Afinitor Side Effects

Understanding possible reactions to Afinitor

Afinitor may cause side effects. Every patient's experience with Afinitor will be different. Some people will experience more side effects and some will experience fewer. Remember to talk to your doctor about any side effects you experience and together you can work to find a way to manage them.

Serious side effects have been reported with Afinitor:

  • You may develop lung or breathing problems. In some people, lung or breathing problems may be severe and can even lead to death. You may need to stop Afinitor for a while or use a lower dose. Tell your healthcare provider right away if you have any of these symptoms:
    • New or worsening cough
    • Shortness of breath
    • Chest pain
    • Difficulty breathing, or wheezing
  • You may be more likely to develop an infection, such as pneumonia, or a bacterial, fungal, or viral infection. Viral infections may include active hepatitis B in people who have had hepatitis B in the past (reactivation). In some people these infections may be severe and can even lead to death. You may need to be treated as soon as possible. Tell your healthcare provider right away if you have a temperature of 100.5° F or above, chills, or do not feel well. Symptoms of hepatitis B or infection may include:
    • Fever
    • Skin rash
    • Joint pain and inflammation
    • Tiredness
    • Loss of appetite
    • Nausea
    • Pale stool or dark urine
    • Yellowing of the skin
    • Pain in your upper right side
  • You may develop kidney failure. In some people this may be severe and can even lead to death. Your doctor should do tests to check your kidney function before and during your treatment with AFINITOR.

If you have any of the serious side effects listed above, you may need to stop taking Afinitor for a while or use a lower dose. Follow your healthcare provider's instructions.

Common Afinitor side effects

Some of the most common side effects associated with Afinitor include:

  • Mouth ulcers and sores. Tell your healthcare provider if you have pain, discomfort, or open sores in your mouth. Your health care provider may tell you to use a special mouthwash or mouth gel that does not contain alcohol or peroxide.
  • Feeling weak or tired
  • Cough, shortness of breath
  • Diarrhea
  • Rash, dry skin, and itching
  • Nausea and vomiting
  • Fever
  • Loss of appetite
  • Swelling of arms, hands, feet, ankles, face, or other parts of the body
  • Abnormal taste
  • Inflammation of lining of digestive system
  • Headache
  • Nosebleeds
  • Pains in arms and legs

Tell your healthcare provider if you have any side effect that bothers you or does not go away.

Everyone reacts differently
to different medicines

Tell your healthcare provider if you have any side effect that bothers you or does not go away. These are not all of the possible side effects of Afinitor. For more information, ask your healthcare provider or pharmacist.


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Afinitor is a prescription medicine used to treat people with advanced kidney cancer (renal cell carcinoma or RCC) when certain other medicines have not worked (ie, Sutent® [sunitinib] or Nexavar® [sorafenib]).

Important Safety Information

Patients should not take AFINITOR if they are allergic to AFINITOR or to any of its ingredients. Patients should tell their healthcare provider before taking AFINITOR if they are allergic to sirolimus (Rapamune®) or temsirolimus (Torisel®).

AFINITOR can cause serious side effects including lung or breathing problems, infections and kidney failure, which can even lead to death. If patients experience these side effects, they may need to stop taking AFINITOR for a while or use a lower dose. Patients should follow their healthcare provider's instructions.

Lung or Breathing Problems: In some patients, lung or breathing problems may be severe, and can even lead to death. Patients should tell their healthcare provider right away if they have any of these symptoms: new or worsening cough, shortness of breath, chest pain, difficulty breathing or wheezing.

Infections: AFINITOR may make patients more likely to develop an infection, such as pneumonia, or a bacterial, fungal, or viral infection. Viral infections may include reactivation of hepatitis B in people who have had hepatitis B in the past. In some people these infections may be severe, and can even lead to death. Patients may need to be treated as soon as possible. Patients should tell their healthcare provider right away if they have a temperature of 100.5°F or above, chills, or do not feel well. Symptoms of hepatitis B or infection may include the following: fever, skin rash, joint pain and inflammation, tiredness, loss of appetite, nausea, pale stool or dark urine, yellowing of the skin, or pain in the upper right side.

Kidney Failure: AFINITOR may cause kidney failure. In some people this may be severe and can even lead to death. Patients should have tests to check their kidney function before and during their treatment with AFINITOR.

Mouth Ulcers: AFINITOR can cause mouth ulcers and sores. Patients should tell their healthcare provider if they have pain, discomfort, or open sores in their mouth. Their healthcare provider may tell them to use a special mouthwash or mouth gel that does not contain alcohol or peroxide.

Blood Tests: Patients will have regular blood tests before they start AFINITOR and as needed during their treatment. These will include tests to check the patient's blood cell count, kidney and liver function, and blood sugar levels.

Other Medicines/Food and AFINITOR: AFINITOR may affect the way other medicines work, and other medicines can affect how AFINITOR works. Using AFINITOR with other medicines can cause serious side effects. Patients should tell their healthcare provider about all of the medicines they take, including prescription and non-prescription medicines, vitamins, and herbal supplements such as: St. John's Wort and medicine for fungal infections, bacterial infections, tuberculosis, seizures, HIV-AIDS, heart conditions or high blood pressure, and medicines that suppress their immune system. Patients should not drink grapefruit juice or eat grapefruit during their treatment with AFINITOR as it may make the amount of AFINITOR in their blood increase to a harmful level.

Patients should not take AFINITOR tablets which are broken or crushed. Patients should not chew or crush the tablets.

Liver Problems and Other Medical Conditions: The amount of AFINITOR in the blood was increased in patients who had liver problems. Patients should tell their healthcare provider about all their medical conditions including if they have or have had liver problems, diabetes or high blood sugar, high cholesterol levels, infections, hepatitis B, or other medical conditions.

Vaccinations: Patients should tell their healthcare provider if they are scheduled to receive any vaccinations. Patients should not receive a live vaccine or be around people who have recently received a live vaccine during treatment with AFINITOR.

Use in Pregnancy: It is not known if AFINITOR will harm an unborn baby. Women should use effective birth control while using AFINITOR and for 8 weeks after stopping treatment.

Common Side Effects: Common side effects of AFINITOR include mouth ulcers; feeling weak or tired; cough and shortness of breath; diarrhea; skin problems (such as rash, dry skin, and itching); nausea and vomiting; fever; loss of appetite; swelling of arms, hands, feet, ankles, face or other parts of the body; abnormal taste; inflammation of lining of the digestive system; headache; nose bleeds; and pain in arms and legs.

Patients should tell their healthcare provider if they have any side effect that bothers them or does not go away.

You are encouraged to report negative side effects of prescription drugs to the FDA. Visit www.fda.gov/medwatch, or call 1-800-FDA-1088.

Please see Full Prescribing Information for AFINITOR



Sutent®, Rapamune® and Torisel® are registered trademarks of Pfizer Inc.
Nexavar® is a registered trademark of Onyx Pharmaceuticals, Inc. and Bayer HealthCare Pharmaceuticals, Inc.