PharmacokineticsPhase 1NCT00779259
Drug - Drug Interaction Study Between Quinine Sulfate and Theophylline
A Phase 1 study testing Theophylline 300mg, Quinine 648 mg and Theophylline 300 mg in people with Pharmacokinetics, run by Mutual Pharmaceutical Company, Inc. at 1 site in United States.
Trial summary
In a prior in vitro study using human hepatocytes quinine was shown to induce the activity of Cytochrome p450 CYP 1A2. The present study will evaluate the extent to which quinine sulfate-related induction of this enzyme effects the pharmacokinetics of theophylline, a sensitive probe drug for the activity of CYP 1A2. Read more about this study
- Who is it for?
- Ages 18 to 45 years, men onlyHealthy volunteers can take part
- Conditions the study is for
- Pharmacokinetics
- What is being tested?
- Theophylline 300mg, Quinine 648 mg and Theophylline 300 mg
- Type of treatment
- Pill or oral medicine
- Could I receive a placebo?
- No, everyone receives an active treatment
- How many people
- 24 participants
- Where
- 1 siteUnited States
- Study dates
- Aug 2007to Sep 2007
- Phase
- Phase 1
- Are there results?
- Yes, posted in the registrySummary in the doctors' view
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 18 to 45 years
- Men only
- Healthy volunteers accepted
- Adult
Who may be able to join
- Medically healthy non-smoking, non-obese (≥ 55kg and within 15% of ideal body weight) adult male volunteers 18-45 years of age
Who cannot join
- Subjects with history or presence of glucose 6 phosphate dehydrogenase deficiency, myasthenia gravis, optic neuritis, glaucoma or significant cardiovascular disease (including hypotension, bradycardia or EKG abnormalities), pulmonary, hepatic, gallbladder or biliary tract, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, psychiatric disease or an active sexually transmitted disease
- Subjects with significant blood loss in the prior 56 days, plasma donation within 7 days , hemoglobin <12.0 g/dl or who have participated in another clinical trial within the prior 30 days
- Subjects with recent (2-year) history or evidence of alcoholism or drug abuse
- Subjects who have used any drugs or substances known to inhibit or induce cytochrome P450 (CYP) enzymes and/or P-glycoprotein within 30 days prior to the first dose and throughout the study
- Subjects who test positive at screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HbsAg), or hepatitis C virus (HCV).
- Subjects who are pregnant or lactating or have hypersensitivity to quinine sulfate, mefloquine, quinidine or hypersensitivity to theophylline or aminophylline.
Trial locations and contacts
1 site in 1 country.
About this study
Official title: A Pharmacokinetic Drug-Drug Interaction Study to Evaluate the Effect of Steady-State Quinine Sulfate on the Pharmacokinetics of Single-Dose Theophylline in Healthy Adult Males
In a prior in vitro study using human hepatocytes quinine was shown to induce the activity of Cytochrome p450 CYP 1A2. The present study will evaluate the extent to which quinine sulfate-related induction of this enzyme effects the pharmacokinetics of theophylline, a sensitive probe drug for the activity of CYP 1A2. It will also evaluate the effect of single-dose theophylline on the pharmacokinetics of steady-state quinine sulfate.
