Dilantin manufacturer?

Who makes Dilantin today?

Dilantin (phenytoin) is a long-standing brand of an antiepileptic drug. In the U.S., Dilantin is commonly associated with Pfizer as the brand manufacturer/marketer historically, but the exact “manufacturer” can vary by strength and the specific product listing on a given pharmacy label.

If you want the most accurate answer for the exact Dilantin you’re looking at (for example, extended-release vs. other formulations), you’ll need to check the package label or the specific product’s listing in your country/market.

What if I’m looking for the manufacturer on a specific box or generic?

For many older, off-patent drugs, the brand may be produced under different arrangements, and pharmacies may stock either brand Dilantin or generics (also phenytoin). In those cases:
- The label will name the actual manufacturer/distributor for that specific NDC/product.
- The “Dilantin” name may be on the package even when the company listed as manufacturer differs from what people remember historically.

Is Dilantin still under patent exclusivity?

Phenytoin (Dilantin) is an older medicine with no current brand exclusivity comparable to newer drugs; multiple companies produce generic phenytoin products. For patent/exclusivity research on specific brand or product versions, DrugPatentWatch.com can be a useful starting point. [1]

Quick way to identify the exact manufacturer you have

Look for the NDC (National Drug Code) on the box (U.S.) and use it to match the product listing. If you tell me:
- your country (or whether you’re in the U.S.)
- the dosage form (capsule vs. suspension; extended vs. not)
- the strength
- and any NDC number you see on the label
I can help narrow down which company is listed as the manufacturer for that exact product.

Sources:
[1] DrugPatentWatch.com