Drug
Phentermine clinical trials
Also written Adipex-P.
- studies test it
- 35
- open now
- 5
- in phase 3
- 4
- first study started
- 2006
Keep track of what changes. Save the Phentermine studies recruiting or about to start, and get an email each week — studies that open, close, add sites or post results.
Watch these studiesHow studies write it
Studies that test it under each name
Combined with it in one product
Studies by the year they started
35 studies that test it; most in 2007 (5)
| Year | Studies |
|---|---|
| 2006 | 1 |
| 2007 | 5 |
| 2008 | 5 |
| 2009 | 1 |
| 2011 | 1 |
| 2012 | 1 |
| 2013 | 1 |
| 2014 | 2 |
| 2016 | 2 |
| 2018 | 1 |
| 2019 | 1 |
| 2020 | 3 |
| 2021 | 2 |
| 2022 | 3 |
| 2023 | 1 |
| 2024 | 1 |
| 2025 | 1 |
| 2026 | 3 |
By phase
A phase 1/2 study counts in both.
- Phase 1
- 3
- Phase 2
- 13
- Phase 3
- 4
- Phase 4
- 14
- No phase
- 2
What it is tested for
Each study’s main condition, where its own words name it.
- Obesity
- 12
Who runs them
Industry 15 · Other 20
VIVUS LLC (12) · The Cleveland Clinic (3) · Wake Forest University Health Sciences (3) · University of Pennsylvania (2) · OSCAR MANUEL TORRES FALCON (1) · University of Florida (1) · University of Colorado, Denver (1) · AdventHealth Translational Research Institute (1)
Often tested with
Tested in the same studies.
Topiramate (22) · Semaglutide (2) · Liraglutide (2) · Naltrexone (2) · Bupropion (2) · Tirzepatide (1) · Bupropion hydrochloride, naltrexone hydrochoride drug combination (1) · Lorcaserin (1)
Studies
Open first, then newest update. How each study uses Phentermine is read from its arms, and is right about nine times in ten.
Testing it · 35
- Pharmacotherapy in Conjunction With Lifestyle Counseling for Management of Weight Regain After Bariatric SurgeryRecruitingPhase 4University of California, IrvineNCT05975580Written as Phentermine
- Phentermine's Impact on Treatment in TeensRecruitingPhase 2Russell McCulloh, MDNCT07282340Written as Phentermine
- Obesity Treatment With Phentermine-Topiramate ER in AYA Surviving Leukemia and LymphomaNot yet recruitingPhase 2St. Jude Children's Research HospitalNCT07790913Written as Phentermine/Topiramate ER
- Individualized Pharmacological Approach to Obesity in Patients With Bipolar DisorderRecruitingPhase 4Mayo ClinicNCT07213466Written as Phentermine-Topiramate
- Pharmacologic Weight Loss as Adjunct Therapy for Ulcerative Colitis in Obese PatientsRecruitingPhase 2University of California, San DiegoNCT04721873Written as Phentermine-Topiramate
- Intermittent Phentermine for Obesity and Body CompositionCompletedPhase 4OSCAR MANUEL TORRES FALCONNCT07870668Written as Phentermine 15 MG
- Sequential Therapy Anti-obesitY Medication With Muscle Preservation for Weight Loss and MaintEnance: A PragmAtic Randomized CoNtrolled Trial (STAY-LEAN Trial)Active, not recruitingPhase 4The Cleveland ClinicNCT06854614Written as Phentermine-Topiramate
- Phentermine/Topiramate for Uric Acid StonesCompletedPhase 2University of FloridaNCT04621929Written as Phentermine / Topiramate Oral Product
- Long-term Effectiveness of the Antiobesity Medication PhentermineActive, not recruitingPhase 4Wake Forest University Health SciencesNCT05176626Written as Phentermine Hydrochloride 8 MG
- Medications After Adolescent Bariatric SurgeryWithdrawnPhase 2Janey PrattNCT04572217Written as Phentermine
- Adjunct Phentermine + Topiramate After Bariatric Surgery in 12-24 Year OldsCompletedPhase 2University of Colorado, DenverNCT04095104Written as Phentermine
- Use of Medication to Improve Weight Loss in Suboptimal Early Responders to Behavioral TreatmentCompletedPhase 4University of PennsylvaniaNCT03779048Written as Phentermine 15 MG
- EMI-EHP Weight Management and Type 2 Diabetes Pragmatic TrialTerminatedPhase 4The Cleveland ClinicNCT04531176Written as Phentermine / Topiramate Extended Release Oral Capsule
