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Other drug names: A-Am An-Az B C-Ch Ci-Cz D-Dh Di-Dz E F G H I-J K-L M-Mh Mi-Mz N-Nh Ni-Nz O P-Pl Pm-Pz Q-R S-Sn So-Sz T-To Tp-Tz U-V W-Z 0-9   

Sirolimus (Systemic)

Brand Names

In the U.S.-

  • Rapamune



  • Immunosuppressant


Sirolimus (sir-OH-li-mus) belongs to a group of medicines known as immunosuppressive agents. It is used to lower the body's natural immunity in patients who receive kidney transplants.

When a patient receives an organ transplant, the body's white blood cells will try to get rid of (reject) the transplanted organ. Sirolimus works by preventing the white blood cells from getting rid of the transplanted organ.

Sirolimus is a very strong medicine. It can cause side effects that can be very serious, such as kidney problems. It may also reduce the body's ability to fight infections. You and your doctor should talk about the good this medicine will do as well as the risks of using it.

Sirolimus is available only with your doctor's prescription, in the following dosage forms:

  • Oral Solution (U.S.)
  • Tablets (U.S.)

Before Using This Medicine

In deciding to use a medicine, the risks of taking the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For sirolimus, the following should be considered:

Allergies- Tell your doctor if you have ever had any unusual or allergic reaction to sirolimus. Also tell your health care professional if you are allergic to any other substances, such as foods, preservatives, or dyes.

Pregnancy- Sirolimus has not been studied in pregnant women. However, studies in animals have shown that sirolimus causes problems in the fetus. It is very important that an effective form of birth control be used before starting sirolimus therapy, during sirolimus therapy, and for 12 weeks after sirolimus therapy has stopped.

Breast-feeding- It is not known whether sirolimus passes into human breast milk. However, because this medicine may cause serious side effects, breast-feeding may not be recommended while you are receiving it. Discuss with your doctor whether or not you should breast-feed while you are receiving sirolimus.

Other medicines- Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. When you are taking sirolimus, it is especially important that your health care professional knows if you are taking any of the following:

  • Cyclosporine (e.g. Neoral or Sandimmune) or
  • Diltiazem (e.g. Cardizem) or
  • Ketoconazole (e.g. Nizoral)-May increase the effects of sirolimus by increasing the amount of this medicine in the body
  • Rifampin (e.g. Rifadin) or
  • St. John's wort-May decrease the effects of sirolimus by decreasing the amount of sirolimus in the body
  • Tacrolimus (e.g. Prograf)-May cause liver transplant rejection or serious side effects in patients on sirolimus

Other medical problems- The presence of other medical problems may affect the use of sirolimus. Make sure you tell your doctor if you have any other medical problems, especially:
  • Cancer or
  • Hyperlipidemia (high amount of cholesterol and fats in the blood)-Sirolimus can make these conditions worse
  • Chickenpox (including recent exposure) or
  • Herpes zoster (shingles)-Risk of severe disease affecting other parts of the body
  • Infection-Sirolimus decreases the body's ability to fight infection
  • Liver disease-A lower dose of sirolimus may be needed in patients with this condition
  • Liver transplantation-Sirolimus is not recommended in liver transplant patients

Proper Use of This Medicine

This medicine usually comes with patient information or directions. Read them carefully and make sure you understand them before taking this medicine. If you have any questions, ask your health care professional.

Take this medicine only as directed by your doctor. Do not use more or less of it, and do not use it more often than your doctor ordered. The exact amount of medicine you need has been carefully worked out. Using too much will increase the risk of side effects, while using too little may lead to rejection of your transplanted kidney.

To help you remember to take your medicine, try to get into the habit of taking it at the same time each day. This will help sirolimus work better by keeping a constant amount in the blood.

Absorption of this medicine may be changed if you change your diet. This medicine should be taken consistently with respect to meals. You should not change the type or amount of food you eat unless you discuss it with your health care professional.

Do not stop taking this medicine without first checking with your doctor. You may have to take this medicine for the rest of your life to prevent your body from rejecting the transplant.

Sirolimus usually is used along with a corticosteroid (cortisone-like medicine) and cyclosporine (another immunosuppressive agent). Sirolimus should be taken 4 hours after cyclosporine modified oral solution ( Neoral , SangCya ) or cyclosporine modified capsules ( Neoral ). If you have any questions about this, ask your health care professional.

Mix sirolimus oral solution with at least 2 ounces (¼ cup, 60 milliliters [mL]) of water or orange juice in a glass or plastic container. Stir the mixture well and drink it immediately. Then, rinse the container with at least 4 ounces (½ cup, 120 mL) of additional water or orange juice, stir it well, and drink it to make sure that all of the medicine is taken.


The dose of sirolimus will be different for different patients. Follow your doctor's orders or the directions on the label. The following information includes only the average doses of sirolimus. If your dose is different, do not change it unless your doctor tells you to do so. If you have any questions about the proper dose of sirolimus, ask your doctor.

