Isoflurane Patent Expiration

Isoflurane was first introduced by Baxter Healthcare Corp in its drug Forane on Approved Prior to Jan 1, 1982. 7 different companies have introduced drugs containing Isoflurane.


About Veterinary Isoflurane

Isoflurane is used in drugs marketed by 5 different companies: Piramal Pharma Ltd, Baxter Healthcare Corp, Parnell Technologies Pty Ltd, Dechra Veterinary Products Llc, Zoetis Inc.

Other drugs containing Isoflurane are: Isospire , Isoflo , Attane , Anirane

Isoflurane's Family Patents

Family Patents

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Clinical Trials

Recent Clinical Trials on Isoflurane:

Sometimes companies keep conducting clinical trials even after the drug's approval to discover new formulations, methods of use, or new treatment indications, so they could file for additional patents or receive regulatory exclusivity extensions, such as pediatric exclusivity, potentially delaying generic competition. Based on these recent clinical trials, generic companies need to consider the potential for new intellectual property or regulatory hurdles. These strategic moves by the drug owner might delay generic substitution or lead to additional sales of the brand drug, even after patent expiry.



Isoflurane Generic API Manufacturers

Several generic applications have been filed for Isoflurane. The first generic version for Isoflurane was by Hospira Inc and was approved on Jan 25, 1993. And the latest generic version is by Shandong New Time Pharmaceutical Co Ltd and was approved on Nov 4, 2025.

Given below is the list of companies who have filed for Isoflurane generic, along with the locations of their manufacturing plants worldwide.