Study to Assess How ABBV-951 is Absorbed When Administered at Different Subcutaneous Sites of Adult Participants With Parkinson's Disease
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ClinicalTrials.gov Identifier: NCT05094050 |
Recruitment Status :
Completed
First Posted : October 26, 2021
Last Update Posted : March 24, 2023
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Parkinson's disease (PD) is a neurological condition, which means it affects the brain. This study will evaluate how ABBV-951 is absorbed under the skin of participants with PD when administered to arm, thigh and flank compared to the abdomen.
ABBV-951 is an investigational drug being developed for the treatment of PD. Study doctors randomly assign participants to 1 of 4 groups, called treatment arms. Each treatment arm receives ABBV-951 administered in a different order in the arm, high, flank and abdomen. Approximately 12 adult participants over 30 years with a diagnosis of PD will be enrolled in approximately 10 sites in the United States.
Participants will receive continuous (24hours/day) subcutaneous infusion of ABBV-951 for 2 consecutive days for each infusion site (arm, thigh, flank and abdomen), for a total duration of treatment up to 12 days.
There may be higher treatment burden for participants in this trial compared to their standard of care. Participants will be confined at a hospital or clinic. The effect of the treatment will be checked by medical assessments, blood tests, checking for side effects and completing questionnaires. Adverse events will be monitored throughout the study.
Condition or disease | Intervention/treatment | Phase |
---|---|---|
Parkinson's Disease | Drug: ABBV-951 | Phase 1 |
Study Type : | Interventional (Clinical Trial) |
Actual Enrollment : | 16 participants |
Allocation: | Randomized |
Intervention Model: | Parallel Assignment |
Masking: | None (Open Label) |
Primary Purpose: | Treatment |
Official Title: | Parkinson's Disease: A Comparative Study of Levodopa and Carbidopa Bioavailability Following Foslevodopa/Foscarbidopa Infusion at Different Subcutaneous Sites in Parkinson's Disease Patients |
Actual Study Start Date : | January 18, 2022 |
Actual Primary Completion Date : | March 17, 2023 |
Actual Study Completion Date : | March 17, 2023 |

Arm | Intervention/treatment |
---|---|
Experimental: Arm 1: ABBV-951
Participants will receive ABBV-951 for 2 consecutive days in the abdomen (Period 1), flank (Period 2), arm (Period 3) and thigh (Period 4).
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Drug: ABBV-951
Continuous Subcutaneous Infusion (CSCI)
Other Name: Foslevodopa/foscarbidopa |
Experimental: Arm 2: ABBV-951
Participants will receive ABBV-951 for 2 consecutive days in the arm (Period 1), abdomen (Period 2), thigh (Period 3) and flank (Period 4).
|
Drug: ABBV-951
Continuous Subcutaneous Infusion (CSCI)
Other Name: Foslevodopa/foscarbidopa |
Experimental: Arm 3: ABBV-951
Participants will receive ABBV-951 for 2 consecutive days in the thigh (Period 1), arm (Period 2), flank (Period 3) and abdomen (Period 4).
|
Drug: ABBV-951
Continuous Subcutaneous Infusion (CSCI)
Other Name: Foslevodopa/foscarbidopa |
Experimental: Arm 4: ABBV-951
Participants will receive ABBV-951 for 2 consecutive days in the flank (Period 1), thigh (Period 2), abdomen (Period 3) and arm (Period 4).
|
Drug: ABBV-951
Continuous Subcutaneous Infusion (CSCI)
Other Name: Foslevodopa/foscarbidopa |
- Maximum Observed Plasma Concentration (Cmax) of Levodopa (LD) [ Time Frame: Up to 8 Days ]Maximum observed plasma concentration (Cmax) of Levodopa (LD).
- Area Under the Plasma Concentration-Time Curve (AUC) for the 24-hour Interval of LD [ Time Frame: Up to 8 Days ]Area under the plasma concentration-time curve (AUC) for the 24-hour interval of LD.
- Minimum Observed Plasma Concentration (Cmin) of LD [ Time Frame: Up to 8 Days ]Minimum observed plasma concentration (Cmin) of LD.
- Degree of Fluctuation (DFL) of LD [ Time Frame: Up to 8 Days ]DFL = (Cmax-Cmin)/(average plasma concentration).
- Swing of LD [ Time Frame: Up to 8 Days ]Swing = (Cmax-Cmin)/Cmin.
- Maximum Observed Plasma Concentration (Cmax) of Carbidopa (CD) [ Time Frame: Up to 8 Days ]Maximum observed plasma concentration (Cmax) of CD.
- Area Under the Plasma Concentration-Time Curve (AUC) for the 24-hour Interval of CD [ Time Frame: Up to 8 Days ]Area under the plasma concentration-time curve (AUC) for the 24-hour interval of CD.
- Minimum Observed Plasma Concentration (Cmin) of CD [ Time Frame: Up to 8 Days ]Minimum observed plasma concentration (Cmin) of CD.
- Degree of Fluctuation (DFL) of CD [ Time Frame: Up to 8 Days ]DFL = (Cmax-Cmin)/(average plasma concentration).
- Swing of CD [ Time Frame: Up to 8 Days ]Swing = (Cmax-Cmin)/Cmin.

Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the contacts provided below. For general information, Learn About Clinical Studies.
Ages Eligible for Study: | 30 Years and older (Adult, Older Adult) |
Sexes Eligible for Study: | All |
Accepts Healthy Volunteers: | No |
Inclusion Criteria:
- Diagnosis of idiopathic Parkinson's disease (PD) that is Levodopa-responsive.
- Must be taking a minimum of 400 mg/day of levodopa equivalents (LE) and be judged by the investigator to have motor symptoms inadequately controlled by current therapy.
- Must have recognizable/identifiable "Off" and "On" states (motor fluctuations), and have a minimum daily average of 2.5 hours of "Off" time (with a minimum of 2 hours of "Off" time each day).
Exclusion Criteria:
- History of significant skin conditions or disorders (e.g., psoriasis, atopic dermatitis, etc.) or evidence of recent sunburn, acne, scar tissue, tattoo, open wound, branding, or colorations that in the investigator's opinion would interfere with the infusion of the study drug or could interfere with study assessments.

To learn more about this study, you or your doctor may contact the study research staff using the contact information provided by the sponsor.
Please refer to this study by its ClinicalTrials.gov identifier (NCT number): NCT05094050
United States, Colorado | |
University of Colorado Hospital /ID# 229974 | |
Aurora, Colorado, United States, 80045 | |
United States, District of Columbia | |
Georgetown University Hospital /ID# 230224 | |
Washington, District of Columbia, United States, 20007 | |
United States, Illinois | |
Rush University Medical Center /ID# 229983 | |
Chicago, Illinois, United States, 60612 | |
United States, North Carolina | |
Carolina Phase 1, LLC /ID# 239836 | |
Raleigh, North Carolina, United States, 27612-8106 | |
United States, Oklahoma | |
The Movement Disorder Clinic of Oklahoma /ID# 238610 | |
Tulsa, Oklahoma, United States, 74136-6378 | |
United States, Tennessee | |
Vanderbilt University Medical Center /ID# 230255 | |
Nashville, Tennessee, United States, 37232-0011 | |
United States, Texas | |
Parkinson Disease Movement Disorders Clinic /ID# 245791 | |
Austin, Texas, United States, 78746 | |
Texas Movement Disorder Specialists /ID# 238607 | |
Georgetown, Texas, United States, 78628-4126 | |
Baylor College of Medicine - Baylor Medical Center /ID# 239631 | |
Houston, Texas, United States, 77030-3411 | |
United States, Utah | |
University of Utah Health Care /ID# 241219 | |
Salt Lake City, Utah, United States, 84132 |
Study Director: | ABBVIE INC. | AbbVie |
Responsible Party: | AbbVie |
ClinicalTrials.gov Identifier: | NCT05094050 |
Other Study ID Numbers: |
M20-339 |
First Posted: | October 26, 2021 Key Record Dates |
Last Update Posted: | March 24, 2023 |
Last Verified: | March 2023 |
Individual Participant Data (IPD) Sharing Statement: | |
Plan to Share IPD: | No |
Studies a U.S. FDA-regulated Drug Product: | Yes |
Studies a U.S. FDA-regulated Device Product: | No |
Product Manufactured in and Exported from the U.S.: | No |
Parkinson's Disease Foslevodopa/foscarbidopa ABBV-951 Levodopa (LD) Carbidopa (CD) |
Parkinson Disease Parkinsonian Disorders Basal Ganglia Diseases Brain Diseases Central Nervous System Diseases |
Nervous System Diseases Movement Disorders Synucleinopathies Neurodegenerative Diseases |