Calvorin Injection

Calcium Leucovorin (10mg/ml)

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Calvorin Injection is used to prevent the harmful effects of methotrexate (anticancer medicine). It is also used to treat overdose of methotrexate.

Written By Dr. Sakshi Jain, MS, BDS,
Reviewed By Dr. Sachin Gupta, MD Pharmacology, MBBS,
Last updated on 25 Nov 2025 | 03:05 PM (IST)

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General Information

Storage

Store below 30°C

Preservative

Methylparaben, Propyl paraben

The content is shown in English

Product introduction

Calvorin Injection is given as a slow injection into veins under the supervision of a doctor. Your doctor will decide what dose is necessary and how often you need to take it. This will depend on what you are being treated for and may change from time to time. You should take it exactly as your doctor has advised. Taking it in the wrong way or taking too much can cause very serious side effects.

Injection site reactions (pain, swelling, redness) are common side effects of this medicine. If these bother you or appear serious, let your doctor know. There may be ways of reducing or preventing them. Regular blood tests are required to check your blood cells and serum methotrexate concentration in blood.

Before taking it, tell your doctor if have seizures, liver, or kidney problems or are taking any medicines to treat infections. Many other medicines can affect, or be affected by, this medicine so let your healthcare team know all medications you are using, especially phenytoin for your seizures. To make sure it is safe for you, let your doctor know if you are pregnant or breastfeeding before taking this medicine.

Uses of Calvorin Injection

Benefits of Calvorin Injection

Prevention of Harmful effects of methotrexate
Calvorin Injection helps protect the body cells against the harmful effects of methotrexate, an anti-cancer medicine. It is a form of vitamin B that is given after 24 hours of methotrexate administration. This makes sure that methotrexate has achieved its anti-cancer effects and also, Calvorin Injection will prevent the other side effects such as anemia.

Side effects of Calvorin Injection

Most side effects do not require any medical attention and disappear as your body adjusts to the medicine. Consult your doctor if they persist or if you’re worried about them

Common side effects of Calvorin

Injection site reactions (pain, swelling, redness)

How to use Calvorin Injection

Your doctor or nurse will give you this medicine. Kindly do not self administer.

How Calvorin Injection works

Calvorin Injection helps protect healthy cells from the side effects of methotrexate, a strong medicine used in cancer and other conditions. Methotrexate can block the action of folic acid, which is essential for cell growth. Calvorin Injection works by supplying the body with a form of folic acid, allowing healthy cells to recover and continue functioning normally without affecting methotrexate's action on diseased cells.

Quick tips

You have been prescribed Calvorin Injection to reduce the side effects of the medicine methotrexate.
Take it 24 hours after taking methotrexate. If taken at the same time, it may counteract the effect of methotrexate.
Inform your doctor if you are also taking certain medications such as phenytoin for your seizures as Calvorin Injection may counteract the antiepileptic effects.
You have been prescribed Calvorin Injection to reduce the side effects of the medicine methotrexate.
Take it 24 hours after taking methotrexate. If taken at the same time, it may counteract the effect of methotrexate.
Inform your doctor if you are also taking certain medications such as phenytoin for your seizures as Calvorin Injection may counteract the antiepileptic effects.
You have been prescribed Calvorin Injection to reduce the side effects of the medicine methotrexate.
Take it 24 hours after taking methotrexate. If taken at the same time, it may counteract the effect of methotrexate.
Inform your doctor if you are also taking certain medications such as phenytoin for your seizures as Calvorin Injection may counteract the antiepileptic effects.

Safety advice

Alcohol

CONSULT YOUR DOCTOR

It is not known whether it is safe to consume alcohol with Calvorin Injection. Please consult your doctor.

Pregnancy

CONSULT YOUR DOCTOR

The safety of Calvorin Injection during pregnancy has not been established. There are no adequate and well-controlled studies in pregnant women, and animal data on reproductive toxicity are insufficient. Your doctor will weigh the benefits and any potential risks before prescribing.

Breast feeding

CONSULT YOUR DOCTOR

Information regarding the use of Calvorin Injection during breastfeeding is not available. Please consult your doctor.

Driving

SAFE

Calvorin Injection does not usually affect your ability to drive.

