About this trial
The goal of this clinical trial is to learn if troxerutin works to prevent thrombotic events in mild or severe COVID-19 patients. It will also learn about the safety of troxerutin. The main questions it aims to answer are:
* Does troxerutin lower the number of thrombotic events in participants? * What medical problems do participants have when taking troxerutin? Researchers will compare troxerutin to a placebo (a look-alike substance that contains no drug) to see if troxerutin works to prevent thrombotic events in COVID-19 patients.
Participants will:
* Take troxerutin or a placebo every day for 7 days. * Visit the clinic at the first, fourth, seventh and 28th days after enrollment for checkups and tests * Keep a diary of their symptoms and the number of times of thrombotic events, bleeding events and type II HIT-related thrombocytopenia
Eligibility criteria
This trial does not accept healthy volunteersQualifiers
Respiratory rate ≥30 breaths/min
Severe respiratory distress
Oxygen saturation (SpO₂) ≤90% in room air
Progressive deterioration of clinical symptoms with lung imaging showing significant progression of lesions (>50%) within 24 to 48 hours.
Disqualifiers
Pregnant or lactating women.
Postpartum (within 6 weeks).
Extreme weight (100 kilograms).
Clinical need for heparin therapy.
Trial design
Parallel
Treatments tested in this trial
Troxerutin
DrugOral troxerutin tablets, with a dosage of 3 tablets (60 mg/tablet) orally, twice daily
Placebo
DrugOral placebo tablets, with a dosage of 3 tablets (60 mg/tablet) orally, twice daily
placebo + low molecular weight heparin
Drug2000 IU LMWH once a day + Oral placebo tablets, with a dosage of 3 tablets (60 mg/tablet) orally, twice daily
troxerutin + low molecular weight heparin
Drug2000 IU LMWH once a day + Oral troxerutin tablets, with a dosage of 3 tablets (60 mg/tablet) orally, twice daily
Treatment groups
Trial outcomes
Primary outcomes
Overall number of patients in prothrombotic state through 7 days
Assess coagulation-related parameters in patients' blood, including platelet count, prothrombin time (PT), antithrombin III activity (ATIIIa), plasma fibrinogen concentration (Fbg), and quantitative D-dimer.Patients with one or more indicators in the abnormal range, including PT \< 11s (reference interval: 11-14 s), FG \> 4g/L (reference interval: 2-4 g/L), D-dimer \< 0.5 μg/mL (reference interval: 0-0.5 μg/mL), are considered in a prothrombotic state.
Secondary outcomes
Tolerability of anticoagulation therapy
Percentage of patients experiencing at least one major bleeding event (MBE) as defined by the International Society on Thrombosis and Haemostasis (ISTH) by day 28.
Adverse event
Percentage of patients experiencing at least one adverse event above grade 2
Sponsors and contacts
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Westlake University
Lead sponsor
Shaoxing Central Hospital
Collaborator
Affiliated Hangzhou First People's Hospital, School of Medicine, Westlake University
Collaborator