Granisetron Extended-Release Injection

What is this medication?

GRANISETRON (gra NI se tron) prevents nausea and vomiting from chemotherapy. It works by blocking substances in your body that may cause nausea and vomiting. It belongs to a class of medications called antiemetics.

This medicine may be used for other purposes; ask your health care provider or pharmacist if you have questions.

COMMON BRAND NAME(S): Sustol

What should I tell my care team before I take this medication?

They need to know if you have any of these conditions:

• Dry hard stool that will not pass out of your rectum
• An unusual or allergic reaction to granisetron, ondansetron, other medications, foods, dyes, or preservatives
• Pregnant or trying to get pregnant
• Breast-feeding

How should I use this medication?

This medication is for injection under the skin. It is given in a hospital or clinic setting.

A special MedGuide will be given to you before each treatment. Be sure to read this information carefully each time.

Overdosage: If you think you have taken too much of this medicine contact a poison control center or emergency room at once.

NOTE: This medicine is only for you. Do not share this medicine with others.

What if I miss a dose?

It is important not to miss your dose. Call your care team if you are unable to keep an appointment.

What may interact with this medication?

Do not take this medication with any of the following:

• Certain medications for fungal infections like fluconazole, itraconazole, ketoconazole, posaconazole, voriconazole
• Cisapride
• Dronedarone
• Pimozide
• Thioridazine

This medication may also interact with the following:

• Certain medications for depression, anxiety, or psychotic disturbances
• Fentanyl
• Linezolid
• MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate
• Methylene blue (injected into a vein)
• Other medications that prolong the QT interval (cause an abnormal heart rhythm) like dofetilide, ziprasidone
• Phenobarbital
• Tramadol

This list may not describe all possible interactions. Give your health care provider a list of all the medicines, herbs, non-prescription drugs, or dietary supplements you use. Also tell them if you smoke, drink alcohol, or use illegal drugs. Some items may interact with your medicine.

What should I watch for while using this medication?

This medication will cause constipation. Try to have a bowel movement at least every 2 to 3 days. If you do not have a bowel movement for 3 days, call your care team.

What side effects may I notice from receiving this medication?

Side effects that you should report to your care team as soon as possible:

• Allergic reactions—skin rash, itching, hives, swelling of the face, lips, tongue, or throat
• Bowel blockage—stomach cramping, unable to have a bowel movement or pass gas, loss of appetite, vomiting
• Irritability, confusion, fast or irregular heartbeat, muscle stiffness, twitching muscles, sweating, high fever, seizure, chills, vomiting, diarrhea, which may be signs of serotonin syndrome

Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):

• Constipation
• Diarrhea
• Dizziness
• Fatigue
• Headache
• Pain, redness, or irritation at injection site
• Stomach pain
• Trouble sleeping

This list may not describe all possible side effects. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Where should I keep my medication?

This medication is given in a hospital or clinic and will not be stored at home.

NOTE: This sheet is a summary. It may not cover all possible information. If you have questions about this medicine, talk to your doctor, pharmacist, or health care provider.