Drug Formulary information is intended for use by healthcare professionals. It is not intended to be medical advice. Some of the information, including information about funding for cancer drugs, does not apply to all patients. Cancer treatment plans are unique to each patient. If you are a patient, please speak with your healthcare team to understand how this information applies to you.

drug-infosheet

streptozocin

Other Names
Zanosar®
Appearance
Clear, pale yellow solution mixed into larger bags of fluids
Medication Information Sheet
streptozocin (strep-TOE-zoe-sin)
This document provides general information about your medication. It does not replace the advice of your health care professional. Always discuss your therapy with your health care professional and refer to the package insert for more details.

Other Name: Zanosar®

Appearance:
Clear, pale yellow solution mixed into larger bags of fluids

What is this medication for?
  • For treating a certain type of cancer arising in the pancreas.
What should I do before I have this medication?
  • Tell  your doctor if you have/had significant medical condition(s), especially if you have / had kidney disease or any allergies.
  • Streptozocin may harm the unborn baby.
  • Let your doctor know if you are breastfeeding, pregnant or plan to become pregnant.
  • People who have cancer  are at a higher risk of developing other cancers or blood clots. Also, some cancer medications may increase these risks. You should discuss these with your doctor.
How will this medication affect sex, pregnancy and breastfeeding?
  • Do not use streptozocin if you are pregnant. If there is ANY chance that you or your partner may become pregnant, you and your partner together must:►Use 2 effective forms of birth control at the same time while taking this drug: Keep using birth control until 6 months after the last dose (general recommendation). Discuss with your healthcare team.
  • Tell your doctor right away if you or your partner becomes pregnant.
  • Do not breastfeed while on streptozocin treatment.
  • Effects on Fertility: Probable
  • Effects on Fertility: Probable
How is this medication given?
  • This drug is given by injection into a vein.

 

 

 

 

What else do I need to know while on this medication?
  • This medication can interact with other medications and can result in the treatment not working as well or cause severe side effects.

  • Make sure your health care team knows about all your medications (prescription, over-the-counter, herbals and supplements). Check with your health care team before starting or stopping any of them.

What are the side effects of this medication?

The following side effects are common or severe. You may not have all of the side effects. Other side effects may occur. If you have any unusual or bothersome symptoms, discuss with your doctor.
 

Side effects and what to do When to contact doctor?
More Common Side Effects

Unusual bleeding or bruising

You may have black stools, cough up blood, blood in your urine, purple or red dots on your skin or bleeding that will not stop. 

Fever, chills, infection

You have a fever if your temperature taken in your mouth (oral temperature) is:

  • 38.3°C (100.9°F) or higher at any time OR
  • 38.0°C (100.4°F) or higher for at least one hour.

While you are getting chemotherapy treatments:

  • Keep a digital thermometer at home and take your temperature if you feel hot or unwell (for example, chills).
  • Avoid taking medications that treat a fever before you take your temperature (for example, Tylenol®, acetaminophen, Advil® or ibuprofen) as they may hide a fever.
  • Do not eat or drink anything hot or cold right before taking your temperature.
  • Wash your hands often.

 

  • Check with your doctor before getting any vaccines, surgeries or visiting your dentist.

If you have a fever, talk to your health care team or go to the closest emergency room. 
See our Neutropenia (Low white blood cell count) pamphlet for more information.

Get emergency medical help right away

Nausea and vomiting

  • May occur in hours to days after the dose is given/ after treatment starts.
  • Drink clear fluids and avoid large meals. Get fresh air and rest.
  • Limit spicy, fried foods or foods with a strong smell.
  • Take anti-nausea drug(s) exactly as directed by your doctor. It is easier to prevent nausea than to treat it.
  • Contact your doctor if nausea lasts more than 1 day or if any vomiting occurs.
  • Also see Nausea & Vomiting pamphlet.*
Contact your health care team if no improvement or if severe

Proteins in Urine; Kidney problems
(lower back pain, body swelling- may be severe and life-threatening)

  • Also look for passing little or no urine, darkening or blood in urine, or recent unusual weight gain 
  • Your doctor may monitor for proteins in the urine regularly.
Get emergency medical help right away

Side effects and what to do When to contact doctor?
Less Common Side Effects, but may be Severe

Liver problems
(yellow skin or eyes, dark urine)

Get emergency medical help right away

Salt imbalances
(muscle twitching, weakness or cramping, confusion, irregular heartbeat), may be severe (general body swelling with confusion)

Get emergency medical help right away

Poor Appetite; don't feel like eating; weight loss

  • Eat foods that you like and try to eat regular small meals.
  • Use meal supplements if possible.  See a dietitian.

 

Contact your health care team if no improvement or if severe

Diarrhea

  • May occur days to weeks after the drug is given / after treatment starts
  • Drink plenty of clear fluids. Limit hot, spicy, fried foods, foods/drinks with caffeine, orange or prune juice. 
  • Try a low-fiber BRAT diet (Bananas, white Rice, Apple sauce, Toast made with white bread).
  • Take anti-diarrhea drug(s) if given to you by your doctor.
  • Also see Diarrhea pamphlet.*
Contact your health care team if no improvement or if severe

Pain, burning, redness, or swelling on skin where drug was injected

  • Let your healthcare team know right away when this happens, since this drug can harm or irritate tissues if it leaks from the vein during injection.
Get emergency medical help right away

For more links on how to manage your symptoms go to https://www.cancercareontario.ca/en/symptom-management.

The information set out in the medication information sheets, regimen information sheets, and symptom management information (for patients) contained in the Drug Formulary (the "Formulary") is intended to be used by health professionals and patients for informational purposes only. The information is not intended to cover all possible uses, directions, precautions, drug interactions or side effects of a certain drug, nor should it be used to indicate that use of a particular drug is safe, appropriate or effective for a given condition.

A patient should always consult a healthcare provider if he/she has any questions regarding the information set out in the Formulary. The information in the Formulary is not intended to act as or replace medical advice and should not be relied upon in any such regard. All uses of the Formulary are subject to clinical judgment and actual prescribing patterns may not follow the information provided in the Formulary.

Last Updated: July 27, 2026