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Real-world Effectiveness and Dosing Patterns of Tirzepatide in People With Obesity

Real-world Effectiveness and Dosing Patterns of Tirzepatide: A Multicentre Retrospective Observational Study in the Netherlands

Status
Not yet recruiting
Phases
Unknown
Study type
Observational
Source
ClinicalTrials.gov
Registry ID
NCT07504172
Acronym
TIRZ-DOSE-NL
Enrollment
1700
Registered
2026-03-31
Start date
2026-04-01
Completion date
2026-08-01
Last updated
2026-03-31

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Obesity (Disorder), Overweight , Obesity

Keywords

Obesity, Weightloss, Tirzepatide, Adults, Body composition, Dose escalation

Brief summary

Tirzepatide is one of the new medications for the treatment of obesity. In clinical research people treated with Tirzepatide have weight loss up to 21%. But there is only a little bit of research showing the effect of Tirzepatide in clinical practice. In this retrospective observational study the investigators will evaluate the effectiveness of tirzepatide in routine clinical practice among adults with obesity in the Netherlands.The main questions it aims to answer are: * How much weight do patients lose after six months of treatment with tirzepatide combined with lifestyle coaching? * How is the medication dosed in daily practice? Researchers will use data from electronic health records of patients in multiple outpatient locations of the Dutch Obesity Clinic (NOK, Nederlandse Obesitas Kliniek).

Interventions

DRUGTirzepatide

Initiating treatment with tirzepatide

Sponsors

Radboud University Medical Center
Lead SponsorOTHER
Nederlandse Obesitas Kliniek
CollaboratorOTHER

Study design

Observational model
COHORT
Time perspective
RETROSPECTIVE

Eligibility

Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No

Inclusion criteria

* Adults (age ≥18 years old) * A BMI of ≥ 30 kg/m2 or a BMI ≥ 27 kg/m2 with at least one obesity complication (e.g., hypertension, dyslipidaemia)

Exclusion criteria

* Pregnant women or pregnancy during treatment * Previously treated for obesity (with pharmacotherapy, endoscopic treatment or metabolic-bariatric surgery) * Patients with diabetes

Design outcomes

Primary

MeasureTime frameDescription
Weight changeBaseline-6 months%TWL= (start weight - 6 month weight/baseline weight)\*100%

Secondary

MeasureTime frameDescription
Changes in body compositionBasline-6 monthsFat percentage (FP) and fat free mass (FFM)
Demographic and clinical characteristicsBaseline* Age * Gender * Treatment location * Obesity associated diseases: hypertension, dyslipidaemia, sleep apnoea and osteoarthritis * Previous lifestyle treatment for obesity
Weight loss by maintenance doseBaseline-6 monthsMaintenance dose (10mg and 15mg)
Tirzepatide dosing patternsBaseline-6 monthsIncluding the initial prescribed dose and subsequent dose escalations throughout the treatment course
WeigthBaseline-6 monthsin kilograms (kg)
HeightBaseline-6 monthsin centimeters (cm)

Countries

Netherlands

Contacts

CONTACTPuck van den Hooff, MD
puck.vandenhooff@radboudumc.nl+31649653657
CONTACTValerie Monpellier, MD, PhD
vmonpellier@obesitaskliniek.nl+31645247665
PRINCIPAL_INVESTIGATORMaria Hopman, MD, PhD

Radboud University Medical Center

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Apr 1, 2026