  • For oral dosage form (oral solution or tablets):
    • Adults and children 13 years of age and older weighing 88 pounds (40 kilograms) or more: The usual dose is 2 milligrams (mg) a day after an initial one-time dose of 6 mg.
    • For children 13 years of age and older who weigh less than 88 pounds (40 kilograms) : The dose is based on body size. It is usually 1 mg per square meter of body surface area once a day after an initial one-time dose of 3 mg per square meter of body surface area.
    • For children up to 13 years of age: Use and dose must be determined by your doctor.

Missed dose-

If you miss a dose of sirolimus and remember it within 12 hours, take the missed dose as soon as you remember. However, if it is almost time for the next dose, skip the missed dose, go back to your regular dosing schedule, and check with your doctor. Do not double doses.


To store this medicine:

  • Keep out of the reach of children.
  • Store the oral liquid form in the refrigerator.
  • Store tablets at room temperature.
  • Protect from exposure to light.
  • Keep the medicine from freezing.
  • Do not keep outdated medicine or medicine no longer needed. Ask your health care professional how you should dispose of any medicine you do not use. Be sure that any discarded medicine is out of the reach of children.

Precautions While Using This Medicine

It is very important that your doctor check your progress at regular visits to make sure that this medicine is working properly and to check for unwanted effects.

While you are taking sirolimus, it is important to maintain good dental hygiene and see a dentist regularly for teeth cleaning.

Raw oysters or other shellfish may contain bacteria that can cause serious illness and possibly death. This is more likely to be a problem if these foods are eaten by patients with certain medical conditions. Even eating oysters from ****œclean" water or good restaurants does not guarantee that the oysters do not contain the bacteria. Eating raw shellfish is not a problem for most healthy people; however, patients with the following conditions may be at greater risk: cancer, immune disorders, organ transplantation, long-term corticosteroid use (as for asthma, arthritis, or organ transplantation), liver disease (including viral hepatitis), excess alcohol intake (2 to 3 drinks or more per day), diabetes, stomach problems (including stomach surgery and low stomach acid), and hemochromatosis (an iron disorder). Do not eat raw oysters or other shellfish while you are taking sirolimus. Be sure oysters and shellfish are fully cooked.

While you are being treated with sirolimus, and after you stop treatment with it, it is important to see your doctor about the immunizations (vaccinations) you should receive. Do not get any immunizations without your doctor's approval. Sirolimus may lower your body's resistance and there is a chance you might get the infection the immunization is meant to prevent. In addition, other persons living in your household should not take or have recently taken oral polio vaccine since there is a chance they could pass the polio virus on to you. Also, avoid other persons who have taken the oral polio vaccine. Do not get close to them, and do not stay in the same room with them for very long. If you cannot take these precautions, you should consider wearing a protective face mask that covers the nose and mouth.

Treatment with sirolimus may also increase the chance of getting other infections. If you can, avoid people with colds or other infections. If you think you are getting a cold or other infection, check with your doctor.

Grapefruits and grapefruit juice may increase the effects of sirolimus by increasing the amount of this medicine in your body. You should not eat grapefruit or drink grapefruit juice while you taking this medicine.

Side Effects of This Medicine

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Also, because of the way sirolimus acts on the body, there is a chance that it may cause effects that may not occur until years after the medicine is used. These delayed effects may include certain types of cancer, such as lymphoma.

Check with your doctor or nurse immediately if any of the following side effects occur:

  • More common
    • Chest pain 

  • black, tarry stools;  general feeling of illness;  shortness of breath;  swollen glands ;  weight loss, unusual;  yellow skin and eyes 

Check with your doctor as soon as possible if any of the following side effects occur:

  • More common
    • Abdominal pain;  anxiousness, unexplained ;  bloody or cloudy urine;  bone pain;  chills;  confusion ;  convulsions (seizures);  cough;  decreased urge to urinate;  fast, slow, or irregular heartbeat;  fever;  frequent urge to urinate;  increased thirst;  loss of appetite;  lower back or side pain;  mood changes;  muscle pain or cramps;  nausea or vomiting ;  numbness or tingling around lips, hands, or feet ;  painful or difficult urination;  rash;  sore throat;  sores or white spots on lips or in mouth;  swelling of hands, ankles, feet, or lower legs;  swollen glands;  trouble breathing;  unusual bleeding or bruising;  unusual tiredness or weakness;  weakness or heaviness of legs 

  • Less common
    • Skin ulcer or sores 

  • Rare
    • Weight gain, unusual 

  • Unknown frequency
    • Abnormal wound healing 

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome:

  • More common
    • Acne;  constipation;  diarrhea;  difficulty in moving;  headache;  loss of energy or weakness;  muscle pain or stiffness;  pain;  shaking or trembling;  trouble in sleeping  

  • Less common
    • Nosebleed;  swelling of the face 

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

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Last updated: Tue, 06 Jan 2009 00:20:03 GMT