NCT06864026 · Eli Lilly and Company
A Study to Investigate Effectiveness of Tirzepatide Following Initiation of Ixekizumab in Participants With Active Psoriatic Arthritis and Overweight or Obesity in Clinical Practice (TOGETHER AMPLIFY-PsA)
What this study is about
The main purpose of this study is to assess the effectiveness of adding tirzepatide to ixekizumab therapy in standard clinical practice in participants with moderate-to-severe PsA and obesity or overweight with at least 1 weight-related comorbidity. The study will last up to 12 months.
View original scientific description
The main purpose of this study is to assess the effectiveness of adding tirzepatide to ixekizumab therapy in standard clinical practice in participants with moderate-to-severe PsA and obesity or overweight with at least 1 weight-related comorbidity. The study will last up to 12 months.
Interventions
DRUG
Tirzepatide
Administered SC
Primary outcome measures
Percentage of Participants Achieving Normalized Functioning Health Assessment Questionnaire - Disability Index (HAQ-DI) ≤0.5 at 12 Months of Therapy
Time frame: 12 Months
The HAQ-DI is a patient-reported outcome questionnaire that is used to measure disease associated disability as an assessment of physical function. It consists of 20 questions referring to 8 domains of functioning. Participants assess their degree of difficulty when performing the activities over the past week on a 4-item ordinal scale, ranging from 0, "without any difficulty," to 3, "unable to do." The scores of each of the 8 domains are summed and divided by 8. Higher scores indicate more limitations in physical function.
Percentage of Participants Achieving at Least a 10% Weight Loss at 12 Months of Therapy
Time frame: 12 Months
Percentage of participants achieving at least a 10% weight loss at 12 months of therapy.
Who can participate
This study lists these criteria on ClinicalTrials.gov. A study coordinator reviews eligibility during screening — this page does not determine whether you qualify.
Inclusion criteria
- Have a diagnosis of active psoriatic arthritis (PsA) as defined by a rheumatologist or other healthcare professional (HCP) experienced in treating PsA.
- Body Mass Index (BMI) of 30 kilograms per meter squared (kg/m²) or greater (obesity) or 27 kg/m2 to \<30 kg/m² (overweight) in the presence of at least 1 weight-related comorbid condition (hypertension, dyslipidemia, type 2 diabetes, obstructive sleep apnea, or cardiovascular disease).
- Who have been treated with ixekizumab for approximately 3 months (±1 month) prior to decision to add tirzepatide.
- Must be able to initiate tirzepatide (Day 0) within 30 days of treatment decision (baseline or screening).
Exclusion criteria
- Have currently received ixekizumab for more than 4 months or less than 2 months.
- Had any exposure to tirzepatide or other glucagon-like peptide-1 (GLP-1) receptor agonist (for example, dulaglutide, liraglutide, or semaglutide).
- Are currently enrolled in any other clinical study.
Where
- Avondale, Arizona
- Chandler, Arizona
- Flagstaff, Arizona
- Gilbert, Arizona
- Glendale, Arizona
- Mesa, Arizona
- Phoenix, Arizona
- Sun City, Arizona
- Tucson, Arizona
- Apple Valley, California
- Covina, California
- Huntington Beach, California
And 39 more locations — see the full list below.
Related conditions & keywords
Frequently asked questions
What is a clinical trial?
A clinical trial is a research study that tests new medical treatments, drugs, devices, or procedures to determine their safety and effectiveness. Trials are carefully designed and monitored to protect participants while advancing medical knowledge.
Is it safe to participate?
Clinical trials follow strict safety guidelines and ethical standards. Trials must be reviewed and approved, and participants are closely monitored by medical professionals throughout the study. You can withdraw at any time if you choose.
Will I be compensated?
Many clinical trials offer compensation for your time, travel expenses, and inconvenience. The specific compensation varies by study and will be discussed during the screening process. All study-related medical care is typically provided at no cost to participants.
Will I receive a placebo instead of treatment?
When effective treatment exists, participants typically receive either the standard treatment plus the study intervention, or the standard treatment plus placebo. You would not be denied effective care. Placebos are primarily used when no proven treatment is available, or in addition to standard care. Your trial consent form will clearly explain what treatments you may receive.
Can I leave a trial if I change my mind?
Absolutely. Participation in clinical trials is completely voluntary. You have the right to withdraw from the study at any time, for any reason, without penalty or loss of benefits to which you are otherwise entitled.
How long does a clinical trial last?
Trial duration varies widely depending on the study design and purpose. Some trials last just a few weeks, while others may continue for months or years. The study coordinator will provide specific timeline information during your screening call.
Data: ClinicalTrials.gov · synced Jun 11, 2026 · Source of record for eligibility and locations