Introduction
Calcium folinate (also known as folinic acid and leucovorin) is a medication often used to reduce the negative side effects of certain cancer treatments. It works by restoring the ability of normal cells to repair themselves, thus protecting them from the harmful actions of certain drugs.
Uses
Calcium folinate is mainly used to reduce the toxic effects of chemotherapy treatments. It may also be used to treat megaloblastic anemia caused by certain medications and to treat some types of poisoning.
Mechanism of Action
Calcium folinate works by supplying additional folate, which is a B-complex vitamin. The additional folate helps to restore the ability of normal cells to repair themselves, thus protecting them from the toxic effects of certain chemotherapy drugs.
How Long Does It Take to Work?
The time it takes for calcium folinate to begin working depends on the purpose of the medication and the dose being taken. It typically takes about 30 minutes for the effects of a single dose to begin, but in some cases it can take up to 4 hours.
Absorption
Calcium folinate is absorbed rapidly when given intravenously (IV), with peak levels achieved within 30-60 minutes. However, when taken orally, it is not as well absorbed and has a slower onset of action.
Route of Elimination
The majority of calcium folinate is eliminated through the kidneys, with only a small amount being eliminated via the bile.
Dosage
Calcium folinate is available in several different forms, including tablets, oral solution, and injection. The dosage required will vary depending on the purpose of the medication and the patient’s age. For example, a 10 mg dose of calcium folinate is usually recommended as part of a chemotherapy regimen.
Administration
Calcium folinate is typically administered as an injection into the vein (IV). It can also be taken orally as a tablet or liquid solution.
Side Effects
The most common side effects of calcium folinate are nausea, vomiting, headache, and diarrhea. Other potential side effects include rash, fever, chills, and joint pain.
Toxicity
Calcium folinate is generally well-tolerated, and serious side effects are rare. However, if too much of the medication is taken, it can cause toxicity in the form of heart palpitations, dizziness, confusion, and seizures.
Precautions
Calcium folinate should be used with caution in people with certain medical conditions, such as renal or hepatic impairment, and in those who are taking other medications that may interact with calcium folinate.
Interactions
Calcium folinate can interact with other medications, such as antacids, anticonvulsants, and oral hypoglycemics. It can also interact with some herbal and dietary supplements.
Disease Interactions
Calcium folinate may not be suitable for those with certain medical conditions, such as kidney or liver disease. It can also interact with some medications used to treat cancer.
Drug Interactions
Calcium folinate can interact with other medications, including antacids, anticonvulsants, and oral hypoglycemics.
Food Interactions
It is important to avoid eating foods that are high in folate while taking calcium folinate, as this can increase the risk of side effects.
Pregnancy Use
Calcium folinate should be used with caution during pregnancy, as it can interact with medications used to treat cancer.
Lactation Use
There is limited information available regarding the use of calcium folinate during breastfeeding. It is best to avoid taking this medication while breastfeeding.
Acute Overdose
If an overdose of calcium folinate is suspected, seek medical attention immediately. Symptoms of overdose may include heart palpitations, confusion, dizziness, and seizures.
Contraindication
Calcium folinate should not be used in people with certain medical conditions, such as renal or hepatic impairment, or in those who are taking medications that may interact with the medication.
Use Directions
Calcium folinate should be taken as prescribed by a doctor. This medication is usually administered as an injection, but it can also be taken orally as a tablet or liquid solution.
Storage Conditions
Calcium folinate should be stored at room temperature away from moisture and heat. It should be kept out of the reach of children.
Volume of Distribution
Calcium folinate has a volume of distribution of 7.3-13.2 L/kg.
Half Life
The elimination half-life of calcium folinate is 1.7-1.9 hours.
Clearance
The clearance of calcium folinate is 1.4-2.4 L/h/kg.
