Skip to content

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)

A Phase 4, Prospective, Open-Label, Single-Arm Study to Assess the Effectiveness of Tirzepatide After Initiation of Ixekizumab in Adult Participants With Active Psoriatic Arthritis and Overweight or Obesity in Clinical Practice.

Status
Recruiting
Phases
Phase 4
Study type
Interventional
Source
ClinicalTrials.gov
Registry ID
NCT06864026
Enrollment
200
Registered
2025-03-07
Start date
2025-03-06
Completion date
2027-11-01
Last updated
2026-09-08

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

Conditions

Overweight or Obesity, Psoriatic Arthritis

Brief summary

The main purpose of this study is to assess the effectiveness of adding tirzepatide to ixekizumab therapy in standard clinical practice in participants with active PsA and obesity or overweight with at least 1 weight-related comorbidity. The study will last up to 12 months.

Interventions

DRUGTirzepatide

Administered SC

Sponsors

Eli Lilly and Company
Lead SponsorINDUSTRY

Study design

Allocation
NA
Intervention model
SINGLE_GROUP
Primary purpose
TREATMENT
Masking
NONE

Eligibility

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

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. * Have a known hypersensitivity to any component of tirzepatide. * Have a personal or family history of medullary thyroid cancer. * Have multiple endocrine neoplasia type 2. * Have type 1 diabetes mellitus. * Have a history of chronic or acute pancreatitis at any time before screening. * Have a history of proliferative diabetic retinopathy, diabetic maculopathy, or nonproliferative diabetic retinopathy that requires acute treatment. * Have a history of ketoacidosis or hyperosmolar state/coma. * Have a history of severe hypoglycemia unawareness within the 6 months before screening. * Have a history of severe gastrointestinal complications, including gastroparesis, gastroesophageal reflux disease, dyspepsia, chronic nausea/vomiting.

Design outcomes

Primary

MeasureTime frameDescription
Percentage of Participants Achieving Normalized Functioning Health Assessment Questionnaire - Disability Index (HAQ-DI) ≤0.5 at 12 Months of Therapy12 MonthsThe 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 Therapy12 MonthsPercentage of participants achieving at least a 10% weight loss at 12 months of therapy.

Secondary

MeasureTime frameDescription
Percentage of Participants Achieving Tender Joint Count (TJC) ≤1Month 6 and Month 12Percentage of participants achieving TJC ≤1.
Percentage of Participants Achieving Swollen Joint Count (SJC) ≤1Month 6 and Month 12Percentage of participants achieving SJC ≤1.
Percentage of Participants Achieving Body Surface Area (BSA) ≤3%Month 6 and Month 12Percentage of participants achieving BSA ≤3%.
Percentage of Participants Achieving Patient Global Assessment of Disease Activity Numeric Rating Score (PaGADA NRS) of ≤2Month 6 and Month 12The PaGADA NRS is an 11-point scale from 0 to 10 that is anchored by 2 verbal descriptors, "very well" and "very poor." Higher scores represent a higher level of disease activity.
Percentage of Participants Achieving Patient Pain Visual Analogue Scale (VAS) ≤15Month 6 and Month 12The Patient's Assessment of Arthritis Pain is a single-item, patient-reported outcome instrument, used to access the current severity of participants' joint pain in relation to their PsA on a horizontal VAS of 0 to 100 mm. The Patient's Assessment of Arthritis Pain is anchored by 2 verbal descriptors, "no pain" and "as severe as can imagine."
Percentage of Participants Achieving Physician Global Assessment of Disease Activity (PhGADA) NRS ≤2Month 6 and Month 12The PhGADA NRS is an 11-point scale anchored by 2 verbal descriptors, "none" and "extremely active disease."
Percentage of Participants Achieving HAQ-DI Sore ≤0.5 and at Least a 10% Weight LossMonth 6 and Month 12The 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 With a Functional Assessment of Chronic Illness Therapy (FACIT) -Fatigue With ≥4-point Increase from BaselineMonth 6 and Month 12FACIT-F is a patient-reported, 13-item questionnaire that specifically assess the self-reported severity of fatigue and its impact upon daily activities and functioning. The FACIT-F uses 0 ("not at all") to 4 ("very much") Likert scale to assess fatigue and its impact in the past 7 days. Total score ranges from 0 to 52, based on a rating of 5-point Likert scale. Scores for negatively worded items are reversed, such that higher scores are better (that is, less fatigue).
Percentage of Participants With a Short-Form 36 (SF36) Physical Component Score (PCS) Minimum Clinically Important Difference (MCID)Month 6 and Month 12The SF-36v2 acute form is a 36-item, generic, patient-completed measure designed to assess health-related quality of life with 8 health domains. Items are rated on 3-, 5-, or 6-point Likert scales. Each domain is individually scored by summing item responses and transforming them to a 0-100 scale. The eight domains are aggregated into two summary scores: Physical and Mental Component Summaries. Each summary score is norm based and presented in the form of T-scores, with a mean of 50 and a standard deviation of 10, with higher scores indicating better health status or functioning.
Percentage of Participants With a Short-Form 36 (SF36) Mental Component Score (MCS) MCIDMonth 6 and Month 12The SF-36v2 acute form is a 36-item, generic, patient-completed measure designed to assess health-related quality of life with 8 health domains. Items are rated on 3-, 5-, or 6-point Likert scales. Each domain is individually scored by summing item responses and transforming them to a 0-100 scale. The eight domains are aggregated into two summary scores: Physical and Mental Component Summaries. Each summary score is norm based and presented in the form of T-scores, with a mean of 50 and a standard deviation of 10, with higher scores indicating better health status or functioning.
Percentage of Participants Achieving a HAQ-DI score ≤0.5Month 6The 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 with ≥10% Weight Loss at Month 6Month 6Percentage of participants with ≥10% weight loss at month 6.
Mean Percent Change of Weight from BaselineBaseline, Month 6 and Baseline, Month 12Mean percent change of weight from baseline.

Countries

Puerto Rico, United States

Contacts

CONTACTTrial questions or participation questions: 1-877-CTLILLY (1-877-285-4559) or
LillyTrials@Lilly.com1-317-615-4559
CONTACTPhysicians interested in becoming principal investigators please contact
clinical_inquiry_hub@lilly.com
STUDY_DIRECTORCall 1-877-CTLILLY (1-877-285-4559) or 1-317-615-4559 Mon - Fri 8 AM - 8 PM Eastern time (UTC/GMT - 5 hours, EST)

Eli Lilly and Company

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Sep 9, 2026