Trazodone is no longer produced by a single company – it’s manufactured by a number of pharmaceutical firms around the world, both under the original brand name and as generics. Here’s a quick snapshot of where you’ll typically find trazodone on the production map:
| Manufacturer |
Country / Region |
Notes |
| Eli Lilly & Co. (original brand: Trazodone HCL |
United States |
The first company to bring trazodone to market. Their facilities are GMP‑certified and they continue to produce the branded formulation, though the volume has shrunk as generics dominate the market. |
| Teva Pharmaceuticals |
Israel/US (and global distribution) |
Teva is a major generic producer of trazodone in the U.S. and Canada, and it also supplies the drug to other countries. |
| Sun Pharma |
India |
One of India’s largest generic manufacturers, Sun produces trazodone for both the domestic Indian market and for export to the U.S., Canada, and Europe. |
| Dr. Reddy’s Laboratories |
India |
Another big Indian generic manufacturer, Dr. Reddy’s also produces trazodone for export. |
| Mylan (now Viatris) |
USA/India |
Mylan’s generic line (often sold as “Trazodone HCL”) is widely available in the U.S. and in many other markets. |
| AstraZeneca |
UK |
While not a primary producer of trazodone, AstraZeneca has historically held some licensing and manufacturing rights in certain regions. |
| Hetero Drugs |
India |
Known for producing a range of CNS‑active drugs, including generic trazodone. |
| Zein Pharmaceuticals |
China |
Produces trazodone for the Chinese domestic market and for export to nearby Asian countries. |
How it’s made
All of these manufacturers use the same core synthetic route:
- Base synthesis – The trazodone core (1‑[2‑(4‑chlorophenyl)-1H‑imidazol‑1‑yl]‑3‑(piperidin‑4‑yl)‑1‑H‑indol‑4‑one) is created via a series of Friedel–Crafts acylation, reductive amination, and cyclization steps.
- Salt formation – The hydrochloride salt is produced by reacting the base with hydrochloric acid, which improves the drug’s solubility and stability.
- Formulation – The final tablet (usually 50 mg, 100 mg, or 200 mg) is formulated with inert excipients, coated for ease of swallowing, and then packed in GMP‑certified facilities.
Because trazodone is a well‑studied, generic‑friendly molecule, many manufacturers can produce it under the same quality standards. They all adhere to FDA (or equivalent regulatory authority) guidelines for purity, potency, and stability.
Where you can get it
In most countries, you’ll encounter trazodone as a generic tablet sold by one of the firms above. In the United States, for example, you’ll see it under brand names like Trazodone HCL (Eli Lilly) or as generic tablets from Teva, Mylan, Sun Pharma, Dr. Reddy’s, and others. In India, it’s widely available as a generic from companies like Sun Pharma, Hetero, and Teva, among others.
Bottom line: Trazodone is produced in a handful of major GMP‑certified facilities worldwide, mainly in the U.S., India, Israel, and China. The exact manufacturer you’ll encounter depends on your country’s regulatory approvals and the pharmacy you visit.