Read the detailed description
This study will evaluate the effect of steady-state quinine sulfate on the pharmacokinetics of single dose theophylline and the effect of single dose theophylline on the pharmacokinetics of steady-state quinine sulfate in healthy adult males under fasting conditions. In this non-blinded, crossover study 24 normal, healthy, non-smoking, non-obese male volunteers will serve as their own controls in two cohorts, one consisting of 8 subjects and one consisting of 16 subjects. On Day 1 after a minimum overnight fast of 10 hours, the 8 study participants in cohort 1 will receive a single oral dose of theophylline (300 mg as an immediate-release oral solution 80 mg/ 15 ml concentration). After a 4 day washout period, the 8 subjects will receive a 648 mg dose of quinine sulfate (2 x 324 mg capsules) every 8 hours (dosing at 7 am, 3 pm and 11 pm daily) beginning with the 3 pm dose on Day 5 and continuing through the morning dose on Day 12. The 8 subjects will be co-administered single oral doses of theophylline (300 mg as an immediate-release oral solution 80 mg/ 15 ml concentration) and quinine sulfate (2 x 324 mg capsules) at 7 am on Day 12. Cohort 2 will be dosed on the basis of safety findings in Cohort 1. If ≥ 50% of the volunteers in cohort 1 do not tolerate the 648 mg dose of quinine sulfate, the second cohort of 16 volunteers will receive a dose of quinine sulfate reduced from 648 mg to 324 mg every 8 hours. In each cohort serial pharmacokinetic blood samples will be drawn at times sufficient to adequately define the pharmacokinetics of theophylline and quinine. Blood samples for the measurement of theophylline plasma concentrations will be collected on Days 1 and 12 prior to dosing and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-dose. Blood samples for the measurement of quinine sulfate plasma concentrations will be collected on Day 11 prior to the morning dose and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, and 8 hours post dose and on Day 12 prior to dosing and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6 and 8 hours post-dose. A further goal of this study is to evaluate the safety and tolerability of this regimen in healthy volunteers. Subjects will be monitored throughout participation in the study for adverse reactions to the study drug and/or procedures. Vital signs (sitting blood pressure and pulse) will be measured prior to the morning dose and at 1, 2 and 4 hours after administration of the morning dose on Days 1, 11 and 12. On Day 5, sitting blood pressure and pulse will be measured prior to the afternoon dose and at 1, 2 and 4 hours after administration of the afternoon dose. ECGs will be collected pre-dose and at 4 hours after the morning dose on study Days 1, 5, 11 and 12. All adverse events whether elicited by query, spontaneously reported or observed by clinic staff will be evaluated by the investigator and reported in the subject's case report form.
- Conditions
- Pharmacokinetics
- Being tested
- Theophylline 300mg, Quinine 648 mg, Theophylline 300 mg
- Keywords
- quinine sulfate, theophylline, drug interactions, cytochrome p450, humans, male, adult
What participants receive
What participants receive. In a randomised study each person is assigned to one group by chance.
Theophylline 300mgDrug
Single doses of theophylline 300 mg as an immediate-release oral solution 80mg/15ml concentration administered alone at 7 am on Day 1 after an overnight fast of at least 10 hours and along with quinine sulfate (2 x 324 mg capsules) at 7am on Day 12 after an overnight fast of at least 10 hours.
Quinine 648 mgDrug
648 mg quinine sulfate(2 x 324 mg capsules) initiated at 3pm on Day 5 and taken every 8 hours through Day 11 and co-administered with theophylline 300 mg as an immediate-release oral solution 80 mg/15 ml concentration at 7am on Day 12.
Theophylline 300 mgDrug
Single doses of theophylline 300 mg as an immediate-release oral solution 80mg/15ml concentration administered alone at 7 am on Day 1 after an overnight fast of at least 10 hours and along with quinine sulfate (2 x 324 mg capsules) at 7am on Day 12 after an overnight fast of at least 10 hours.
Quinine 648 mgDrug
648 mg quinine sulfate(2 x 324 mg capsules) initiated at 3pm on Day 5 and taken every 8 hours through Day 11 and co-administered with theophylline 300 mg as an immediate-release oral solution 80 mg/15 ml concentration at 7am on Day 12.
| Study group | Role | What they receive |
|---|---|---|
| Theophylline alone | Active comparator | baseline theophylline pharmacokinetics Receives: Drug: Theophylline 300mg |
| Quinine alone | Active comparator | baseline quinine pharmacokinetics at steady state Receives: Drug: Quinine 648 mg |
| Theophylline with steady state quinine | Experimental | Theophylline pharmacokinetics in the presence of steady state quinine and quinine pharmacokinetics in the presence of theophylline. Receives: Drug: Theophylline 300 mg; Drug: Quinine 648 mg |
What is being measured
The primary outcome is the main question the study is designed to answer.
Maximum Plasma Concentration(Cmax)
The maximum or peak concentration that the drug reaches in the plasma.
Measured: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose. Serial pharmacokinetic blood samples for quinine collected on Days 11 and 12 before dosing and for 8 hours after the morning dose.
Area Under the Concentration Versus Time Curve From Time 0 to Time t [AUC(0-t)]
The area under the plasma concentration versus time curve beginning from the first dose (time 0) to the last measurable concentration (time t), as calculated by the linear trapezoidal method.
Measured: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose. Serial pharmacokinetic blood samples for quinine collected on Days 11 and 12 before dosing and for 8 hours after the morning dose.
Area Under the Concentration Time Curve From Time 0 Extrapolated to Infinity [AUC(0-∞)].
