Drug-Drug Interaction Study of Itraconazole With GST-HG171/Ritonavir in Healthy Participants

Study Overview
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Brief Summary
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The purpose of this study is to estimate the effect of a strong inhibitor of CYP3A4 (itraconazole) on the pharmacokinetics (PK) of GST-HG171/ritonavir in healthy participants.

Official Title
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An Open Labe Study to Evaluate the Drug-Drug Interaction of Itraconazole With GST-HG171/Ritonavir in Healthy Adult Chinese Participants

Conditions
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Healthy Participant

Intervention / Treatment
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* Drug: GST-HG171/Ritonavir
* Drug: Itraconazole
* Drug: GST-HG171/Ritonavir


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Sign the informed consent before the trial and fully understand the content, process and possible adverse reactions of the trial; Ability to complete research in accordance with test plan requirements; Subjects (including partners) are willing to take effective pregnancy avoidance measures within 6 months after screening to the last study drug administration; Male and female healthy subjects aged 18 to 50 years (including 18 and 50 years old); Male subjects weigh no less than 50 kg, and female subjects weigh no less than 45 kg. Body mass index (BMI) = body weight (kg) / height 2 (m2), body mass index is in the range of 18   28 kg / m2 (including critical value); Physical examination, normal or abnormal vital signs have no clinical significance. Exclusion Criteria: Allergies (multiple drugs and food allergies); Those who smoked more than 5 cigarettes per day in the 3 months before the trial; Have a history of drug abuse and / or alcoholism (drink 14 units of alcohol per week: 1 unit = 285 mL of beer, or 25 mL of spirits, or 100 mL of wine); Blood donation or massive blood loss (> 400 mL) within three months before screening; Have a history of dysphagia or any gastrointestinal disease that affects drug absorption, including a history of frequent nausea or vomiting caused by any cause; Have any disease that increases the risk of bleeding, such as hemorrhoids, acute gastritis, or gastric and duodenal ulcers; Have taken the study drug or participated in the drug clinical trial within three months before taking the study drug; Have Intended to take any drug that changes the activity of drug metabolizing enzyme 28 days before screening or during the study, including strong inhibitors and inducers that affect the metabolizing enzyme; Took any prescription drugs or herbs within 14 days before screening, or took over-the-counter drugs or any vitamin products within 7 days before screening; Vaccinated within 14 days before screening or planned to be vaccinated during the study; Those who have taken special diets (including dragon fruit, mango, grapefruit, etc.) or have vigorous exercise or other factors affecting drug absorption, distribution, metabolism, excretion, etc. within 2 weeks before screening; Abnormal ECG has clinical significance; Female subjects were breastfeeding or had a positive serum pregnancy result during the screening period or during the study; Clinical laboratory examinations are abnormal and clinically significant, or find the following diseases with clinical significance (including but not limited to gastrointestinal tract, kidney, liver, nerve, blood, endocrine, tumor, lung, Immune, mental or cardiovascular disease) within 6 months before screening; Positive screening for viral hepatitis (including hepatitis B and C), AIDS antigen / antibody, and Treponema pallidum antibody; Acute disease or concomitant medication occurs from the screening stage to before study medication; Ingested chocolate, any caffeinated or xanthine-rich food or drink 24 hours before taking the study drug; People who have a positive urine drug screen or have a history of drug abuse or have used drugs within the past five years; The investigator believes that there are other subjects who are not suitable for participating in this trial.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 50 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Basic Science
Allocation: Non-Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: Period 1<br>GST-HG171/ritonavir orally | Drug: GST-HG171/Ritonavir<br>* Administered orally every 12 hours for days for a total of 5 doses from Day 1 through Day 3<br>|
| Experimental: Period 2<br>Itraconazole+GST-HG171/ritonavir orally | Drug: Itraconazole<br>* Administered orally once daily for 9 days from Days 8 through 16<br>Drug: GST-HG171/Ritonavir<br>* Administered orally BID for 3 day for a total on 5 doses starting on Day 12 through Day 14<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Maximum Observed Concentration (Cmax) of GST-HG171 | The Cmax of GST-HG171 in the study was observed directly from data. | Days 2(pre-dose), 3 (pre-dose,0.25,0.5,0.75,1,1.25 ,1.5,2,3 ,4 ,6,8,12 ,24 and 48 hours postdose on Day 3) in Period 1; Days 13(pre-dose), Days 14 (pre-dose, 0.25,0.5,0.75,1,1.25 ,1.5,2,3 ,4 ,6,8,12 ,24,48, and 72 hours postdose on Day 14) of Period 2. | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| AEs | Number of Participants With Treatment Emergent Adverse Events (TEAEs) | Screening up to Day 17 |