CompletedPhase 2

A Study of YZJ-4729 Tartrate Injection for the Treatment of Pain After Orthopedic Surgery

China150 participantsStarted 2025-05-23

Plain-language summary

The primary objective is to evaluate the analgesic efficacy and safety of IV YZJ-4729 Tartrate Injection in patients with acute postoperative pain following Orthopedic surgery

Who can participate

Age range

18 Years – 75 Years

Sex

ALL

See this in plain English?

AI-rewrites the medical criteria so a patient or caregiver can understand them. Always confirm with the trial site.

Inclusion criteria

. Be able to understand the study purpose and cooperate with the study procedures of this trial, voluntarily provide written informed consent
. BMI≥18.0 kg/m2 and ≤28.0 kg/m2
. ASA I to II
. Experiences a pain intensity rating of moderate to severe acute pain following orthopedic surgery, with a pain intensity score of ≥4 on a Numeric Rating Scale (NRS) within 4 hours post-surgery

Exclusion criteria

. Opioid allergy
. Nervous system diseases (e.g. epilepsy)
. Psychiatric disorders (e.g. depression)
. History of difficult airways
. Random blood glucose ≥11.1 mmol/L
. Subjects with systolic blood pressure \>160 mmHg and/or diastolic blood pressure \>100 mmHg or systolic blood pressure \< 90 mmHg
. Abnormal pulse oxygen saturation (SpO2 \<92 %)

Questions worth asking your doctor

Bring these to your next appointment. They're a starting point for a shared conversation — not a sign you qualify or a recommendation to enrol.

1Based on my diagnosis and history, is this trial worth exploring for me — or is there a standard treatment we should try first?
2What does this trial's phase tell us about how much is already known about its safety and benefit?
3What would taking part actually involve for me — visits, tests, time, and travel?
4What are the known and possible risks or side effects I should weigh, and how would they be monitored?
5If this trial isn't the right fit, what other options or trials would you suggest I look into?

Generated to help you prepare — always confirm anything about your own eligibility and care with the study team and your doctor.

Questions for the trial coordinator

The trial coordinator is the person who runs the study day to day. These cover the practical side — logistics, costs, and what taking part would actually mean for your life. The study team confirms whether you meet the criteria; these are questions to ask, not a sign you qualify.

1What does taking part actually involve week to week — how many visits, where, and how long does each one take?
2What costs are covered by the study, and what might I have to pay for myself, including travel, parking, or time off work?
3What happens during screening, and what happens if the study team confirms I don't meet the criteria after those tests?
4Who pays for the scans, blood work, and other tests the trial requires — the study, my insurance, or me?
5How will being in the trial affect my regular care, and will my own doctor stay informed and involved?
6Can I leave the trial at any point if I change my mind, and what would happen to my care if I do?

A starting point for the conversation — always confirm anything about your own eligibility, costs, and care with the study team and your doctor.

What they're measuring

The sum of pain intensity differences in pain score over 48 hours at rest

Timeframe: 48 hours

Trial details

NCT IDNCT06901830

SponsorShanghai Haiyan Pharmaceutical Technology Co., Ltd.

Sponsor typeINDUSTRY

Study typeINTERVENTIONAL

Primary completion2025-12-06

View on ClinicalTrials.gov More Pain trials