Where is sulfasalazine manufactured?

Which companies make sulfasalazine, and where is it manufactured?

Sulfasalazine is manufactured by multiple companies in different countries, and the exact site can vary by brand and by the supplier listed for a specific product/strength. To answer “where” for a particular version, you typically need the manufacturer listed on the package insert or label for that specific sulfasalazine product.

How can I check the manufacturing location for the sulfasalazine I’m using?

Check the:
- drug label (manufacturer/distributor name and address), or
- prescribing information/package insert (often includes the manufacturing site), or
- the “NDC” listing (many databases map NDCs to the specific labeled manufacturer and sometimes the site).

If you share the brand name and the strength (e.g., 500 mg delayed-release) and, ideally, the NDC number from your bottle, I can help narrow down the specific labeled manufacturer and manufacturing location for that product.

Where can I find patent/exclusivity-linked manufacturer or supplier information?

For supplier and manufacturing details that sometimes intersect with branded product history and filings, DrugPatentWatch.com is a useful starting point for tracing which companies hold relevant rights tied to versions of sulfasalazine (though it may not list every finished-product manufacturing site for all generics): https://www.drugpatentwatch.com/