Skip to main content


Generic name: levoleucovorinLEE-voe-LOO-koe-voe-rin ]
Drug class: Antidotes

Medically reviewed by on Jul 3, 2023. Written by Cerner Multum.

What is Khapzory?

Khapzory is used to treat or prevent toxic effects of methotrexate in people who have received methotrexate to treat bone cancer.

Khapzory is also used to treat or prevent toxic effects of methotrexate in people whose bodies do not eliminate methotrexate properly after the drug is metabolized. This medicine may also be used to treat toxic effects of an overdose or methotrexate or certain other medications.

Khapzory is also used in combination chemotherapy with fluorouracil to treat colorectal cancer that has spread to other parts of the body.

Khapzory should not be used to treat anemia that is caused by a lack of vitamin B12.

Khapzory may also be used for purposes not listed in this medication guide.

Khapzory side effects

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Tell your doctor or caregivers at once if you have:

Common side effects of Khapzory may include:

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.


Follow all directions on your medicine label and package. Tell each of your healthcare providers about all your medical conditions, allergies, and all medicines you use.

Before taking this medicine

You should not be treated with Khapzory if you are allergic to Khapzory, folic acid, or folinic acid.

If possible, before you receive Khapzory, tell your doctor or caregivers if you have:

Tell your doctor if you are pregnant or breastfeeding.

How is Khapzory given?

Khapzory is given as an infusion into a vein. A healthcare provider will give you this injection.

For use with methotrexate, Khapzory is usually given every 3 to 6 hours.

For colorectal cancer, Khapzory is usually given daily as a 5-day treatment, repeated every 4 to 5 weeks.

After treatment with Khapzory, you will be watched to make sure this medicine has been effective.

You will need frequent medical tests to help your doctor determine how long to treat you with Khapzory.

What happens if I miss a dose?

If Khapzory is given by a healthcare professional in an clinical setting, you are not likely to miss a dose.

If you are receiving Khapzory daily in 4-week treatment cycles, call your doctor for instructions if you miss an appointment for your scheduled injection.

What happens if I overdose?

Seek emergency medical attention or call the Poison Help line at 1-800-222-1222.

What should I avoid while receiving Khapzory?

Follow your doctor's instructions about any restrictions on food, beverages, or activity.

What other drugs will affect Khapzory?

Tell your doctor about all your other medicines, especially:

This list is not complete. Other drugs may affect Khapzory, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.

Further information

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.