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Tapered Versus Abrupt Discontinuation of Semaglutide After Treatment of Recurrent Weight Gain or Suboptimal Response Following Metabolic and Bariatric Surgery
Sponsor: General Committee of Teaching Hospitals and Institutes, Egypt
Summary
Every course of obesity pharmacotherapy ends. Cost, supply, pregnancy plans, side effects, or the patient's own wish. In Egypt, cost alone makes discontinuation the rule, not the exception. Yet the entire evidence base describes what happens when the drug stops, and none of it tests how to stop. Abrupt withdrawal fails predictably. One year after stopping semaglutide, STEP 1 extension participants had regained two thirds of their lost weight. SURMOUNT-4 showed the same pattern after tirzepatide withdrawal, and meta-analysis confirms it across agents. After MBS specifically, stopping GLP-1 therapy is likewise followed by regain. The guidelines say: do not stop at all. The 2026 ADA and Obesity Association Standards strongly recommend continuing medication through maintenance, and the 2024 IFSO consensus agrees that when medication is needed to hold the benefit after MBS, ongoing treatment is probably necessary, while stating, at 94% agreement, that intermittent therapy and dose-reduction strategies require research. Our patients cannot follow the first recommendation. Cost decides for them. This trial is the research the second sentence asks for: the evidence for the moment when continuing is not an option. Clinicians already taper, on no evidence. A 2025 expert commentary describes 8-to-12-week dose reductions in routine practice and states plainly that the approach is anecdotal and untested (Obesity and Endocrinology 2025). Practice has run ahead of the trial. The general-population trial now exists, and we cite it rather than duplicate it. The REST trial has registered exactly this comparison, gradual 16-week dose reduction versus abrupt cessation, in non-surgical patients with obesity. No such trial exists after MBS.
Official title: Tapered Versus Abrupt Discontinuation of Semaglutide After Treatment of Recurrent Weight Gain or Suboptimal Response Following Metabolic and Bariatric Surgery: a Randomized, Double-blind Trial
Key Details
Gender
All
Age Range
18 Years - 65 Years
Study Type
INTERVENTIONAL
Enrollment
100
Start Date
2026-10
Completion Date
2028-04
Last Updated
2026-10-05
Healthy Volunteers
No
Conditions
Interventions
Semaglutide weekly injection
Active pens at 1.7 mg for 4 weeks, then 1.0, 0.5, and 0.25 mg for 4 weeks each; injections stop at week 16. Maintenance program throughout: dietitian visits at months 0, 1, 2, 4, and then every 2 months; protein maintained at 60-80 g/day (1.0-1.5 g/kg ideal body weight, ERAS guidance); 150 minutes of weekly activity plus resistance training twice weekly; wrist accelerometer worn continuously. Restart rule: after month 6, open-label pharmacotherapy may be restarted only if the Delphi recurrence criteria are met; every restart is recorded and the patient stays in follow-up. The primary analysis is treatment-policy; a hypothetical estimand ignoring restart is a supporting analysis.
Placebo
Matched placebo pens on the identical schedule from week 0; injections stop at week 16. Maintenance program throughout: dietitian visits at months 0, 1, 2, 4, and then every 2 months; protein maintained at 60-80 g/day (1.0-1.5 g/kg ideal body weight, ERAS guidance); 150 minutes of weekly activity plus resistance training twice weekly; wrist accelerometer worn continuously. Restart rule: after month 6, open-label pharmacotherapy may be restarted only if the Delphi recurrence criteria are met; every restart is recorded and the patient stays in follow-up. The primary analysis is treatment-policy; a hypothetical estimand ignoring restart is a supporting analysis.
Locations (1)
The surgical department of Medical Research Institute Hospital, Alexandria University
Alexandria, Egypt