A Phase 1 interventional study of Sudapyridine and Itraconazole in Rifampicin-Resistant Pulmonary Tuberculosis Patients, sponsored by Shanghai Jiatan Pharmatech Co., Ltd. Not yet recruiting. Open to participants aged 18 Years to 50 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-02-12.
Sponsored by Shanghai Jiatan Pharmatech Co., Ltd · Phase 1, Interventional, and Treatment
The goal of this clinical trial is to learn how Sudapyridine (WX-081) tablets interact with other drugs and how food intake affects its pharmacokinetics in healthy Chinese adults. The main questions it aims to answer are:
How does itraconazole (a strong CYP3A inhibitor) affect the pharmacokinetics of Sudapyridine? How does rifampin (a strong CYP3A inducer) affect the pharmacokinetics of Sudapyridine? How does food intake influence the pharmacokinetics of Sudapyridine?
Participants will:
Take Sudapyridine alone, with itraconazole, with rifampin, and under fed and fasting conditions based on a predefined sequence.
Attend multiple clinic visits for blood sample collection and safety evaluations.
Researchers will compare the pharmacokinetic parameters of Sudapyridine under these conditions to determine the impact of drug-drug interactions and food.
This open-label, single-center, interventional clinical study aims to assess the pharmacokinetics, safety, and tolerability of Sudapyridine (WX-081) tablets when administered with itraconazole, rifampin, and under fed and fasting conditions in healthy Chinese adults.
The primary objectives are:
To evaluate the effects of itraconazole, a potent CYP3A inhibitor, on the pharmacokinetics of Sudapyridine.
To assess the impact of rifampin, a strong CYP3A inducer, on the pharmacokinetics of Sudapyridine.
To investigate the influence of food on the pharmacokinetics of Sudapyridine. The study will adopt a crossover design with participants assigned to various treatment sequences to ensure comprehensive evaluation of the drug-drug interactions and food effects. The secondary objectives include determining safety profiles and providing key insights for dose adjustments and clinical use of Sudapyridine in subsequent trials.
The results from this trial will contribute to understanding the pharmacokinetic and safety characteristics of Sudapyridine, supporting its further clinical development.
319 studies on the registry are indexed under Tuberculosis, Pulmonary; 71 are open to participants now.
This study's planned enrollment of 16 is below the median of 146 across 227 interventional studies indexed under Tuberculosis, Pulmonary.
Browse Tuberculosis, Pulmonary studies →Shanghai Jiatan Pharmatech Co., Ltd is the lead sponsor of 11 studies on the registry; 7 are open to participants now.
Counted across the registry records on this site, refreshed daily.
Go through the criteria one by one — yes, no or not sure — and take the list to your doctor or the study team. Kept in this browser only.
Male participants must weigh at least 50 kg, and female participants at least 45 kg. (BMI) should be between 18 and 28 kg/m² (including 18 and 28), and weight (kg)/height (m²).
Participants must undergo a comprehensive physical examination, 12-lead , vital signs assessment, and laboratory tests. Results must be normal or deemed clinically insignificant by the investigator, meeting the following:
12-lead ECG must show ≤ 450 ms (≤ 200 ms for A Study), QRS duration ≤ 120 ms, and PR interval ≤ 200 ms. PR elongation may allow entry if deemed clinically insignificant by the investigator.
Participants (including their partners) must agree to use effective from the date of screening to 6 months after the last study drug administration and must avoid sperm/egg donation during this period.
Exclusion Criteria:
Participants with conditions that increase the risk of , or with a family history of sudden cardiac death (\<40 years old) or other hereditary diseases.
laboratory abnormalities at screening, including:
/AST/ values exceeding 2 times the . Estimated (ClCr) \< 60 mL/min. Participants with urinary system disorders. Use of any prescription or over-the-counter drugs, supplements, or herbal products within 2 weeks before dosing that may affect the study evaluation.
Known allergy to Sudapyridine (WX-081) or other related compounds. Participants positive for surface antigen (HBsAg), anti- virus antibody (Anti-HCV), anti- antibody, or syphilis antibody.
History of alcohol or drug abuse:
Alcohol: ≥14 units per week; a unit equals 285 mL beer or 100 mL wine. Participants who smoke more than 5 cigarettes/day and cannot stop during the study.
