Megace Es Patent Expiration

Megace Es is a drug owned by Endo Operations Ltd. It is protected by 6 US drug patents filed from 2013 to 2015 out of which all have expired. Based on its patents and exclusivities, its generic launch date is estimated to be Apr 22, 2024. Details of Megace Es's patents and their expiration are given in the table below.

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Drug Patent Number Drug Patent Title Drug Patent Expiry Status
These drug patents focus on the other aspects of the drug like dosage, mode of administration (oral, tablet, capsules, liquids etc).
US7101576 Nanoparticulate megestrol formulations
Apr, 2024

(2 years ago)

Expired
US9101540 Nanoparticulate megestrol formulations
Apr, 2024

(2 years ago)

Expired
US9040088 Nanoparticulate megestrol formulations
Apr, 2024

(2 years ago)

Expired
US9101549 Nanoparticulate megestrol formulations
Apr, 2024

(2 years ago)

Expired
US9107827 Nanoparticulate megestrol formulations
Apr, 2024

(2 years ago)

Expired
US6592903 Nanoparticulate dispersions comprising a synergistic combination of a polymeric surface stabilizer and dioctyl sodium sulfosuccinate
Sep, 2020

(6 years ago)

Expired


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 Megace Es's patents.

Given below is the list of recent legal activities going on the following patents of Megace Es.

Activity Date Patent Number
Patent litigations
Payment of Maintenance Fee, 8th Year, Large Entity 20 Feb, 2023 US9107827
Payment of Maintenance Fee, 8th Year, Large Entity 13 Feb, 2023 US9101540 (Litigated)
Payment of Maintenance Fee, 8th Year, Large Entity 13 Feb, 2023 US9101549
Payment of Maintenance Fee, 8th Year, Large Entity 28 Nov, 2022 US9040088
Payment of Maintenance Fee, 4th Year, Large Entity 18 Feb, 2019 US9107827
Payment of Maintenance Fee, 4th Year, Large Entity 11 Feb, 2019 US9101540 (Litigated)
Payment of Maintenance Fee, 4th Year, Large Entity 11 Feb, 2019 US9101549
Payment of Maintenance Fee, 4th Year, Large Entity 26 Nov, 2018 US9040088
Payment of Maintenance Fee, 12th Year, Large Entity 05 Mar, 2018 US7101576 (Litigated)
Application ready for PDX access by participating foreign offices 31 Aug, 2015 US9040088

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US patents provide insights into the exclusivity only within the United States, but Megace Es is protected by patents in multiple countries. Understanding the full scope of patent protection is crucial in strategizing market entry. By looking at the broader patent landscape, you can identify markets with weaker patent protection which could be ideal generic entry points. The following section offers details on Megace Es's family patents as well as insights into ongoing legal events on those patents.

Megace Es's Family Patents

Megace Es has patent protection in a total of 18 countries. It's US patent count contributes only to 40.0% of its total global patent coverage. 9 countries have all of their patents expired or invalidated which has opened up potential generic launch opportunities in these countries. Click below to unlock the full patent family tree for Megace Es.

Family Patents

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Clinical Trials

Recent Clinical Trials on Megace Es:

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.

Title Lead Sponsor Collaborators Status Phases
Clinical Trials
Megestrol Acetate for Fatigue Management in T-DXd Treated Breast Cancer Sun Yat-sen University NA RECRUITING
(Aug 1, 2026)
PHASE3
Olanzapine Versus Megestrol Acetate for the Treatment of Loss of Appetite Among Advanced Cancer Patients Alliance for Clinical Trials in Oncology NA ACTIVE NOT RECRUITING
(Jul 1, 2026)
PHASE3
Testing the Addition of the AKT Inhibitor, Ipatasertib, to Treatment With the Hormonal Agent Megestrol Acetate for Recurrent or Metastatic Endometrial Cancers National Cancer Institute (NCI) NA ACTIVE NOT RECRUITING
(Jun 1, 2026)
PHASE1, PHASE2
Progestins for the Treatment of Endometrial Cancer or Precancers of the Uterus Before Surgery, The Pro-Window Trial New Mexico Cancer Research Alliance NA RECRUITING
(Jun 1, 2026)
PHASE2
Megestrol Acetate With or Without Pterostilbene in Treating Patients With Endometrial Cancer Undergoing Hysterectomy City of Hope Medical Center NA ACTIVE NOT RECRUITING
(May 1, 2026)
PHASE2
A Clinical Study of Nanocrystalline Megestrol Acetate in Concurrent Chemoradiotherapy for Locally Advanced Cervical Cancer Second Xiangya Hospital of Central South University NA RECRUITING
(Apr 1, 2026)
PHASE1
Nanocrystalline Megestrol Acetate Versus Placebo for Anorexia in Patients With Unresectable Hepatocellular Carcinoma Receiving TACE Combined With Targeted and Immunotherapy Nanfang Hospital, Southern Medical University NA NOT YET RECRUITING
(Apr 1, 2026)
PHASE2
Megestrol Acetate for First-Line Treatment of Malnourished Non-Small Cell Lung Cancer Hunan Province Tumor Hospital NA NOT YET RECRUITING
(Mar 1, 2026)
PHASE3




Generic Launch

Generic Release Date:

Megace Es's generic launch date based on the expiry of its last outstanding patent is estimated to be Apr 22, 2024 (This date is subject to change depending upon the patent filing activities by the drug owner or exclusivity additions to its drug application)

Megace Es Generic API suppliers:

Megestrol Acetate is the generic name for the brand Megace Es. 10 different companies have already filed for the generic of Megace Es, with Hikma having the maximum number of approved applications. Check out the entire list of companies who have already received approval for Megace Es's generic

How can I launch a generic of Megace Es before its drug patent expiration? :

You can seek FDA approval to launch a generic drug before the expiration of Megace Es's patents related by providing a 'paragraph IV certification' in your application, which states that the patent submitted by the Megace Es's sponsor is invalid, unenforceable, or will not be infringed by your generic product.

Given below are the details of the already filed Para IV certificates on Megace Es -

Strength Submission Date Expiration Date of Last Qualifying Patent 180-Day Status First Applicant Approval Generic Competition Status
25 mg / 5 mL
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27 Apr, 2011 22 Apr, 2024 Eligible 27 Aug, 2014 Less






About Megace Es

Megace Es is a drug owned by Endo Operations Ltd. It is used for treating anorexia, cachexia, or unexplained significant weight loss in AIDS patients. Megace Es uses Megestrol Acetate as an active ingredient. Megace Es was launched by Endo Operations in 2005.

Approval Date:

Megace Es was approved by FDA for market use on 05 July, 2005.

Active Ingredient:

Megace Es uses Megestrol Acetate as the active ingredient. Check out other Drugs and Companies using Megestrol Acetate ingredient

Treatment:

Megace Es is used for treating anorexia, cachexia, or unexplained significant weight loss in AIDS patients.

Dosage:

Megace Es is available in suspension form for oral use. Given below is detailed information on Dosage -

Strength Dosage Form Availability Application Pathway
125MG/ML SUSPENSION Discontinued ORAL