Pharmacokinetics and Bioequivalence of XC8 10 mg and 40 mg Tablets in Fasted Volunteers

Study Overview
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Brief Summary
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Comparative study of the pharmacokinetics of XC8, film-coated tablets, 10 mg and XC8, film-coated tablets, 40 mg, when administered once in equal doses (40 mg) on an empty stomach in healthy volunteers.

Official Title
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A Randomized, Open-label, Cross-over Study in Two Periods and Two Sequences to Evaluate the Comparative Pharmacokinetics and Bioavailability of XC8, 10 mg Film-coated Tablets, and XC8, 40 mg Film-coated Tablets, When Taken Once in Equal Doses (40 mg) on an Empty Stomach in Healthy Volunteers

Conditions
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Influenza, Respiratory Viral Infection

Intervention / Treatment
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* Drug: XC8


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Voluntary and handwritten informed consent form signed by a healthy volunteer to participate in the study prior to any of the study procedures; Men and women between the ages of 18 and 45 years (inclusive) of Caucasian race; Verified diagnosis healthy (absence of abnormalities according to clinical, laboratory, instrumental methods of examination, stipulated by the protocol); Blood pressure (BP): systolic blood pressure (SBP) of 99 to 129 mmHg (inclusive), diastolic blood pressure (DBP) of 70 to 89 mmHg (inclusive); Heart rate (HR) from 60 to 89 beats/min (inclusive); Respiratory rate (HR) from 12 to 20 per minute (inclusive); Body temperature from 36°C to 36.9°C (inclusive); Body mass index (BMI) of 18.5 kg/m2 ≤ BMI ≤ 30 kg/m2, with a body weight of ≥ 55 kg for men and ≥ 45 kg for women; Consent to use adequate methods of contraception throughout the study and for 30 days after completion; for women of preserved reproductive potential, a negative urine pregnancy test result. Exclusion Criteria: A history of allergy; Drug intolerance to the active substance XC8 (N-[2-(1H-imidazol-4-yl)-ethyl]-6-oxo-δ-lactam) and/or excipients contained in the studied drug in the anamnesis; Chronic diseases of the kidneys, liver, gastrointestinal tract (GIT), cardiovascular, lymphatic, respiratory, nervous, endocrine, musculoskeletal, genitourinary and immune systems, as well as skin, blood and vision; History of gastrointestinal surgery (except appendectomy at least 1 year prior to screening); Diseases/conditions that, in the opinion of the investigator, may affect absorption, distribution, metabolism or excretion of the investigational drugs; Acute infectious disease less than 4 weeks prior to screening; Taking medications that significantly affect hemodynamics and medications that affect liver function (barbiturates, omeprazole, cimetidine, etc.) less than 2 months prior to screening; Regularly taking an medicine less than 2 weeks before screening and taking a single medicine less than 7 days before screening; Donating blood or plasma less than 3 months before screening; Use of hormonal contraceptives (in women) less than 2 months before screening; The use of depot injections of any drug less than 3 months before screening; Pregnancy or lactation; positive urine pregnancy test for women of preserved reproductive potential; Women of preserved reproductive potential with a history of unprotected intercourse within 30 days prior to study drug administration with an unsterilized partner; Participation in another clinical trial less than 3 months prior to screening or concurrently with the present study; Taking more than 10 units of alcohol (1 unit of alcohol is equivalent to 330 mL of beer, 150 mL of wine or 40 mL of spirits) in the week in the last month before inclusion in the study or anamnestic evidence of alcoholism, drug addiction, drug abuse; Smoking more than 10 cigarettes per day currently, or a history of smoking the specified number of cigarettes during the 6 months prior to screening; disagreement to abstain from smoking for the duration of the hospital stay; Consumption of alcohol, caffeine, and xanthine-containing products 7 days prior to the study drug admission; Consumption of citrus fruits, cranberries and products containing them, preparations or products containing St. John's wort - 7 days before admission to the study drug; Dehydration due to diarrhea, vomiting, or other reason within the last 24 hours prior to study drug administration. Positive blood tests for antibodies to human immunodeficiency virus (HIV) 1 and 2, antibodies to Treponema pallidum antigens, hepatitis B surface antigen (HBsAg), antibodies to hepatitis C virus antigens at screening; Rapid tests of biomaterial (nasopharyngeal and/or oropharyngeal swab) for Severe Acute Respiratory Syndrome Coronavirus 2 antigen (SARS-CoV-2), Coronavirus Disease 2019 (COVID-19) at screening; Clinically significant abnormalities on an electrocardiogram (ECG) history and/or at screening; Positive urinalysis for narcotics and powerful drugs at screening; Positive breath alcohol vapor test at screening. Scheduling an inpatient stay at the time of the study, for any reason other than hospitalization required by this protocol; Inability or inability to meet the requirements of the protocol, perform the procedures prescribed by the protocol, follow the diet, activity regimen. Belonging to a vulnerable group of volunteers: students of higher and secondary medical, pharmaceutical and dental schools, junior staff of clinics and laboratories, employees of pharmaceutical companies, servicemen and prisoners, persons in nursing homes, low-income and unemployed, national minorities, homeless people, vagrants, refugees, persons under guardianship or custody, and persons unable to give consent, and law enforcement officers; Other conditions that, in the opinion of the Researcher, prevent the inclusion of the volunteer in the study or that might lead to early withdrawal of the volunteer from the study, including fasting or a special diet (e.g. vegetarian, vegan, restricted salt intake) or a special lifestyle (night work, extreme physical activity). Withdrawal Criteria: The volunteer's refusal to further participate in the study; Failure of the volunteer to comply with the rules of participation in the study (skipping study procedures, independent use of drugs prohibited in the study, violation of dietary and lifestyle restrictions, etc.); Occurrence of causes/occurrence during the study of situations that threaten the safety of the volunteer (e.g., hypersensitivity reactions, etc.); Volunteers selected for the study in violation of the inclusion/inclusion criteria; Development of severe adverse event in the volunteer during the study; The volunteer is undergoing or requires treatment that may affect the pharmacokinetic parameters; Missing 2 or more consecutive blood samples or 3 or more blood samples during the same Study Period; Occurrence of vomiting/diarrhea within 4 hours of study drug administration; Positive urine test for narcotics and powerful drugs; Positive breath alcohol vapor test. Positive pregnancy test in women; Positive test for COVID-19; The occurrence in the course of the study of other reasons that prevent the study according to the protocol.

