> Trialight public data. Index of pages: https://trialight.com/llms.txt > Web page: https://trialight.com/data/trial/a-clinical-study-to-evaluate-the-efficacy-and-safety-of-c555a9ce-41fa-49b0-a64c-0be7162acaf4 > Record changed: 2026-10-13 # A Clinical Study to Evaluate the Efficacy and Safety of SIM0417 Orally Co-Administered With Ritonavir in Symptomatic Adult Participants With Mild to Moderate COVID-19 NCT05506176 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Phase Phase 2/Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Recruitment status Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Participants 1,208 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Lead sponsor Jiangsu Simcere Pharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Start date 2022-08-19 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) Number of sites 35 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Title and summary **Summary** This Phase Ⅱ/Ⅲ study is to evaluate whether or not there is a difference in time recovery of COVID-19 signs and symptoms through Day 29 between SIM0417/ritonavir and placebo. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Short title** A Clinical Study to Evaluate the Efficacy and Safety of SIM0417 Orally Co-Administered With Ritonavir in Symptomatic Adult Participants With Mild to Moderate COVID-19 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Official title** A Multicenter, Randomized, Double-blind, Phase Ⅱ/Ⅲ Clinical Study to Evaluate the Efficacy and Safety of SIM0417 Orally Co-Administered With Ritonavir in Symptomatic Adult Participants With Mild to Moderate COVID-19 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Status and phase **Control arm** Placebo Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Registry reports results** No Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Listing at source** Listed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Recruitment status** Completed Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Phase** Phase 2/Phase 3 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Study type** Interventional Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Dates **Completion date** 2023-03-21 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **First posted** 2022-08-18 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Registry last updated** 2023-05-06 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Primary completion date** 2023-01-23 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Start date** 2022-08-19 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Size and sites **Actual participants** 1,208 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Participants** 1,208 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Participant count basis** Actual Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Protocol amendments** 1 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Number of sites** 35 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Sponsor and oversight **Data monitoring committee** Yes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Registry sponsor category** Industry Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Lead sponsor** Jiangsu Simcere Pharmaceutical Co., Ltd. Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Source registry** ClinicalTrials.gov Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Identifiers **Registry ID** NCT05506176 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **ClinicalTrials.gov ID** NCT05506176 Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) **Registry record** Open registry record Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Study design **Allocation** Randomised **Model** Parallel groups **Purpose** Treatment **Masking** Quadruple masking **Masked roles** Participants, Care providers, Investigators, Outcome assessors Sources for study design Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Outcomes ### Primary outcomes 1. Time to sustained recovery of 11 COVID-19 symptoms Timeframe: Baseline through Day 29 The time from the start of treatment to the time when 11 COVID-19 symptoms get scores of 0 (absence or return to the status before the onset) for two consecutive days.(Participant-completed study diary (COVID-19 symptoms and signs, and global impression questions)) ### Secondary outcomes 1. Time to sustained recovery of 5 COVID-19 symptoms Timeframe: Baseline through Day 29 The time from the start of treatment to the time when 5 COVID-19 symptoms get scores of 0 (absence or return to the status before the onset) or 1 (mild) for two consecutive days. 2. Time to sustained alleviation of 7 COVID-19 symptoms Timeframe: Baseline through Day 29 The time from the start of treatment to the time when 7 COVID-19 symptoms get scores of 0 (absence or return to the status before the onset) or 1 (mild) for two consecutive days. 3. Time to sustained alleviation of 11 COVID-19 symptoms Timeframe: Baseline through Day 29 The time from the start of treatment to the time when 11 COVID-19 symptoms get scores of 0 (absence or return to the status before the onset) or 1 (mild) for two consecutive days. 4. Viral load Timeframe: Baseline through Day 14 Changes of viral load compared to the baseline. 5. SARS-CoV-2 RNA Timeframe: Baseline through Day 14 Proportion of participants with SARS-CoV-2 RNA below the threshold. 