The area under the plasma concentration versus time curve from time 0 to infinity. AUC(0-∞)was calculated as the sum of the AUC(0-t) plus the ratio of the last measurable plasma concentration to the elimination rate constant.
Measured: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose.
Secondary outcomes (2)
Electrocardiogram (ECG) Evaluation of the Maximum QT Interval Corrected for Heartrate (QTc), Quinine Study Day 11.
The QT interval assesses cardiac repolarization and risk for arrhythmias. It is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle. QTc is the QT interval corrected for heartrate.
Measured: 5 hours - measured 1 hour pre-dose and then at 4 hours after the morning dose on Day 11
Electrocardiogram (ECG) Evaluation of the Maximum QT Interval Corrected for Heartrate (QTc), Theophylline Co-administered With Quinine, Study Day 12.
The QT interval assesses cardiac repolarization and risk for arrhythmias. It is a measure of the time between the start of the Q wave and the end of the T wave in the heart's electrical cycle. QTc is the QT interval corrected for heartrate.
Measured: 5 hours - measured 1 hour pre-dose and then at 4 hours post-dose on Day 12
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted24 Oct 2008 (estimated)
- Study startAug 2007
- Primary completionSep 2007
- Study completionSep 2007
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Posted resultsParticipant flow, outcome measures and adverse events reported by the sponsor.
- Other trials for PharmacokineticsStudies of the same condition, open and under way.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Interventional
- Phase
- Phase 1
- Primary purpose
- Basic science
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Enrolment
- 24 participants (actual)
Sponsor and investigators
- Lead sponsor
- Mutual Pharmaceutical Company, Inc.
- Sponsor type
- Industry (pharma, biotech, devices)
- Investigators
- Matthew Davis, MD, Study chair, Mutual PharmaceuticalBarrie March, MD, Principal investigator, PRACS Institute
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00779259
- Sponsor's protocol ID
- MPC-001-07-1002
- Other IDs
- R07-0738
- Status last verified
- Oct 2009
- First submitted
- 22 Oct 2008
- Last updated
- 28 Oct 2009
- Results posted
- Yes, on ClinicalTrials.gov
- Data monitoring committee
- No
Study at a glance
From the registry record, last updated by the sponsor on 28 Oct 2009. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- A Pharmacokinetic Drug-Drug Interaction Study to Evaluate the Effect of Steady-State Quinine Sulfate on the Pharmacokinetics of Single-Dose Theophylline in Healthy Adult Males
- ClinicalTrials.gov ID
- NCT00779259
- Acronym / sponsor ID
- MPC-001-07-1002
- Conditions
- Pharmacokinetics
- Keywords
- quinine sulfate, theophylline, drug interactions, cytochrome p450, humans, male, adult
- Phase
- Phase 1
- Study type
- Interventional
- Recruitment status
- Completed
- Enrolment
- 24 participants (actual)
- Lead sponsor
- Mutual Pharmaceutical Company, Inc.Industry (pharma, biotech, devices)
- Study start
- Aug 2007
- Primary completion
- Sep 2007 (actual)
- Study completion
- Sep 2007 (actual)
- First posted
- 24 Oct 2008 (estimated)
- Results
- Posted 17 Jul 2009
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In a prior in vitro study using human hepatocytes quinine was shown to induce the activity of Cytochrome p450 CYP 1A2. The present study will evaluate the extent to which quinine sulfate-related induction of this enzyme effects the pharmacokinetics of theophylline, a sensitive probe drug for the activity of CYP 1A2. It will also evaluate the effect of single-dose theophylline on the pharmacokinetics of steady-state quinine sulfate.