Donation of blood exceeding 400 mL within 1 month prior to the study. Participants enrolled in other drug trials within 3 months before the study. Use of or P-gp inhibitors/inducers within 28 days prior to the study (e.g., itraconazole, rifampin).
Unwillingness to avoid grapefruit, pomelo, or other food/drinks affecting drug metabolism during the study.
Participants with a history of intestinal surgery affecting drug absorption. Women who are pregnant or lactating or intending to become pregnant. Participants deemed unsuitable by the investigator due to other reasons.
Underlined terms in the criteria open these too. Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
BMI (body mass index)
Weight in kilograms divided by height in metres squared. Example: 70 kg and 1.75 m gives 70 ÷ (1.75 × 1.75) ≈ 22.9.
What counts as overweight or obesity differs between countries (some use lower cut-offs), so go by the range the study states.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ECG (electrocardiogram)
A recording of the heart’s electrical activity, taken with stickers on the chest, arms and legs. It takes a few minutes and does not hurt.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
QT and QTc
On an ECG, the QT interval is the time the heart’s lower chambers take to activate electrically and recover in each beat. QTc is that time adjusted for heart rate (QTcF by Fridericia’s formula, QTcB by Bazett’s). Some medicines lengthen it, and a long QTc can raise the risk of a dangerous heart rhythm.
The study may name a correction formula and a limit in milliseconds, often around 450–480.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Contraception
Ways of preventing pregnancy. “Highly effective” methods fail less than 1% of the time a year when used correctly — for example an IUD or an implant.
Criteria usually say which methods count and how long to keep using them after the last dose, sometimes for male participants too. Some studies accept a partner’s vasectomy if it was confirmed successful and that person is the participant’s only sexual partner.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Clinically significant
Judged by the study doctor to matter for your health or for the study. It is a doctor’s decision, so ask the study team if you are unsure whether something counts.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ALT and AST (liver enzymes)
Two enzymes measured in a routine blood test of the liver. Higher levels can mean the liver is under strain or damaged. SGPT and SGOT are older names for ALT and AST.
Criteria usually give a limit as a multiple of the upper limit of normal (ULN), often higher when cancer has spread to the liver.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Bilirubin
A yellow substance made when red blood cells are broken down, which the liver clears. A high level can mean a problem with the liver or the bile ducts.
Criteria often allow more for people with Gilbert’s syndrome, a harmless inherited condition that raises bilirubin.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
ULN (upper limit of normal)
The top of the normal range for a blood test, as set by the laboratory that runs it. Each lab prints its own range next to your result.
“≤ 2.5 × ULN” means the result can be up to two and a half times that top value.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Creatinine clearance (CrCl)
How quickly the kidneys clear creatinine, a waste product, from the blood. A study may estimate it from a blood test with age, weight and sex (often by the Cockcroft–Gault formula), or measure it using blood and urine collected over a set time. Given in mL/min; higher is better.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis B tests
Hepatitis B is a virus that infects the liver. These are separate tests: HBsAg positive usually means a current infection (a recent vaccination can briefly cause it too); total anti-HBc (HBcAb) positive means an infection now or in the past; HBV DNA measures how much virus is in the blood.
Some studies accept a past infection if HBV DNA is undetectable, sometimes with antiviral medicine during the study. Check what this study allows.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Hepatitis C tests
Hepatitis C is a virus that infects the liver. An HCV antibody test can stay positive after an infection has cleared (and is occasionally positive without one); an HCV RNA test shows whether the virus is there now.
After treatment, hepatitis C counts as cured when HCV RNA is still undetectable 12 weeks or more after the treatment ended. Studies often accept people cured this way.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
HIV
The human immunodeficiency virus, which weakens the immune system.
Many studies now accept people whose HIV is controlled on treatment, judged by the viral load and the CD4 count. Check the limits this study sets.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
CYP3A (CYP3A4) inhibitors and inducers
CYP3A is a group of enzymes, mainly CYP3A4, in the liver and gut that break down many medicines. Some medicines, supplements and foods (grapefruit, St John’s wort) slow them down or speed them up, which changes how much of a study drug stays in the body.
Studies list them so they can be avoided or switched; bring a list of everything you take, including supplements.
