Phentermine Hydrochloride; Topiramate Patent Expiration

Phentermine Hydrochloride; Topiramate is used for managing weight in individuals with obesity or overweight-related comorbidities. It was first introduced by Vivus Llc in its drug Qsymia on Jul 17, 2012. 2 different companies have introduced drugs containing Phentermine Hydrochloride; Topiramate.


Phentermine Hydrochloride; Topiramate Patents

Given below is the list of patents protecting Phentermine Hydrochloride; Topiramate, along with the drug name that holds that patent and the company name owning that drug.

Drug Used in Drug Patent Number Drug Patent Title Drug Patent Expiry Drug Owner
Qsymia US8580299 Escalating dosing regimen for effecting weight loss and treating obesity Jun 14, 2029 Vivus Llc
Qsymia US8580298 Low dose topiramate/phentermine composition and methods of use thereof May 15, 2029 Vivus Llc
Qsymia US8895057 Escalating dosing regimen for effecting weight loss and treating obesity Jun 09, 2028 Vivus Llc
Qsymia US8895058 Low dose topiramate/phentermine composition and methods of use thereof Jun 09, 2028 Vivus Llc
Qsymia US9011905 Low dose topiramate/phentermine composition and methods of use thereof Jun 09, 2028 Vivus Llc
Qsymia US9011906 Escalating dosing regimen for effecting weight loss and treating obesity Jun 09, 2028 Vivus Llc
Qsymia US7056890 Combination therapy for effecting weight loss and treating obesity Jun 14, 2020

(Expired)

Vivus Llc
Qsymia US7553818 Combination therapy for effecting weight loss and treating obesity Jun 14, 2020

(Expired)

Vivus Llc
Qsymia US7659256 Combination therapy for effecting weight loss and treating obesity Jun 14, 2020

(Expired)

Vivus Llc
Qsymia US7674776 Combination therapy for effecting weight loss and treating obesity Jun 14, 2020

(Expired)

Vivus Llc
Qsymia US6071537 Anticonvulsant derivatives useful in treating obesity Jun 23, 2017

(Expired)

Vivus Llc



A patent's expiry date may change depending upon legal activities going on that patent. Critical activities like abandoning of a patent, term extension of a patent or amendment of its claims can increase or decrease the life of a patent hence affecting its expiry date and in turn affecting the generic launch date of that drug. Tracking these ongoing activities on a patent application helps to keep an eye on the latest developments in the patent process of the drug which can give an idea of how early a drug's generic could be available. The next section provides a list of recent legal activities on Phentermine Hydrochloride; Topiramate's patents.

Given below is the list recent legal activities going on the following patents of Phentermine Hydrochloride; Topiramate.

Activity Date Patent Number
Patent litigations
Payment of Maintenance Fee, 8th Year, Large Entity 05 Oct, 2022 US9011905(Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 05 Oct, 2022 US9011906(Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 11 May, 2022 US8895058(Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 11 May, 2022 US8895057(Litigated)
Expire Patent 11 Apr, 2022 US7674776(Litigated)
Maintenance Fee Reminder Mailed 25 Oct, 2021 US7674776(Litigated)
Expire Patent 02 Aug, 2021 US7553818(Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 28 Apr, 2021 US8580299(Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 28 Apr, 2021 US8580298(Litigated)
Maintenance Fee Reminder Mailed 15 Feb, 2021 US7553818(Litigated)


Phentermine Hydrochloride; Topiramate's Family Patents

Family Patents

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Phentermine Hydrochloride; Topiramate Generic API Manufacturers

Several generic applications have been filed for Phentermine Hydrochloride; Topiramate.

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


1. ACTAVIS LABS FL INC

Actavis Laboratories Fl Inc has filed for 4 different strengths of generic version for Phentermine Hydrochloride; Topiramate. All of these versions come by the name PHENTERMINE HYDROCHLORIDE AND TOPIRAMATE. Given below are the details of the strengths of this generic introduced by Actavis Labs Fl Inc.

Strength Dosage Form Availability Application Pathway TE code Launch Date
EQ 3.75MG BASE; 23MG capsule, extended release Prescription ORAL AB Jun 25, 2024
EQ 7.5MG BASE; 46MG capsule, extended release Prescription ORAL AB Jun 25, 2024
EQ 11.25MG BASE; 69MG capsule, extended release Prescription ORAL AB Jun 25, 2024
EQ 15MG BASE; 92MG capsule, extended release Prescription ORAL AB Jun 25, 2024