PARKINSON DISEASE (Disorder)Phase 4RELIEF-PDNCT07483398
EFficacy and safEty of cRisugabalin on nocipLastic paIn in Patients With Parkinson's Disease (RELIEF-PD): a Multicentre, Double-blind, Randomised Controlled Trial
A Phase 4 study testing Crisugabalin in people with PARKINSON DISEASE (Disorder), run by Guangdong Provincial People's Hospital at 1 site in China.
Trial summary
The goal of this clinical trial is to evaluate the efficacy and safety of Crisugabalin in adult participants with Parkinson's disease suffering from nociceptive pain. The main question it aims to answer is: 1. Does Crisugabalin significantly reduce pain intensity compared to placebo? 2. Read more about this study
- Who is it for?
- Ages 18 to 80 years
- Conditions the study is for
- PARKINSON DISEASE (Disorder)
- What is being tested?
- Crisugabalin
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- Yes, some participants may receive a placebo
- How many people
- 166 participants
- Where
- 1 siteChina
- Study dates
- 13 Mar 2026to 15 Aug 2027
- Phase
- Phase 4
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 80 years
- All sexes
- No healthy volunteers
- Adult, Older adult
Who may be able to join
- Age 18-80 years (including 18 years), male or female.
- Diagnosis of Parkinson's disease (PD) according to the diagnostic criteria established by the International Parkinson and Movement Disorder Society (MDS), including clinically established or clinically probable PD, with diagnosis made at least 6 months prior to screening.
- Patients with nociplastic pain according to the classification of chronic pain in Parkinson's disease defined by the International Association for the Study of Pain (IASP).
- Chronic pain associated with Parkinson's disease has been stable for at least 3 months prior to screening.
- Stable anti-Parkinsonian medication regimen for at least 1 month prior to screening.
- Average Daily Pain Score (ADPS) ≥4 during the week prior to screening.
- Able to understand the study procedures and requirements, willing to comply with the clinical trial protocol, and voluntarily sign written informed consent.
Who cannot join
- Severe Parkinson's disease defined as stage 5 on the Hoehn and Yahr Scale at screening (wheelchair-bound or bedridden unless aided).
- Severe cognitive impairment or dementia defined as Mini-Mental State Examination (MMSE) score ≤24.
- Presence of severe pain unrelated to Parkinson's disease.
- Presence of neurological disorders unrelated to Parkinson's disease.
- History of severe psychiatric disorders within 1 year prior to screening.
- Presence of chronic systemic diseases that, in the investigator's opinion, may affect participation in the study, including but not limited to:
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- Severe cardiopulmonary diseases, such as unstable angina, myocardial infarction, severe arrhythmia, heart failure classified as WHO functional class III-IV, poorly controlled hypertension despite treatment (systolic blood pressure >160 mmHg or diastolic blood pressure >100 mmHg at screening), or recurrent asthma attacks; (2) Neurological or psychiatric disorders including epilepsy, recurrent dizziness or headache, memory impairment, or cognitive disorders.
- 7. Severe hematologic, hepatic, or renal dysfunction meeting any of the following laboratory criteria:
- Hematology: neutrophils <1.5 × 10⁹/L, or platelets <90 × 10⁹/L, or hemoglobin <100 g/L;
- Liver function: alanine aminotransferase (ALT) or aspartate aminotransferase (AST) >3 × the upper limit of normal (ULN), or total bilirubin (TBIL) >1.5 × ULN;
- Renal function: estimated glomerular filtration rate (eGFR) <60 mL/min/1.73 m² (calculated using the simplified MDRD equation) or patients receiving renal dialysis;
- Creatine kinase (CK) >2 × ULN. 8. Use of crisugabalin, mirogabalin, pregabalin, or gabapentin within 28 days prior to screening, unless a washout period of at least 1 month has been completed.
- 9. Use of strong opioid medications for the treatment of Parkinson's disease-related pain within 3 months prior to screening.
- 10. Prior treatment with pregabalin ≥300 mg/day or gabapentin ≥1200 mg/day with lack of clinical efficacy, as judged by the investigator.
- 11. Known allergy or hypersensitivity to the investigational drug, rescue medication components, or other structurally related compounds or excipients.
- 12. Pregnant or breastfeeding women, women planning pregnancy during the study period, or participants unwilling to use reliable contraception from signing the informed consent form until 28 days after the last dose of the study drug (including condoms, spermicides, or intrauterine devices), or women planning to use progesterone-containing contraceptive pills during this period.
- 13. History of deep brain stimulation (DBS) surgery. 14. Participation in any other clinical trial within 30 days prior to screening.
- 15. Any other condition that, in the opinion of the investigator, makes the participant unsuitable for participation in this study.
- Withdrawal Criteria:
- Occurrence of serious adverse reactions that are intolerable to the participant.
- Development of serious physical illness during the observation period.
- Violation of the study protocol.
- Loss to follow-up.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: Fficacy and Safety of Crisugabalin on Nociplastic Pain in Patients With Parkinson's Disease (RELIEF-PD): A Multicentre, Double-Blind, Randomised Controlled Trial
The goal of this clinical trial is to evaluate the efficacy and safety of Crisugabalin in adult participants with Parkinson's disease suffering from nociceptive pain. The main question it aims to answer is:
- Does Crisugabalin significantly reduce pain intensity compared to placebo?