Detailed description
This study will evaluate the effect of steady-state quinine sulfate on the pharmacokinetics of single dose theophylline and the effect of single dose theophylline on the pharmacokinetics of steady-state quinine sulfate in healthy adult males under fasting conditions. In this non-blinded, crossover study 24 normal, healthy, non-smoking, non-obese male volunteers will serve as their own controls in two cohorts, one consisting of 8 subjects and one consisting of 16 subjects. On Day 1 after a minimum overnight fast of 10 hours, the 8 study participants in cohort 1 will receive a single oral dose of theophylline (300 mg as an immediate-release oral solution 80 mg/ 15 ml concentration). After a 4 day washout period, the 8 subjects will receive a 648 mg dose of quinine sulfate (2 x 324 mg capsules) every 8 hours (dosing at 7 am, 3 pm and 11 pm daily) beginning with the 3 pm dose on Day 5 and continuing through the morning dose on Day 12. The 8 subjects will be co-administered single oral doses of theophylline (300 mg as an immediate-release oral solution 80 mg/ 15 ml concentration) and quinine sulfate (2 x 324 mg capsules) at 7 am on Day 12. Cohort 2 will be dosed on the basis of safety findings in Cohort 1. If ≥ 50% of the volunteers in cohort 1 do not tolerate the 648 mg dose of quinine sulfate, the second cohort of 16 volunteers will receive a dose of quinine sulfate reduced from 648 mg to 324 mg every 8 hours. In each cohort serial pharmacokinetic blood samples will be drawn at times sufficient to adequately define the pharmacokinetics of theophylline and quinine. Blood samples for the measurement of theophylline plasma concentrations will be collected on Days 1 and 12 prior to dosing and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, 8, 12, 16, 24, 36 and 48 hours post-dose. Blood samples for the measurement of quinine sulfate plasma concentrations will be collected on Day 11 prior to the morning dose and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6, and 8 hours post dose and on Day 12 prior to dosing and at 0.5, 1, 1.5, 2, 2.5, 3, 4, 6 and 8 hours post-dose. A further goal of this study is to evaluate the safety and tolerability of this regimen in healthy volunteers. Subjects will be monitored throughout participation in the study for adverse reactions to the study drug and/or procedures. Vital signs (sitting blood pressure and pulse) will be measured prior to the morning dose and at 1, 2 and 4 hours after administration of the morning dose on Days 1, 11 and 12. On Day 5, sitting blood pressure and pulse will be measured prior to the afternoon dose and at 1, 2 and 4 hours after administration of the afternoon dose. ECGs will be collected pre-dose and at 4 hours after the morning dose on study Days 1, 5, 11 and 12. All adverse events whether elicited by query, spontaneously reported or observed by clinic staff will be evaluated by the investigator and reported in the subject's case report form.
Study design
- Primary purpose
- Basic science
- Allocation
- Non-randomised
- Intervention model
- Single group
- Masking
- None (open label)
- Number of arms
- 3
| Arm | Type | Receives |
|---|---|---|
| Theophylline alone | Active comparator | Drug: Theophylline 300mgbaseline theophylline pharmacokinetics |
| Quinine alone | Active comparator | Drug: Quinine 648 mgbaseline quinine pharmacokinetics at steady state |
| Theophylline with steady state quinine | Experimental | Drug: Theophylline 300 mg, Drug: Quinine 648 mgTheophylline pharmacokinetics in the presence of steady state quinine and quinine pharmacokinetics in the presence of theophylline. |
Who may qualify
- Ages
- 18 to 45 years
- Sex
- Male only
- Healthy volunteers
- Accepted
- Age groups
- Adult
Key inclusion criteria (1 listed)
- Medically healthy non-smoking, non-obese (≥ 55kg and within 15% of ideal body weight) adult male volunteers 18-45 years of age
Key exclusion criteria (6 listed)
- Subjects with history or presence of glucose 6 phosphate dehydrogenase deficiency, myasthenia gravis, optic neuritis, glaucoma or significant cardiovascular disease (including hypotension, bradycardia or EKG abnormalities), pulmonary, hepatic, gallbladder or biliary tract, renal, hematologic, gastrointestinal, endocrine, immunologic, dermatologic, neurologic, psychiatric disease or an active sexually transmitted disease
- Subjects with significant blood loss in the prior 56 days, plasma donation within 7 days , hemoglobin <12.0 g/dl or who have participated in another clinical trial within the prior 30 days
- Subjects with recent (2-year) history or evidence of alcoholism or drug abuse
- Subjects who have used any drugs or substances known to inhibit or induce cytochrome P450 (CYP) enzymes and/or P-glycoprotein within 30 days prior to the first dose and throughout the study
- Subjects who test positive at screening for human immunodeficiency virus (HIV), hepatitis B surface antigen (HbsAg), or hepatitis C virus (HCV).
