Study To Assess Pharmacokinetics, Safety & Efficacy of Anidulafungin When Treating Children With Invasive Candidiasis

An AE was any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. A SAE was an AE resulting in any of the following outcomes or deemed significant for any other reason: death; initial or prolonged inpatient hospitalization; life-threatening experience (immediate risk of dying); persistent or significant disability/incapacity; congenital anomaly. Treatment-emergent are events between first dose of study drug and up to 6 weeks after end of treatment (EOT) (up to 91 days) that were absent before treatment or that worsened relative to pretreatment state. AEs included both SAEs and non-SAEs. EOT visit defined as last day of study treatment (IV or oral).

Criteria for laboratory abnormalities: Hematology parameters: red blood cell count: <0.8*lower limit of normal (LLN); reticulocytes count (absolute or percent): <0.5*LLN or greater than (>) 1.5*upper limit of normal (ULN); Platelets: <0.5*LLN or >1.75*ULN; white blood cell count: <0.6*LLN or >1.5*ULN; neutrophils (absolute or percent): <0.8*LLN or >1.2*ULN; basophils (absolute or percent): >1.2*ULN; lymphocytes (absolute or percent): <0.8*LLN or >1.2*ULN; monocytes (absolute or percent): >1.2*ULN. Serum Chemistry parameters: sodium: <0.95*LLN or >1.05*ULN, potassium, chloride, bicarbonate, calcium: <0.9*LLN or >1.1*ULN; magnesium: >1.1*ULN or <0.9*LLN; BUN (blood urea nitrogen): >1.3* ULN, creatinine: >1.3*ULN; aspartate aminotransferase (AST), alanine aminotransferase (ALT), alkaline phosphatase : >3.0*ULN ; total bilirubin: >1.5*ULN; albumin: <0.8*LLN or >1.2*ULN and glucose: <0.6*LLN or >1.5*ULN.EOT visit defined as last day of study treatment (IV or oral).

Global response categorized: success, failure, indeterminate.Success:clinical response(CR) of cure(resolution of sign, symptoms attributed to Candida infection[CI]; no additional systemic/oral antifungal) or improvement (significant but incomplete resolution of signs symptoms of CI; no additional systemic antifungal) and microbiological eradication/presumed eradication(Baseline pathogen not isolated from original site culture/culture data not available for participant with successful outcome).Failure:CR of failure(no significant improvement in signs symptoms/ death due to CI)and/or microbiological failure(persistence/new infection at follow-up/relapse of infection at follow-up). Indeterminate:CR of indeterminate(evaluation not made or failure assessment)and/or microbiological response of indeterminate(Culture data not available for participant with clinical outcome of indeterminate) and neither response was failure.EOT visit:last day of study treatment (IV or oral).

Non-compartmental PK analysis was performed on individual plasma anidulafungin concentration-time data collected by serial sampling from participants in the PK sub-study. AUC24 was calculated based on the trapezoidal rule.

Cmax was obtained directly from the observed concentration data on Day 2.

Excipient PS 80 is a solubilizing agent contained in the IV formulation of anidulafungin. The lower limit of quantitation (LLOQ) for all the observations of PS 80 was 5.0 microgram per milliliter (mcg/mL). PK time points were assessed on Day 1, Day 3, Day 5, Day 7 and Day 9. Summarized data for all the time points was reported.

Excipient PS 80 is a solubilizing agent contained in the IV formulation of anidulafungin. The lower limit of quantitation (LLOQ) for all the observations of PS 80 was 5.0 mcg/ml. PK time points were assessed on at Day 1, Day 3, Day 5, Day 7 and Day 9. Summarized data for all the time points was reported.

AUC24 values were calculated using the individual parameter estimates obtained from the final population PK model. PK time points were assessed on Days 1-3, Day 5, Day 7, and Day 9. Data for all time points were included in the model.

Cmin values were calculated using the individual parameter estimates obtained from the final population PK model. PK time points were assessed on Days 1-3, Day 5, Day 7, and Day 9. Data for all time points were included in the model.

The probability of having at least one hepatic adverse event was compared with AUC0-24,ss quantile. Individual parameter estimates from the final PK model were used for estimation of Anidulafungin exposures.

The probability of having at least one GI adverse event whilst on Anidulafungin treatment was compared with AUC0-24,ss quantile. Individual parameter estimates from the final PK model were used for estimation of Anidulafungin exposures.

The probabilities of a global response of success or failure were compared with AUC0-24,ss quantile. Individual parameter estimates from the final PK model were used for estimation of Anidulafungin exposures. For the analysis of this outcome measure, global response was categorized as: success or failure. Success defined as clinical response (CR) of cure (resolution of signs, symptoms attributed to Candida infection [CI]). Failure defined as CR of failure (no significant improvement in signs symptoms/ death due to CI) and/or microbiological failure (persistence/new infection at follow-up/relapse of infection at follow-up).

Relapse was defined as any baseline Candida species isolated following eradication (documented or presumed); or culture data not available for a participant with a clinical response of failure after a previous response of success. Clinical response of failure was defined as no significant improvement in signs and symptoms, or death due to the Candida infection. Participants had received at least 3 doses of study medication to be classified as a failure. Clinical response of success was defined as resolution of sign and symptoms attributed to Candida infection occurred with no additional systemic or oral antifungal treatment required to complete the course of therapy. Eradication or presumed eradication: baseline pathogen not isolated from original site culture(s), or culture data are not available for a participant with successful clinical outcome. End of treatment visit defined as last day of study treatment (IV or oral).

New infection was defined as a participant presenting with clinical failure with the emergence of new Candida species at the original site of infection or at a distant site of infection. Clinical response of failure was defined as no significant improvement in signs and symptoms, or death due to the Candida infection occurred. Participants had received at least 3 doses of study medication to be classified as a failure. End of treatment visit defined as last day of study treatment (IV or oral).