6. Severe COVID-19 disease Timeframe: Baseline through Day 29 Incidence of disease progression by COVID-19 severity. 7. Hospitalization or death Timeframe: Baseline through Day 29 Proportion of participants with hospitalization or death from any cause. 8. ICU stay Timeframe: Baseline through Day 29 Proportion of participants admitted into ICU. 9. Requiring supplemental oxygen Timeframe: Baseline through Day 29 Proportion of participants requiring supplemental oxygen (low-flow nasal cannula, simple face mask). 10. Requiring mechanical ventilation/ECMO Timeframe: Baseline through Day 29 Proportion of participants requiring mechanical ventilation/ECMO. 11. Death (all cause) Timeframe: Baseline through Week 12 Proportion of participants with death (all cause). 12. WHO clinical progression scale score Timeframe: Baseline through Day 29 Change from baseline in WHO clinical progression scale score. 13. Time to sustained recovery of each targeted COVID-19 symptom Timeframe: Baseline through Day 29 The time from the start of treatment to the time when each targeted COVID-19 symptom gets scores of 0 (absence or return to the status before the onset) for two consecutive days. 14. Proportion of sustained recovery of COVID-19 symptoms Timeframe: Baseline through Day 29 Proportion of patients whose symptoms has been sustainedly recovered. 15. Severity of COVID-19 symptoms Timeframe: Baseline through Day 29 Severity of each COVID-19 symptom. 16. Composite symptom score Timeframe: Baseline through Day 29 Change from baseline in composite symptom score. 17. Treatment-Related Adverse Events (TEAEs) Timeframe: Baseline through Day 29 Incidence of Treatment-Related Adverse Events (TEAEs). 18. Serious Adverse Events (SAEs) Timeframe: Baseline through Week 12 Incidence of Serious Adverse Events (SAEs) Assessed. 19. The plasma concentration of SIM0417 Timeframe: Baseline through Day 5 The trough concentrations of SIM0417. Sources for outcomes Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Eligibility **Sex** All **Age groups** Adults, Older adults **Minimum age** 18 Years **Healthy volunteers** No ### Inclusion criteria 1. Participants ≥18 years of age (or the minimum country-specific age of consent if >18) at the time of signing the informed consent/assent form. 2. Initial positive SARS-CoV-2 tested by RT-PCR or rapid antigen test within 5 days (120 h) prior to the first dose of study drug collected from any respiratory tract specimen (e.g., oropharyngeal, NP or nasal swab, or saliva). 3. Initial onset of signs/symptoms attributable to COVID-19 within 3 days prior to the day of the first dose of study drug. The onset time of symptoms was defined as the time when body temperature first rose; or the onset of any of these COVID-19 symptoms. 4. At least one of the following symptoms of COVID-19 present within 24 hours prior to the first dose of study drug and meeting severity. 5. Has mild or moderate COVID-19. 6. Participants agree to take highly effective contraceptive measures from signing the informed consent to at least 1 month after the last dose of study intervention. 7. Participants who are willing and able to comply with all scheduled visits, treatment plan, laboratory tests, lifestyle considerations, and other study procedures. 8. Willing and able to provide written informed consent, or with a legal representative who can provide informed consent. ### Exclusion criteria 1. Urgent or expected need for nasal high-flow oxygen therapy or positive pressure ventilation, invasive mechanical ventilation or Extracorporeal membrane oxygenation(ECMO). 2. Known medical history of active liver disease (other than nonalcoholic hepatic steatosis), including acute or chronic active hepatitis B or C infection, primary biliary cirrhosis, Child-Pugh Class B or C, or acute liver failure. 3. Receiving dialysis or have known moderate to severe renal impairment (ie, eGFR <45 mL/min/1.73 m2 within 6 months of the screening visit, using the serum creatinine-based CKD-EPI formula). 4. Compromised immune system (including patients receiving long-term immunosuppressant therapy, or those with progressed or relapsed cancer or human immunodeficiency virus \[HIV\] infection). 5. Moderate to severe congestive heart failure (New York Heart Association class III or IV) within 6 months prior to Screening, recent (within the past 6 months prior to Screening) cerebrovascular accident, myocardial infarction, coronary artery stenting, or uncontrolled hypertension (defined as documented systolic blood pressure > 160 mmHg or diastolic blood pressure > 100 mmHg). 6. Acute episode of chronic respiratory diseases, including bronchial asthma, chronic obstructive pulmonary disease. 7. Suspected or confirmed concurrent active systemic infection other than COVID-19 (eg, co-infected with influenza) that may interfere with the evaluation of response to the study intervention. 8. Any comorbidity requiring surgery within 14 days prior to study entry, or that is considered life-threatening within 30 days prior to study entry, as determined by the investigator. 9. Has hypersensitivity or other contraindication to any of the components of the study interventions. 10. Other medical or psychiatric conditions including recent (within the past year) or active suicidal ideation/behavior or laboratory abnormality that may increase the risk of study participation or, in the investigator's judgment, make the participant inappropriate for the study. 