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Interventions
| Intervention | Type | Arms |
|---|---|---|
| Theophylline 300mgSingle doses of theophylline 300 mg as an immediate-release oral solution 80mg/15ml concentration administered alone at 7 am on Day 1 after an overnight fast of at least 10 hours and along with quinine sulfate (2 x 324 mg capsules) at 7am on Day 12 after an overnight fast of at least 10 hours. | Drug | Theophylline alone |
| Quinine 648 mg648 mg quinine sulfate(2 x 324 mg capsules) initiated at 3pm on Day 5 and taken every 8 hours through Day 11 and co-administered with theophylline 300 mg as an immediate-release oral solution 80 mg/15 ml concentration at 7am on Day 12. | Drug | Quinine alone |
| Theophylline 300 mgSingle doses of theophylline 300 mg as an immediate-release oral solution 80mg/15ml concentration administered alone at 7 am on Day 1 after an overnight fast of at least 10 hours and along with quinine sulfate (2 x 324 mg capsules) at 7am on Day 12 after an overnight fast of at least 10 hours. | Drug | Theophylline with steady state quinine |
| Quinine 648 mg648 mg quinine sulfate(2 x 324 mg capsules) initiated at 3pm on Day 5 and taken every 8 hours through Day 11 and co-administered with theophylline 300 mg as an immediate-release oral solution 80 mg/15 ml concentration at 7am on Day 12. | Drug | Theophylline with steady state quinine |
Primary outcome
Maximum Plasma Concentration(Cmax)
Time frame: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose. Serial pharmacokinetic blood samples for quinine collected on Days 11 and 12 before dosing and for 8 hours after the morning dose.
The maximum or peak concentration that the drug reaches in the plasma.
Area Under the Concentration Versus Time Curve From Time 0 to Time t [AUC(0-t)]
Time frame: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose. Serial pharmacokinetic blood samples for quinine collected on Days 11 and 12 before dosing and for 8 hours after the morning dose.
The area under the plasma concentration versus time curve beginning from the first dose (time 0) to the last measurable concentration (time t), as calculated by the linear trapezoidal method.
Area Under the Concentration Time Curve From Time 0 Extrapolated to Infinity [AUC(0-∞)].
Time frame: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose.
The area under the plasma concentration versus time curve from time 0 to infinity. AUC(0-∞)was calculated as the sum of the AUC(0-t) plus the ratio of the last measurable plasma concentration to the elimination rate constant.
2 secondary outcomes
Electrocardiogram (ECG) Evaluation of the Maximum QT Interval Corrected for Heartrate (QTc), Quinine Study Day 11.
Time frame: 5 hours - measured 1 hour pre-dose and then at 4 hours after the morning dose on Day 11
Electrocardiogram (ECG) Evaluation of the Maximum QT Interval Corrected for Heartrate (QTc), Theophylline Co-administered With Quinine, Study Day 12.
Time frame: 5 hours - measured 1 hour pre-dose and then at 4 hours post-dose on Day 12
Results and safety
Loading the posted results from ClinicalTrials.gov…
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 28 Oct 2009.
- Posted resultsParticipant flow, baseline, all outcome measures and adverse events.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
Matthew Davis, MD study chair
Mutual Pharmaceutical
Barrie March, MD principal investigator
PRACS Institute
1 site in 1 country: see every site and its status.
Questions about this trial
What is this clinical trial studying?
A Phase 1 study testing Theophylline 300mg, Quinine 648 mg and Theophylline 300 mg in people with Pharmacokinetics, run by Mutual Pharmaceutical Company, Inc. at 1 site in United States.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 1 inclusion and 6 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 28 Oct 2009. Status can change between updates, so confirm with the study contact before making plans.
Where is the study taking place?
The record lists 1 site in United States. Whether a site is taking part right now should be confirmed with that site. See every site.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
What does this phase mean?
Phase 1 studies test a treatment in a small group of people for the first time or in a new way, mainly to check safety and find the right dose.
Not every study follows the same path, and some studies (observational studies, device studies) have no phase.
Are results available for this study?
Yes. Results are posted in the registry (first posted 17 Jul 2009). A summary is in the For doctors view, and the full results are on ClinicalTrials.gov.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Maximum Plasma Concentration(Cmax) (time frame: Serial pharmacokinetic blood samples for theophylline collected on Days 1 and 12 before dosing and for 48 hours post-dose. Serial pharmacokinetic blood samples for quinine collected on Days 11 and 12 before dosing and for 8 hours after the morning dose.). The study lists 3 primary outcomes in all. It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 28 Oct 2009.