Ages Eligible for Study
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Minimum Age: 18 Years
Maximum Age: 45 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: Other
Allocation: Randomized
Intervention Model: Crossover Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Experimental: RT-sequence<br>Group 1 (12 volunteers, RT sequence) will take 4 tablets of XC8, 10 mg, in Period 1 and 1 tablet of XC8, 40 mg, in Period 2 | Drug: XC8<br>* A single dose of R or T drug in each of 2 periods of the study in fasted conditions<br>|
| Experimental: TR-sequence<br>Group 2 (12 volunteers, sequence TR) will take 1 tablet of XC8, 40 mg, in Period 1 and 4 tablets of XC8, 10 mg, in Period 2. | Drug: XC8<br>* A single dose of R or T drug in each of 2 periods of the study in fasted conditions<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Pharmacokinetics - Cmax | Maximum plasma concentration (Cmax) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - tmax | Time to reach Cmax (tmax) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - AUC0-t | Area under the plasma concentration-time curve from time 0 to t (AUC0-t) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - AUC0-inf | Area under the plasma concentration-time curve from time 0 to infinity (AUC0-inf) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - AUCextr | Extrapolated AUC, defined as (AUC0-inf - AUC0-t)/AUC0-inf | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - t1/2 | Elimination half-life (t1/2) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - kel | Elimination constant (kel) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Pharmacokinetics - MRT | Mean residence time (MRT) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Bioequivalence - ratio of Cmax | Ratio of geometric mean Cmax after intake of R or T (with 90% confidence intervals) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Bioequivalence - ratio of AUC0-t | Ratio of geometric mean AUC0-t after intake of R or T (with 90% confidence intervals) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 
| Bioequivalence - ratio of AUC0-inf | Ratio of geometric mean AUC0-inf after intake of R or T (with 90% confidence intervals) | From 0 to 24 hours (Day 1-2 and Day 8-9) | 