Kidney

CONSULT YOUR DOCTOR

There is limited data available on the use of Calvorin Injection in patients with kidney disease. Please consult your doctor.

Liver

CONSULT YOUR DOCTOR

There is limited data available on the use of Calvorin Injection in patients with liver disease.

Frequently asked questions

What is Calvorin Injection used for?

Calvorin Injection is used to prevent harmful effects of methotrexate (cancer chemotherapy medication) when methotrexate is used to treat certain types of cancer. Calvorin Injection is also used to treat people who have accidentally received an overdose of methotrexate or similar medications. It is also used for the treatment of megaloblastic anemia due to folic acid deficiency and when oral therapy is not feasible.

What is megaloblastic anemia?

Anemia is a blood disorder in which the number of red blood cells (RBCs) that carry oxygen is lower than usual. As a result, your tissues and organs don’t get enough oxygen. Megaloblastic anemia is a form of anemia characterized by very large red blood cells and a decrease in the number of those cells. Usually, megaloblastic anemia is due to vitamin B12 or folic acid deficiency. How long does it take for Calvorin Injection to work?

How long does it take for Calvorin Injection to work?

Calvorin Injection starts acting on the body within 5 minutes of administration. However, this might vary with respect to dosage, the patient receiving the drug, and response to treatment.

What are some of the laboratory tests conducted before or during the treatment with Calvorin Injection?

Your doctor will prescribe blood tests to check your levels of serum methotrexate concentration (in case of methotrexate chemotherapy or overdose) to determine the optimal dose and duration of treatment with Calvorin Injection. You will also be prescribed a complete blood count to monitor the number of red blood cells (in case of megaloblastic anemia). Along with this, your calcium levels will also be monitored in order to prevent hypercalcemia (excess calcium) since Calvorin Injection contains calcium.

What measures should be taken to ensure the prompt excretion of methotrexate during treatment with Calvorin Injection?

Maintenance of urine output above 2,500 mL/24hr in adults by increasing oral or intravenous fluids 12 hours before and for 36 hours after the end of methotrexate infusion. To monitor alkalinization of urine (this enhances drug excretion) so that the urinary pH is greater than 7.0 before methotrexate infusion. Foods, drinks, and drugs that may increase urinary acidity should be avoided during the therapy. Finally, blood methotrexate concentration should be measured at least 24, 48, and 72 hours after the initiation of the methotrexate infusion.

Fact Box

Chemical Class

Folic acid derivative

Habit Forming

Therapeutic Class

BLOOD RELATED

Action Class

Folic Acid Analogs

References

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Disclaimer

Tata 1mg's sole intention is to ensure that its consumers get information that is expert-reviewed, accurate and trustworthy. However, the information contained herein should NOT be used as a substitute for the advice of a qualified physician. The information provided here is for informational purposes only. This may not cover everything about particular health conditions, lab tests, medicines, all possible side effects, drug interactions, warnings, alerts, etc. Please consult your doctor and discuss all your queries related to any disease or medicine. We intend to support, not replace, the doctor-patient relationship.

Marketer details

Name: Ilmic Health Care Pvt Ltd
Address: Unit No. 101, 1st Floor, 2 Vikas Plaza, Community Center, Rohini Sector 8, New Delhi - 110085, India Send Inquiry

Vendor Details

Country of origin: India

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Calvorin Injection

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General Information

Contains

Salt Synonyms

Marketer

Storage

Preservative

Product introduction

Uses of Calvorin Injection

Benefits of Calvorin Injection

Side effects of Calvorin Injection

How to use Calvorin Injection

How Calvorin Injection works

Quick tips

Safety advice

Alcohol

Pregnancy

Breast feeding

Driving

Kidney

Liver

Frequently asked questions

What is Calvorin Injection used for?

What is megaloblastic anemia?

How long does it take for Calvorin Injection to work?

What are some of the laboratory tests conducted before or during the treatment with Calvorin Injection?

What measures should be taken to ensure the prompt excretion of methotrexate during treatment with Calvorin Injection?

Fact Box

Chemical Class

Habit Forming

Therapeutic Class

Action Class

References

Want to know more

Have issue with the content

Disclaimer

Marketer details

Vendor Details

Lab tests offered by us

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