Class Name(s):

• 10:00 Antineoplastic Agents

Pronunciation:

• (boe sue' ti nib)

Brand Name(s):

• Bosulif^®

WHY is this medicine prescribed?

Bosutinib is used to treat a certain type of chronic myeloid leukemia (CML; a type of cancer of the white blood cells), including treatment in adults who have been recently found to have this condition and in those who can no longer benefit from other medications for CML or who cannot take these medications because of side effects. Bosutinib is in a class of medications called kinase inhibitors. It works by blocking the action of an abnormal protein that signals cancer cells to multiply. This helps stop the spread of cancer cells.

HOW should this medicine be used?

Bosutinib comes as a tablet to take by mouth. It is usually taken with food once a day. Take bosutinib at around the same time 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 bosutinib exactly as directed. Do not take more or less of it or take it more often than prescribed by your doctor.

Swallow the tablets whole; do not split, chew, or crush them. If any of the tablets are broken or crushed, do not touch them with your bare hands.

Your doctor may temporarily or permanently stop your treatment or adjust your dose of bosutinib depending on your response to treatment and any side effects that you experience. Talk to your doctor about how you are feeling during your treatment. Continue to take bosutinib even if you feel well. Do not stop taking bosutinib without talking to your doctor.

Ask your pharmacist or doctor for a copy of the manufacturer's information for the patient.

Are there OTHER USES for this medication?

This medication may be prescribed for other uses; ask your doctor or pharmacist for more information.

What SPECIAL PRECAUTIONS should I follow?

Before taking bosutinib,

• tell your doctor and pharmacist if you are allergic to bosutinib or any of the ingredients in bosutinib tablets. Ask your pharmacist for a list of the ingredients.
• tell your doctor and pharmacist what other prescription and nonprescription medications, vitamins, nutritional supplements, and herbal products you are taking or plan to take. Be sure to mention any of the following: certain antifungals such as ketoconazole and itraconazole (Sporanox); aprepitant (Emend); certain medications used to treat human immunodeficiency virus (HIV) such as indinavir (Crixivan), nelfinavir (Viracept), ritonavir (Norvir), and saquinavir (Invirase); medications to reduce stomach acid (proton-pump inhibitors) such as esomeprazole (Nexium), lansoprazole (Prevacid), omeprazole (Prilosec), pantoprazole (Protonix), and rabeprazole (AcipHex); diltiazem (Cardizem, Cartia, Tiazac); erythromycin (E.E.S., E-Mycin, Erythrocin); nefazodone; rifabutin (Mycobutin); and rifampin (Rifadin, Rimactane in Rifamate, in Rifater). Many other medications may also interact with bosutinib, so be sure to tell your doctor about all the medications you are taking, even those that do not appear on this list.
• if you are taking antacids, such as aluminum hydroxide/magnesium hydroxide (Maalox), calcium carbonate (Tums) or calcium carbonate and magnesium (Rolaids) or medications to reduce stomach acid, such as cimetidine (Tagamet), famotidine (Pepcid), or ranitidine (Zantac), take them 2 hours before or 2 hours after you take bosutinib.
• tell your doctor what herbal products you are taking, especially St. John's wort.
• tell your doctor if you have or have ever had high blood pressure, diabetes, or kidney, liver, or heart disease.
• tell your doctor if you are pregnant or plan to become pregnant. You will need to take a pregnancy test before you start treatment and you should not become pregnant while you are taking bosutinib. You should use an effective form of birth control during treatment with bosutinib and for 2 weeks after your final dose. Talk to your doctor about birth control methods that will work for you. If you become pregnant while taking bosutinib, call your doctor. Bosutinib may harm the fetus.
• tell your doctor if you are breastfeeding. You should not breastfeed while you are taking bosutinib and for 2 weeks after your last dose.
• you should know that this medication may decrease fertility in men and women. Talk to your doctor about the risks of taking bosutinib.