Secondary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Safety and Tolerability: adverse event (AE) number and frequency | Number and frequency of adverse events (AEs) | From the screening (and signing informed consent form) to Day 14 of the study or to an early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: serious adverse event (SAE) number and frequency | Number and frequency of serious AEs (SAEs) | From the screening (and signing informed consent form) to Day 14 of the study or to an early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: vital signs - systolic blood pressure (SBP) | SBP, mmHg | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: vital signs - diastolic blood pressure (DBP) | DBP, mmHg | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: vital signs - respiratory rate (RR) | RR, breaths per minute | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: vital signs - heart rate (HR) | HR, beats per minute | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: vital signs - body temperature | Body temperature, centigrade scale | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: physical examination results | Physical examination will follow the general rules of internal medicine: general examination, examination of mucous membranes and skin, including palpation of lymph nodes, evaluation of the musculoskeletal system, palpation, percussion, and auscultation of the main organ systems (cardiovascular, respiratory, digestive, and urinary systems) will be performed sequentially. The findings (if any) will be reported as the rate of clinically significant findings by each system level assessed. | Screening, from Day 0 to Day 2, from Day 7 to Day 9, and/or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: 12-lead electrocardiogram (ECG) - heart rate | 12-lead ECG (I, II, III, aVR, aVL, aVF, V1-V6) taken while lying down: heart rate (beats per minute) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: 12-lead electrocardiogram (ECG) - PQ interval | 12-lead ECG (I, II, III, aVR, aVL, aVF, V1-V6) taken while lying down: PQ interval (ms) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: 12-lead electrocardiogram (ECG) - QRS complex | 12-lead ECG (I, II, III, aVR, aVL, aVF, V1-V6) taken while lying down: QRS complex (ms) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: 12-lead electrocardiogram (ECG) - corrected QT interval (QTc) | 12-lead ECG (I, II, III, aVR, aVL, aVF, V1-V6) taken while lying down: QTc (ms) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - color | Color of the urine | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - transparency | Transparency of the urine | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - pH | pH of the urine | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - specific gravity | Specific gravity of the urine | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - protein | Protein in the urine (g/L) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis - glucose | Glucose in the urine (mmol/L) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - red blood cells | Red blood cells in the urine (number in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - white blood cells | White blood cells in the urine (number in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - epithelial cells | Epithelial cells in the urine (number in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - cylinders | Cylinders in the urine (number in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - mucus | Mucus in the urine (presence in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: urinalysis (microscopy) - bacteria | Bacteria in the urine (number in sight) | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - hemoglobin | Hemoglobin, g/dL | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - red blood cells | Red blood cells, 10^6/uL | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - hematocrit | Hematocrit, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - platelets | Platelets, 10^3/uL | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - white blood cells | White blood cells, 10^3/uL | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - erythrocyte sedimentation rate | Erythrocyte sedimentation rate, mm per hour | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - neutrophils | Neutrophils, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - lymphocytes | Lymphocytes, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - eosinophils | Eosinophils, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - monocytes | Monocytes, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: complete blood count - basophils | Basophils, % | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - total protein | Total protein in blood serum, g/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - creatinine | Creatinine in blood serum, umol/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - glucose | Glucose in blood serum, mmol/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - total bilirubin | Total bilirubin in blood serum, umol/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - total cholesterol | Total cholesterol in blood serum, mmol/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - alanine transaminase (ALT) | ALT in blood serum, U/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - aspartate transaminase (AST) | AST in blood serum, U/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) | 
| Safety and Tolerability: blood test results - alkaline phosphatase (ALP) | ALP in blood serum, U/L | Screening, Day 2, Day 9 or on early termination visit within the time frame of the study (from Day 0 to Day 14) |