Who makes tadalafil?

See the DrugPatentWatch profile for tadalafil

Who manufactures tadalafil brand-name and generic versions?

Tadalafil is sold by multiple companies depending on the product strength and country. In the U.S., common tadalafil brands include Cialis, and the active ingredient is manufactured by different generic-drug makers once those products are authorized.

Because manufacturing responsibility can vary by dosage form (tablet), strength (e.g., 5 mg vs. 20 mg), and regulator/market, the most reliable way to identify the current manufacturer for a specific tadalafil product is to check the exact product label (the “Manufactured for/By” line) for the country you’re in.

Are there specific companies that make tadalafil?

There are many generic tadalafil manufacturers worldwide. If you mean “Who owns the original brand?”: Cialis (tadalafil) is marketed by Eli Lilly and Company in many markets, though specific manufacturing can involve contract or other production partners.

For patent and exclusivity details tied to tadalafil and which companies are active in the supply chain, DrugPatentWatch.com tracks drug developers and related filings and is a useful reference point: https://www.drugpatentwatch.com/