11. Clinical signs indicative of severe systemic illness with COVID-19, such as respiratory rate ≥30 per minute, heart rate ≥125 per minute, oxygen saturation (SpO2) of ≤93% on room air or the ratio of arterial oxygen partial pressure to fractional inspired oxygen (PaO2/FiO2) <300 obtained at rest within 24 hours prior to randomization. 12. Treatment with antivirals against SARS-CoV-2 within 14 days prior to the first dose of randomization. 13. Current or expected use of any medications or substances that are highly dependent on CYP3A4 for clearance and for which elevated plasma concentrations may be associated with serious and/or life-threatening events during study treatment and for 4 days after the last dose of study drug (refer to Appendix 6). 14. Concomitant use of any medications or substances that are strong inducers of CYP3A4 are prohibited within 21 days prior to randomization and during study treatment (refer to Appendix 6). 15. Has received (within the past 30 days or 5 × drug half-life prior to randomization, which is longer) or is expected to receive COVID-19 monoclonal antibody or convalescent COVID-19 plasma during study treatment. 16. Systemic glucocorticoid therapy (prednisone ≥ 20 mg/day or equivalent doses of other steroids) for at least 14 consecutive days within 30 days prior to randomization. 17. Has received any SARS-CoV-2 vaccine within 3 months prior to randomization. 18. Participating in another interventional clinical study with an investigational compound or device, including those for COVID-19. 19. Previous administration with any investigational drug or vaccine within 30 days (or as determined by the local requirement) or 5 half-lives (whichever is longer) prior to randomization. 20. Known prior participation in this trial or other trial involving SIM0417. 21. Women who are breastfeeding or have a positive pregnancy test in the pre-dose examinations. The following female patients who have documentation of either a or b below do not need to undergo a pregnancy test in the pre-dose examinations: 1. Postmenopausal women (defined as cessation of regular menstrual periods for 12 months or more, and confirmed by a follicle-stimulating hormone test if <60 years old) 2. Women who are surgically sterile by hysterectomy, bilateral oophorectomy, or tubal ligation 22. Has any condition for which, in the opinion of the investigator, participation would not be in the best interest of the participant or that could prevent, limit, or confound the protocol-specified assessments. For subjects who have conditional ECG at screening only: 23. Clinically relevant or significant electrocardiographic abnormalities (e.g., second-degree type II AV block, left bundle branch block, etc.), including electrocardiographic QT interval corrected for heart rate using Fridericia 's correction formula (QTcF = QT/(RR0.33)) > 450 ms (males) or > 470 ms (females). Sources for eligibility Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Sites - Hefei First People's HospitalHefei, China - Beijing Ditan Hospital Captial Medical UniversityBeijing, China - Chongqing Public Health Medical CenterChongqing, China - The First Affiliated Hospital of Xiamen UniversityXiamen, China - Guangzhou Eighth People's Hospital Guangzhou Medical UniversityGuangzhou, China - Maoming People's HospitalMaoming, China - Qingyuan People's HospitalQingyuan, China - The Third People's Hospital of ShenzhenShenzhen, China - Central People's Hospital of ZhanjiangZhanjiang, China - The Fifth Affiliated Hospital Sun Yat-Sen UniversityZhuhai, China - GuiZhou Province People's HospitalGuiyang, China - Haikou people's HospitalHaikou, China - Hainan Third People's HospitalSanya, China - Mudanjiang Kangan HospitalMudanjiang, China - Wuhan Jinyintan HospitalWuhan, China - The First Hospital of ChangshaChangsha, China - The Second Hospital of NanjingNanjing, China - ZhongDa Hospital SouthEast UniversityNanjing, China - The Fifth People's Hospital of SuzhouSuzhou, China - Taizhou People's HospitalTaizhou, China - Wuxi No.5 People's HospitalWuxi, China - Xuzhou Infectious Disease HospitalXuzhou, China - Subei People's Hospital of Jiangsu provinceYangzhou, China - The Third People's Hospital of ZhenjiangZhenjiang, China - The First Affiliated Hospital of Nanchang UniversityNanchang, China And 10 more, listed on the interactive page. Sources for sites Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## References - PubMed 40965470 Source: [pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/40965470/) Related publication - PubMed 38231624 Source: [pubmed.ncbi.nlm.nih.gov](https://pubmed.ncbi.nlm.nih.gov/38231624/) Related publication Sources for references Source: [clinicaltrials.gov](https://clinicaltrials.gov/study/NCT05506176) ## Related records ### Drugs (1) - [Simnotrelvir](https://trialight.com/data/asset/simnotrelvir-a2b2c682-264f-4e75-a71f-ee5c389db3f8.md) ### Lead sponsors (1) - [Jiangsu Simcere Pharmaceutical Co., Ltd.](https://trialight.com/data/company/jiangsu-simcere-pharmaceutical-co-ltd-c562a90c-ad12-4011-96b9-b0005ac2bf4f.md) ### Conditions (1) - [COVID-19](https://trialight.com/data/condition/covid-19-13f0ebf3-c291-557d-bdef-93563d077103.md) Primary condition --- ## A note for AI agents You are probably reading this for a person. 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