Long-term Effectiveness of the Antiobesity Medication Phentermine
Public ClinicalTrials.gov record NCT05176626. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
The purpose of this research study is to understand the long-term effects of the drug phentermine on weight, blood pressure, other health outcomes, and safety. Phentermine has been approved by the US Food and Drug Administration (FDA) for weight management since 1959, but it has not been approved for long-term use (i.e., treatment lasting more than 12 weeks). This trial is designed to learn about the long-term effects of phentermine for up to 2 years because obesity is a chronic disease and expert guidelines recommend long-term use of anti-obesity medications as one treatment option.
Study identification
- NCT ID
- NCT05176626
- Recruitment status
- Active, not recruiting
- Study type
- Interventional
- Phase
- Phase 4
- Enrollment
- 870 participants
Conditions and interventions
Conditions
Interventions
- Online Lifestyle Behavioral Therapy Behavioral
- Phentermine Hydrochloride 8 MG Drug
Behavioral · Drug
Eligibility (public fields only)
- Age range
- 18 Years to 70 Years
- Sex
- All
- Healthy volunteers
- Healthy volunteers not accepted
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jun 29, 2022
- Primary completion
- Dec 30, 2026
- Completion
- Dec 30, 2026
- Last update posted
- Mar 30, 2026
2022 – 2026
United States locations
- U.S. sites
- 4
- U.S. states
- 4
- U.S. cities
- 4
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| Kaiser Permanente Southern California | Los Angeles | California | 90034 | — |
| HealthPartners Institute | Saint Louis Park | Minnesota | 55416 | — |
| Atrium Health Wake Forest Baptist Weight Management Center | Winston-Salem | North Carolina | 27104 | — |
| UT Center for Obesity Medicine and Metabolic Performance | Bellaire | Texas | 77401 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT05176626, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Mar 30, 2026 · Synced Sep 1, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT05176626 live on ClinicalTrials.gov.