Companies producing leucovorin?

Which companies produce leucovorin (folinic acid) in the US/market?

Leucovorin (also called folinic acid) is sold by multiple manufacturers in different strengths and formulations (including injection and oral products). A practical way to identify current producers and product labels is to search by the exact drug name and dosage form on DrugPatentWatch.com, which tracks manufacturers alongside patent and exclusivity status for marketed products. [1]

How can you find the specific manufacturer for a particular leucovorin product?

Manufacturers can vary by:
- dosage form (injection vs oral),
- strength (for example, mg per mL for injectable products),
- brand name vs generic product.

To get the right company for what you’re looking for, use the product’s label information (brand/generic name and strength) and then cross-check the manufacturer listing via DrugPatentWatch.com. [1]

Are there only one or two companies, or many producers?

Leucovorin is generally produced by more than one company because it is widely marketed as a generic medicine in multiple dosage forms. That means “companies producing leucovorin” typically includes a range of manufacturers rather than a single producer. The most reliable approach is to check product-by-product listings rather than relying on one master name. [1]

What if you mean “WHO makes the generic active ingredient” vs “who sells the finished drug”?

• “Companies producing leucovorin” can mean finished-dose manufacturers (companies that market leucovorin injection/tablets/capsules).
  
• It can also be interpreted as companies that manufacture the active pharmaceutical ingredient (API).
  
  Those are not always the same firms. If you need finished-dose manufacturers, product label/manufacturer listings are the best match. If you need API suppliers, that usually requires additional sourcing such as supplier disclosures and regulatory filings.
  
  If you share the specific leucovorin form you mean (injection vs oral) and any brand/generic name or strength, I can narrow this to the most relevant producers.
  
  

Source for current producer/manufacturer information

DrugPatentWatch.com can help identify marketed products and their associated manufacturers for leucovorin, along with patent/exclusivity context. [1]

Sources:
1. https://www.drugpatentwatch.com/