What is this medicine?

GRANISETRON (gra NI se tron) is an antiemetic. It is used to prevent nausea and vomiting caused by chemotherapy.

How should I use this medicine?

This medicine is for injection under the skin. It is given by a health care professional 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.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

• allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue

• breathing problems

• confusion

• constipation

• dizziness

• fast, irregular heartbeat

• feeling faint or lightheaded, falls

• fever and chills

• loss of balance or coordination

• seizures

• skin irritation or skin reaction

• sweating

• tightness in the chest

• tremors

• unusually weak or tired

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

• diarrhea

• headache

What may interact with this medicine?

Do not take this medicine with any of the following medications:

• certain medicines for fungal infections like fluconazole, itraconazole, ketoconazole, posaconazole, voriconazole

• cisapride

• dofetilide

• dronedarone

• pimozide

• thioridazine

• ziprasidone

This medicine may also interact with the following medications:

• certain medicines for depression, anxiety, or psychotic disturbances

• fentanyl

• linezolid

• MAOIs like Carbex, Eldepryl, Marplan, Nardil, and Parnate

• methylene blue (injected into a vein)

• other medicines that prolong the QT interval (cause an abnormal heart rhythm)

• phenobarbital

• tramadol

What if I miss a dose?

It is important not to miss your dose. Call your doctor or health care professional if you are unable to keep an appointment.

Where should I keep my medicine?

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

What should I tell my health care provider before I take this medicine?

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 medicines, foods, dyes, or preservatives

• pregnant or trying to get pregnant

• breast-feeding

What should I watch for while using this medicine?

This medicine 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 doctor or health care professional.