- What is the safety and tolerability profile of Crisugabalin in patients with Parkinson's disease?
Read more
Researchers will compare participants receiving Crisugabalin to those receiving a matching placebo to see if the investigational drug leads to a greater reduction in pain scores and an improvement in quality of life without unacceptable side effects.
Participants will:
- Be randomly assigned to receive either Crisugabalin capsules or a placebo.
- Take the study medication orally twice daily for a specified treatment period.
- Complete regular pain assessments using standardized scales (e.g., VAS or NRS).
- Undergo physical examinations and laboratory tests to monitor safety.
- Record any adverse events and changes in Parkinson's disease symptoms in a diary.
- Conditions
- PARKINSON DISEASE (Disorder)
- Being tested
- Crisugabalin, Placebo
- Keywords
- Parkinson's disease, nociceptive pain, crisugabalin
- Medical subject headings
- Parkinson Disease, Nociceptive Pain
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
CrisugabalinDrug
Crisugabalin will be administered orally to participants with Parkinson's disease experiencing nociplastic pain. The study uses a double-blind, randomized, placebo-controlled design. Participants will receive a titrated dose of Crisugabalin, starting at 20 mg twice daily and gradually increasing up to a target dose of 40 mg twice daily, based on individual tolerability, over a 4-week titration period. The total treatment duration is 12 weeks. The primary purpose of Crisugabalin administration is to evaluate its efficacy and safety in reducing nociplastic pain in PD patients. Participants will be monitored regularly for adverse events, vital signs, and laboratory parameters throughout the study period.
PlaceboDrug
Placebo is in distinguishable from active crisugabalin in appearance and administration.
| Study group | Role | What they receive |
|---|---|---|
| Crisugabalin group | Experimental | Participants will receive oral Crisugabalin capsules twice daily (BID) for 12 weeks. Initial dose: 20 mg BID; may escalate to 40 mg BID based on tolerability. Receives: Drug: Crisugabalin |
| Placebo Comparator | Placebo comparator | Participants in this arm will receive oral placebo capsules twice daily (BID) for 12 weeks. Placebo capsules are identical in appearance, taste, and packaging to active Crisugabalin. All safety and efficacy assessments follow the same schedule as the experimental group. Receives: Drug: Placebo |
What is being measured
The primary outcome is the main question the study is designed to answer.
Change from Baseline in Average Daily Pain Score (ADPS) at Weeks 12.
Change from baseline in the average daily pain score (ADPS) assessed at Week 12 of treatment.
Measured: Baseline to Weeks 12
Secondary outcomes (5)
Change from Baseline in Average Daily Pain Score (ADPS) at Weeks 2, 4, and 8
Change from baseline in the average daily pain score (ADPS) assessed at Week 2, Week 4, and Week 8 of treatment.
Measured: Baseline to Weeks 2, 4, and 8
Change from Baseline in King's Parkinson's Disease Pain Scale (KPPS) Score at Weeks 2, 4, 8, and 12
Change from baseline in the total score of the King's Parkinson's Disease Pain Scale (KPPS) assessed at Week 2, Week 4, Week 8, and Week 12 of treatment.
Measured: Baseline to Weeks 2, 4, 8, and 12
Change from Baseline in Short-Form McGill Pain Questionnaire (SF-MPQ) Score at Weeks 2, 4, 8, and 12
Change from baseline in the total score of the Short-Form McGill Pain Questionnaire (SF-MPQ) assessed at Week 2, Week 4, Week 8, and Week 12 of treatment.
Measured: Baseline to Weeks 2, 4, 8, and 12
ADPS Responder Rate at Week 12
Proportion of participants achieving a reduction in Average Daily Pain Score (ADPS) of ≥30% and ≥50% from baseline to Week 12.
Measured: Week 12
Patient Global Impression of Change (PGIC) for Numbness, Pain, and Paresthesia at Week 12
Patient assessment of overall improvement in symptoms of numbness, pain, and paresthesia using the Patient Global Impression of Change (PGIC) scale at Week 12 (after 12 weeks of treatment).
Measured: Week 12
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted19 Mar 2026
- Study start13 Mar 2026
- Primary completion15 Aug 2027 (estimated)
- Study completion15 Aug 2027 (estimated)
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for PARKINSON DISEASE (Disorder)Studies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 4
- Primary purpose
- Treatment
- Allocation
- Randomised
- Intervention model
- Parallel groups
- Masking
- Triple blind
- Who is masked
- Participant, Investigator, Outcomes assessor
- Enrolment
- 166 participants (estimated)
Sponsor and investigators
- Lead sponsor
- Guangdong Provincial People's Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- Sichuan Haisco Pharmaceutical Group Co., Ltd
- Responsible party
- Principal investigator, Yuhu Zhang, Guangdong Provincial People's Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT07483398
- Sponsor's protocol ID
- KY2025-1335-04
- Acronym
- RELIEF-PD
- Status last verified
- Sep 2026
- First submitted
- 16 Mar 2026
- Last updated
- 14 Sep 2026
- Results posted
- No
- Data monitoring committee
- Yes
- FDA-regulated drug
- No
- FDA-regulated device
- No
- Individual data sharing
- Yes: De-identified individual participant data will be made available upon request to qualified researchers for non-commercial purposes, starting 6 months after publication of the primary manuscript. Requests will be reviewed by an independent data access committee.