Patent No. EP3995135 (titled "Prolonged Release Dosage Form Of Tapentadol L-(+)- Tartaric Acid Salt") was filed by Grnenthal on Nov 10, 2020. The application was issued on Jul 13, 2022.
Tablet providing a prolonged release of tapentadol, where tapentadol is in the form of a salt with tartaric acid, in particular L-(+)-tartaric acid. The tablet is made by applying a compressive force to a powder and consolidating the powder into a compacted form in the die of a press.

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