tacrolimus should only be given under the supervision of a doctor who is experienced in treating people who have had an organ transplant and in prescribing medications that decrease the activity of the immune system.
Tacrolimus decreases the activity of your immune system. This may increase the risk that you will get a serious infection. If you experience any of the following symptoms, call your doctor immediately: sore throat; cough; fever; extreme tiredness; flu-like symptoms; warm, red, or painful skin; or other signs of infection.
When your immune system is not working normally, there may be a greater risk that you will develop cancer, especially lymphoma (a type of cancer that begins in the cells of the immune system). The longer you take tacrolimus or other medications that decrease the activity of the immune system, and the higher your doses of these medications, the more this risk may increase. If you experience any of the following symptoms of lymphoma, call your doctor immediately: swollen lymph nodes in the neck, armpits, or groin; weight loss; fever; night sweats; excessive tiredness or weakness; cough; trouble breathing; chest pain; or pain, swelling, or fullness in the stomach area.
Talk to your doctor about the risks of taking tacrolimus.
Tacrolimus is used along with other medications to prevent rejection (attack of a transplanted organ by the immune system of a person receiving the organ) in people who have received kidney, liver, or heart transplants. Tacrolimus is in a class of medications called immunosupressants. It works by decreasing the activity of the immune system to prevent it from attacking the transplanted organ.
Tacrolimus comes as a capsule to take by mouth. It is usually taken twice a day. Space your doses 12 hours apart, and take tacrolimus at the same times every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand. Take tacrolimus exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.
Your doctor will monitor you carefully and adjust your dose as needed. Talk to your doctor often about how you are feeling during your treatment. Ask your doctor if you have any questions about how much tacrolimus you should take.
Tacrolimus can only prevent rejection of your transplant as long as you are taking the medication. Continue to take tacrolimus even if you feel well. Do not stop taking tacrolimus without talking to your doctor.
Tacrolimus is also sometimes used to treat fistulizing Crohn's disease (a condition in which the body attacks the lining of the digestive tract, causing pain, diarrhea, weight loss, fever, and the formation of abnormal tunnels connecting the digestive tract to other organs or the skin). Talk to your doctor about the risks of using this medication to treat your condition.
This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.
Before taking tacrolimus,
Avoid eating grapefruit or drinking grapefruit juice while taking tacrolimus.
Take the missed dose as soon as you remember it. However, if it is almost time for the next dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.
Tacrolimus may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:
Some side effects can be serious. If you experience any of the following symptoms, or those mentioned in the IMPORTANT WARNING section, call your doctor immediately:
Tacrolimus may cause other side effects. Call your doctor if you have any unusual problems while you are taking this medication.
If you experience a serious side effect, you or your doctor may send a report to the Food and Drug Administration's (FDA) MedWatch Adverse Event Reporting program online [at Web Site] or by phone [1-800-332-1088].
Keep this medication in the container it came in, tightly closed, and out of reach of children. Store it at room temperature and away from excess heat and moisture (not in the bathroom). Throw away any medication that is outdated or no longer needed. Talk to your pharmacist about the proper disposal of your medication.
In case of overdose, call your local poison control center at 1-800-222-1222. If the victim has collapsed or is not breathing, call local emergency services at 911.
Symptoms of overdose may include:
Keep all appointments with your doctor and the laboratory. Your doctor will order certain tests to check your body's response to tacrolimus.
Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.
It is important for you to keep a written list of all of the prescription and nonprescription (over-the-counter) medicines you are taking, as well as any products such as vitamins, minerals, or other dietary supplements. You should bring this list with you each time you visit a doctor or if you are admitted to a hospital. It is also important information to carry with you in case of emergencies.
AHFS® Consumer Medication Information. © Copyright, The American Society of Health-System Pharmacists, Inc., 7272 Wisconsin Avenue, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.
Selected Revisions: June 1, 2008.