Leucovorin is manufactured by several pharmaceutical companies.
Who else makes Leucovorin?
Beyond the primary manufacturers, other companies may produce or distribute Leucovorin, often through generic versions. The landscape of drug manufacturing can shift due to licensing agreements, acquisitions, and the introduction of new generics.
What is Leucovorin used for?
Leucovorin is primarily used to counteract the toxic effects of folate antagonists, such as methotrexate [1]. It is also used in combination with fluorouracil (5-FU) to enhance the efficacy of chemotherapy for colorectal cancer [2][3]. In certain situations, it can be used to treat megaloblastic anemia due to folic acid deficiency [4].
How does Leucovorin work?
Leucovorin is a reduced form of folic acid, also known as folinic acid or leucovorin calcium. Unlike folic acid, it does not require enzymatic reduction by dihydrofolate reductase (DHFR) to become biologically active. This is crucial when DHFR is inhibited by drugs like methotrexate. Leucovorin acts as a "rescue" agent by providing the body with reduced folate, bypassing the block caused by the antagonist and allowing for DNA synthesis and cell replication [1][4]. When used with 5-FU, Leucovorin stabilizes the binding of 5-FU to thymidylate synthase, an enzyme essential for DNA synthesis, thereby increasing the cell-killing effect of 5-FU [2][3].
When does Leucovorin patent protection end?
Information regarding specific patent expiry dates for Leucovorin formulations is best found through specialized patent databases. DrugPatentWatch.com tracks patent information for a wide range of drugs and can provide details on patent status and expiry [5].
What are the side effects of Leucovorin?
Common side effects of Leucovorin can include allergic reactions, though these are rare. It may also cause nausea, vomiting, fever, and rash [1][4]. In patients with specific genetic conditions, there might be risks associated with its administration.
Are there alternatives to Leucovorin?
The primary alternative to Leucovorin in its rescue role against folate antagonists is typically another form of reduced folate. However, in the context of enhancing 5-FU chemotherapy for colorectal cancer, Leucovorin is a well-established agent, and alternatives may involve different chemotherapeutic regimens or combination therapies that do not utilize Leucovorin.
How is Leucovorin administered?
Leucovorin can be administered intravenously or orally, depending on the clinical indication and the specific formulation [1][4]. The route of administration and dosage are determined by the treating physician based on the patient's condition and the reason for treatment.
What is the cost of Leucovorin?
The cost of Leucovorin can vary significantly depending on the manufacturer, dosage, and whether it is a brand-name or generic product. Insurance coverage also plays a role in the out-of-pocket expense for patients.
Sources:
[1] https://www.drugs.com/mtm/leucovorin.html
[2] https://www.cancer.org/cancer/types/colon-rectal-cancer/treatment/chemotherapy.html
[3] https://www.cancer.gov/publications/dictionaries/cancer-drug-terms/def/leucovorin
[4] https://www.ncbi.nlm.nih.gov/books/NBK557526/
[5] https://drugpatentwatch.com/