Explained by clinicaltrials.gg, not part of the registry record. The study team decides who can take part.
Participants will receive Sudapyridine (WX-081) tablets orally at a specified dose once daily for 10 days (in Study A and Study B) or once under fasting and fed conditions (in Study C). Pharmacokinetic sampling and safety assessments will be conducted.
Drug: Sudapyridine
Participants will receive Sudapyridine (WX-081) tablets orally at a specified dose once daily for 7 days while co-administered with itraconazole (Study A) or rifampin (Study B). Pharmacokinetic sampling and safety assessments will be conducted.
Drug: Sudapyridine · Drug: Itraconazole · Drug: Rifampin
In Study A, Cycle 1 (D1-D10): Participants will take Sudapyridine (WX-081) 300 mg once daily after breakfast. Cycle 2 (D11-D14): Participants will take Sudapyridine 300 mg once daily after breakfast with itraconazole 200 mg daily; an additional itraconazole dose (200 mg) will be given after dinner on D11. In Study B, Cycle 1 (D1): Participants will take Sudapyridine 450 mg as a single dose after breakfast. Cycle 2 (D22): Participants will take Sudapyridine 450 mg with rifampin 600 mg daily (D15-D27). In Study C, Cycle 1 (D1): Sudapyridine 450 mg will be given fasting; Cycle 2 (D15): after a high-fat breakfast.
In Study A: Participants will receive itraconazole capsules at 200 mg orally once daily after breakfast during Cycle 2 (D11-D14). An additional dose of itraconazole (200 mg) will be administered after dinner on D11.
In Study B: Participants will receive rifampin capsules at 600 mg orally once daily under fasting conditions during Cycle 2 (D15-D27).
Peak Plasma Concentration (Cmax) of Sudapyridine (WX-081)
Measurement of the maximum observed plasma concentration of Sudapyridine (WX-081) when administered alone, with itraconazole, with rifampin, and under fasting and fed conditions.
Time frame: From pre-dose Day 1 to Day 7 until post-dose Day 15 to Day 21
Time to Maximum Plasma Concentration (Tmax) of Sudapyridine (WX-081)
Measurement of the time to reach the maximum observed plasma concentration of Sudapyridine (WX-081) when administered alone, with itraconazole, with rifampin, and under fasting and fed conditions.
Time frame: From pre-dose Day 1 to Day 7 until post-dose Day 15 to Day 21
Area Under the Plasma Concentration-Time Curve (AUC0-t and AUC0-∞) of Sudapyridine (WX-081)
Measurement of the area under the plasma concentration-time curve from time 0 to the last measurable concentration (AUC0-t) and from time 0 extrapolated to infinity (AUC0-∞) of Sudapyridine (WX-081) when administered alone, with itraconazole, with rifampin, and under fasting and fed conditions.
Time frame: From pre-dose Day 1 to Day 7 until post-dose Day 15 to Day 21
Number of Participants with Treatment-Emergent Adverse Events (TEAEs) as Assessed by CTCAE v4.0
Assessment of treatment-emergent adverse events (TEAEs) using the Common Terminology Criteria for Adverse Events (CTCAE) version 4.0 to evaluate safety and tolerability.
Time frame: From Day 1 to 7 days post-last dose (up to 35 days, depending on the study part).
No study locations are listed for this record.
Start is estimated for May 2025; primary completion for Oct 2025, 5 months later.
Of 13 phase 1 interventional studies under Tuberculosis, Pulmonary, half reached primary completion within 3 months of starting (the median), counting those still running; a quarter within 2 and three quarters within 13. This study's planned 5 months is above that.
How these figures are worked out, and which studies are left out of them.
This study is not yet recruiting, as verified in Feb 2025. You cannot join it, but the record below documents what was studied.
Get an email when the registry record changes — status, dates, results — or when someone posts here.
Sign in to followQuestions and observations about this study, from anyone following it. Not medical advice, and not a channel to the study team — their contact details are on the registry record.
Sign in to join the discussion. Reading takes no account; posting does. You choose a display name, and a pseudonym is the default.
Nothing here yet. If you are running this trial, taking part in it, or weighing whether to, this is the place to say so.
Studies of the drug tested here: Sudapyridine
Shanghai Jiatan Pharmatech Co., Ltd