- A Study of VI-0521 on Ambulatory Blood Pressure (ABPM) in Overweight or Obese SubjectsCompletedPhase 4VIVUS LLCNCT05215418Written as VI-0521
- Comparing a Virtual vs. Face to Face Weight Management Program Using Phentermine for Patients With Overweight or ObesityCompletedPhase 4The Cleveland ClinicNCT04614545Written as Phentermine 37.5 Mg
- A Pharmacokinetic Study Comparing VI-0521 With Placebo in Obese AdolescentsCompletedPhase 4VIVUS LLCNCT02714062Written as VI-0521 Mid Dose
- Phentermine/Gastric Band Weight Loss StudyWithdrawnNot applicableWake Forest University Health SciencesNCT00771654Written as Phentermine
- Effect of Caloric Restriction on Fat Oxidation in Obese Men and Women (Magellan II)CompletedNot applicableAdventHealth Translational Research InstituteNCT01616082Written as Phentermine
- Effectiveness and Tolerability of Phentermine in Patients Under Bariatric SurgeryCompletedPhase 4Hospital Juarez de MexicoNCT03849729Written as Phentermine
- A Multicenter, Double-blind, Randomized, Parallel-group, Pilot Study of 12-week Duration to Assess the Short-term Safety and Tolerability of Lorcaserin Plus Two Doses of Immediate-Release Phentermine-HCl Compared With Lorcaserin Alone in Overweight and Obese AdultsCompletedPhase 4Eisai Inc.NCT01987427Written as lorcaserin + phentermine-HCl
See all 35 studies that test Phentermine →
Given in every arm · 4 — Phentermine is usual care beside what is tested
- Individualized Obesity PharmacotherapyCompletedPhase 3Mayo ClinicNCT03374956Written as Phentermine-Topiramate
- Topiramate-Phentermine Combinations for Cocaine DependenceCompletedPhase 1University of KentuckyNCT02239913Written as Phentermine
- A Study to Evaluate How VI-0521 Affect Psychomotor Performance in Healthy Overweight and Obese Subjects.CompletedPhase 2VIVUS LLCNCT00806260Written as VI-0521
- Study in Healthy Recreational Polydrug Users to Measure the Abuse Potential of TC-5214WithdrawnPhase 1AstraZenecaNCT01500018Written as Phentermine
As the comparator · 6 — what is tested is compared with Phentermine
- A Research Study Comparing Wegovy to Other Weight Management Drugs in People Living With Obesity in AmericaCompletedPhase 4Novo Nordisk A/SNCT05579249Written as Phentermine/Topiramate
- A Study to Evaluate Abuse Potential of IstradefyllineCompletedPhase 1Kyowa Kirin Co., Ltd.NCT02609477Written as Phentermine 45 mg
- Individualized Obesity PharmacotherapyCompletedPhase 3Mayo ClinicNCT03374956Written as Phentermine-Topiramate
- EQW, DAPA, EQW/DAPA, DAPA/MET ER and PHEN/TPM ER in Obese Women With PolycysticOvary Syndrome (PCOS)CompletedPhase 3Woman'sNCT02635386Written as Phentermine /Topiramate (PHEN/ TPM) ER
- Determination the Abuse Potential of Pitolisant in Healthy, Non-Dependent Recreational Stimulant UsersCompletedPhase 1BioprojetNCT03152123Written as Phentermine
- The Effect of Phentermine and B12 on Weight Loss Among Obese PatientsCompletedEarly Phase 1Dr. Michael LangNCT01719185Written as Phentermine
Codes
What other systems call Phentermine · ClinicalTrials.gg INT007998
- MeSH (NLM) D010645PhentermineConfirmed ClinicalTrials.gov, NLM, Wikidata
- UNII (FDA) C045TQL4WPPHENTERMINEConfirmed FDA, NLM, Wikidata
- RxNorm 8152Confirmed FDA, Wikidata
- Wikidata Q418157phentermineConfirmed FDA, NLM, Wikidata
- NCI Thesaurus C61890PhentermineOne source FDA
- DrugBank DB00191One source Wikidata
| System | Code | Name there | Checked by |
|---|---|---|---|
| MeSH (NLM) | D010645 | Phentermine | Confirmed ClinicalTrials.gov, NLM, Wikidata |
| UNII (FDA) | C045TQL4WP | PHENTERMINE | Confirmed FDA, NLM, Wikidata |
| RxNorm | 8152 | — | Confirmed FDA, Wikidata |
| Wikidata | Q418157 | phentermine | Confirmed FDA, NLM, Wikidata |
| NCI Thesaurus | C61890 | Phentermine | One source FDA |
| DrugBank | DB00191 | — | One source Wikidata |
Also registered as phentermine hydrochloride (UNII 0K2I505OTV · RxNorm 82078).
“Confirmed” means two independent publishers link the code to this drug; “one source”, one does and its name agrees.