What SPECIAL DIETARY instructions should I follow?

Do not eat grapefruit, drink grapefruit juice, or take any supplement containing grapefruit extract while taking this medication.

What should I do IF I FORGET to take a dose?

Take the missed dose with food as soon as you remember it. However, if it has been more than 12 hours since your last dose, skip the missed dose and continue your regular dosing schedule. Do not take a double dose to make up for a missed one.

What SIDE EFFECTS can this medicine cause?

Bosutinib may cause side effects. Tell your doctor if any of these symptoms are severe or do not go away:

• headache
• loss of appetite
• tiredness or weakness

• change in ability to taste food
• ringing in the ears

Some side effects can be serious. If you experience any of these symptoms, call your doctor immediately:

• nausea
• vomiting
• diarrhea
• sudden stomach area pain
• unexplained bleeding or bruising
• blood in urine or stool
• change in the frequency of urination
• increase or decrease in the amount of urine
• dizziness
• fever, sore throat, chills, or other signs of infection
• shortness of breath and cough
• chest pain
• swelling of face, hands, ankles, feet, or lower legs
• sudden weight gain
• yellowing of the skin and eyes
• dark or tea-colored urine
• hives
• rash
• itching
• difficulty breathing or swallowing

Bosutinib may cause other side effects. Call your doctor if you have any unusual problems while 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 (http://www.fda.gov/Safety/MedWatch) or by phone (1-800-332-1088).

What should I do in case of OVERDOSE?

In case of overdose, call the poison control helpline at 1-800-222-1222. Information is also available online at http://www.poisonhelp.org/help. If the victim has collapsed, had a seizure, has trouble breathing, or can't be awakened, immediately call emergency services at 911.

What should I know about STORAGE and DISPOSAL of this medication?

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).

Keep all medication out of sight and reach of children as many containers are not child-resistant. Always lock safety caps. Place the medication in a safe location - one that is up and away and out of their sight and reach. http://www.upandaway.org

Dispose of unneeded medications in a way so that pets, children, and other people cannot take them. Do not flush this medication down the toilet. Use a medicine take-back program. Talk to your pharmacist about take-back programs in your community. Visit the FDA's Safe Disposal of Medicines website http://goo.gl/c4Rm4p for more information.

What OTHER INFORMATION should I know?

Keep all appointments with your doctor and the laboratory. Your doctor will order certain lab tests to check your body's response to bosutinib.

Do not let anyone else take your medication. Ask your pharmacist any questions you have about refilling your prescription.

Keep a written list of all of the prescription and nonprescription (over-the-counter) medicines, vitamins, minerals, and dietary supplements you are taking. Bring this list with you each time you visit a doctor or if you are admitted to the hospital. You should carry the list with you in case of emergencies.

This report on medications is for your information only, and is not considered individual patient advice. Because of the changing nature of drug information, please consult your physician or pharmacist about specific clinical use.

The American Society of Health-System Pharmacists, Inc. represents that the information provided hereunder was formulated with a reasonable standard of care, and in conformity with professional standards in the field. The American Society of Health-System Pharmacists, Inc. makes no representations or warranties, express or implied, including, but not limited to, any implied warranty of merchantability and/or fitness for a particular purpose, with respect to such information and specifically disclaims all such warranties. Users are advised that decisions regarding drug therapy are complex medical decisions requiring the independent, informed decision of an appropriate health care professional, and the information is provided for informational purposes only. The entire monograph for a drug should be reviewed for a thorough understanding of the drug's actions, uses and side effects. The American Society of Health-System Pharmacists, Inc. does not endorse or recommend the use of any drug. The information is not a substitute for medical care.

AHFS^® Patient Medication Information™ Copyright, 2025. The American Society of Health-System Pharmacists^®, 4500 East-West Highway, Suite 900, Bethesda, Maryland. All Rights Reserved. Duplication for commercial use must be authorized by ASHP.

Selected Revisions: September 15, 2021.