Study Evaluating the Pharmacokinetics (PK), Safety, and Tolerability of Tigecycline in Patients 8 to 11 Years of Age
- Conditions
- Bacterial InfectionsIntra-Abdominal InfectionPneumonia, BacterialSkin Diseases, BacterialSkin Diseases, Infectious
- Interventions
- Registration Number
- NCT00488345
- Lead Sponsor
- Wyeth is now a wholly owned subsidiary of Pfizer
- Brief Summary
To determine the pharmacokinetic profile and to evaluate the safety and tolerability of ascending multiple doses of tigecycline in patients aged 8 to 11 years with selected serious infections; complicated intra-abdominal infections (cIAI), complicated skin and skin structure infections (cSSSI), or community-acquired pneumonia (CAP).
- Detailed Description
Not available
Recruitment & Eligibility
- Status
- COMPLETED
- Sex
- All
- Target Recruitment
- 59
Not provided
Not provided
Study & Design
- Study Type
- INTERVENTIONAL
- Study Design
- SINGLE_GROUP
- Arm && Interventions
Group Intervention Description A Tygacil 0.75 mg/kg (up to a maximum dose of 50 mg for each dose) of tigecycline every 12 hours infused over approximately 30 minutes. Escalation to next dose cohort will occur only after safety and tolerability at preceding dose have been established by sponsor (after tigecycline LDOT data are received) and if at least 5 of 6 PK samples per patient have been received by central laboratory in acceptable condition for 10 to 12 patients in cohort. Treatment period of tigecycline will be a minimum of 3 days (unless patient is considered a treatment failure before this time) and a maximum of 14 days. On or after Day 4, based on investigator's decision, patients can switch to oral antibiotic therapy (to be chosen and provided by the investigator) and discharged after collection of planned PK samples. C Tygacil 1.25 mg/kg (up to maximum dose of 50 mg for each dose) of tigecycline every 12 hours infused over approximately 30 minutes. Treatment period of tigecycline will be a minimum of 3 days (unless patient is considered a treatment failure before this time) and a maximum of 14 days. On or after Day 4, based on investigator's decision, patients can switch to oral antibiotic therapy (to be chosen and provided by the investigator) and discharged after collection of planned PK samples. B Tygacil 1 mg/kg (up to a maximum dose of 50 mg for each dose) of tigecycline every 12 hours infused over approximately 30 minutes. Escalation to next dose cohort will occur only after safety and tolerability at preceding dose have been established by sponsor (after tigecycline LDOT data are received) and if at least 5 of 6 PK samples per patient have been received by the central laboratory in acceptable condition for 10 to 12 patients in the cohort. Treatment period of tigecycline will be a minimum of 3 days (unless the patient is considered a treatment failure before this time) and a maximum of 14 days. On or after Day 4, based on investigator's decision, patients can switch to oral antibiotic therapy (to be chosen and provided by the investigator) and discharged after collection of planned PK samples.
- Primary Outcome Measures
Name Time Method Maximum Observed Plasma Concentration (Cmax) Day 3 (immediately post-dose, 0.75, and 2 hours post-dose) Cmax: tigecycline serum concentration measured in nanograms per milliliter (ng/mL) determined by a validated liquid chromatography with mass spectrophotometric (LC/MS/MS) detection method. Peak concentration was taken directly from the observed data.
Time to Reach Maximum Observed Plasma Concentration (Tmax) Day 3 (immediately post-dose, 0.75, and 2 hours post-dose) Time of peak concentration taken directly from the observed data.
Area Under the Curve (AUCτ) From Time Zero to Time of Estimated Concentration at 12 Hours Day 3 (just before and immediately after infusion, and 0.75, 2, and 6 hours post-dose) AUCτ: AUC between doses from time zero to the time of estimated concentration at 12 hours reported in nanograms \* hours divided by milliliters (ng\*h/mL) was calculated using the log-trapezoidal rule for decreasing concentrations and the linear-trapezoidal rule for increasing concentrations estimating the 12 hour drug concentration if necessary.
Weight Normalized Drug Clearance (CLW) Day 3 (just before and immediately after infusion, and 0.75, 2, and 6 hours post-dose) Weight normalized drug clearance measured in liters per hour per kilogram (L/hr/kg). Drug clearance (CL) was determined as the ratio of dose/area under the concentration-time curve from time zero (start of infusion) to 12 hours (start of next infusion) (AUCτ). CLW was determined as the ratio of CL/weight.
Percentage of Participants With Clinical Response (CR) to Tigecycline at Last Day of Therapy (LDOT) and Test-of-Cure (TOC) Assessment Day 14 or LDOT, TOC Visit (10 to 21 days after last dose of total antibiotic therapy) CR = Cure: resolution of all signs, symptoms (SS) of infection (INF) or improvement, no further antibacterial therapy (AT) necessary; Improved (IMP): SS IMP to extent that switch to oral AT deemed appropriate; Failure: lack of response, required additional AT, initial recovery then deterioration requiring further AT, death due to the INF after day 2, death due to treatment (TR)-related adverse event (AE), required non-routine surgical TR \>48 hours after 1st dose of TR due to failure to IMP or clinical worsening. TOC = CR, vital signs, physical exam, laboratory results, concomitant TR, and AEs.
- Secondary Outcome Measures
Name Time Method Population Pharmacokinetic (PK) Model: Volume of Distribution 3074K4-2207: Day 3 just before and immediately after infusion, and 0.75, 2, and 6 hours post-dose; 3074A1-110: just before and 0.5, 0.75, 1, 2, 3, 4, 8, 12, 24, 36, and 48 hours after start of infusion Two compartment model with linear clearance and effect of weight on clearance using pooled PK data from 2 pediatric studies. All concentration-time data were combined and analyzed using population PK methods to investigate potential influence of age, weight, and height (dose, tigecycline concentrations, times, subject weight, height, age, body surface area, serum creatinine, estimated creatinine clearance, serum bilirubin.
Population Pharmacokinetic (PK) Model: Clearance 3074K4-2207: Day 3 just before and immediately after infusion, and 0.75, 2, and 6 hours post-dose; 3074A1-110: just before and 0.5, 0.75, 1, 2, 3, 4, 8, 12, 24, 36, and 48 hours after start of infusion Two compartment model with linear clearance and effect of weight on clearance using pooled PK data from 2 pediatric studies. All concentration-time data were combined and analyzed using population PK methods to investigate potential influence of age, weight, and height (dose, tigecycline concentrations, times, subject weight, height, age, body surface area, serum creatinine, estimated creatinine clearance, serum bilirubin.
Population Pharmacokinetic (PK) Model: Effect of Weight 3074K4-2207: Day 3 just before and immediately after infusion, and 0.75, 2, and 6 hours post-dose; 3074A1-110: just before and 0.5, 0.75, 1, 2, 3, 4, 8, 12, 24, 36, and 48 hours after start of infusion Two compartment model with linear clearance and effect of weight on clearance using pooled PK data from 2 pediatric studies. All concentration-time data were combined and analyzed using population PK methods to investigate potential influence of age, weight, and height (dose, tigecycline concentrations, times, subject weight, height, age, body surface area, serum creatinine, estimated creatinine clearance, serum bilirubin.