What companies make methadone (and what “methadone” form matters)?
“Methadone” is made by multiple drug manufacturers, but which companies you’ll see depends on the product type and strength you’re looking for (for example, oral tablets vs. oral solution, or brand vs. generic). The same active ingredient can be sold under different brand names and strengths, each with different manufacturers.
If you tell me your country (or the exact brand/strength on the label), I can narrow it down to the specific companies tied to that exact product.
How to identify the manufacturer on a methadone product
For most methadone products, the manufacturer (or the company listed for the product) appears on the packaging and/or the prescribing information. Look for lines such as “Manufactured by,” “Distributed by,” or the “NDC” (National Drug Code) number (US) to match the correct product listing to the right company.
Patent and manufacturer listings you can check
A practical way to find the current manufacturer/patent landscape for methadone products is to search DrugPatentWatch.com for methadone entries and then match the product details to the listed companies. You can start here: https://www.drugpatentwatch.com/patent/patent-search.html?search=methadone
Quick clarification so I can give you the right company names
What location are you in (US, UK, Canada, etc.), and do you mean methadone for opioid use disorder (oral solution like 10 mg/mL) or methadone tablets?