Vemurafenib

Progression-free survival was defined as the time from randomization to the first occurrence of disease progression, as determined by the investigator using Response Evaluation Criteria in Solid Tumors v1.1, or death from any cause, whichever came first. Disease progression was defined as: (1) at least a 20% increase in the sum (the increase in the sum must be at least 5 mm) of diameters of target lesions, taking as reference the smallest sum during the study; (2) unequivocal progression of existing non-target lesions; or (3) the appearance of 1 or more new lesions.

DFS was defined as the time from randomization until the date of the first local, regional, or distant melanoma recurrence, occurrence of new primary melanoma, or death from any cause.

The intensity of AEs were graded on a 5-point scale (Grade 1 to 5) according to the NCI-CTCAE version 4.0, where Grade 1 indicates "Mild" severity and Grade 5 indicates "Death". The CTCAE defines Grades 3 and 4 as follows: Grade 3 means "Severe"; Inability to work or perform normal daily activity; treatment or medical intervention is indicated in order to improve the overall well-being or symptoms; delaying the onset of treatment is not putting the survival of the participant at direct risk. Grade 4 means "Life-threatening, Disabling"; based on extreme limitation in activity; significant medical intervention/therapy required; and hospitalization probable.

An AE was considered as any unfavorable and unintended sign, symptom, or disease associated with the use of the study drug, whether or not considered related to the study drug. Pre existing conditions that worsened during the study and laboratory or clinical tests that resulted in a change in treatment or discontinuation from study drug were reported as adverse events. Percentage of participants with dose interruption or discontinuation due to AE was presented.

AEs of special interest included cutaneous squamous cell carcinoma (SCC), rash, photosensitivity, liver injury, arthralgia, fatigue, gastrointestinal (GI) polyps, pancreatitis, potentiation of radiation toxicity, prolongation of cardiac repolarization or arrhythmia, non-cutaneous SCC and other primary malignancies (other than cutaneous SCC or new primary melanoma).

Exposure excluding treatment interruptions: Duration during which participants actually took vemurafenib. Any time without dose-taken due to adverse events, non-compliance or any other reasons was not counted. Exposure including treatment interruptions: date of last dose - date of first dose + 1; duration during which participants actually took vemurafenib as well as duration on which medication was not taken were included in this calculation.

Exposure excluding treatment interruptions: Duration during which participants actually took vemurafenib. Any time without dose-taken due to adverse events, non-compliance or any other reasons was not counted. Exposure including treatment interruptions: date of last dose - date of first dose + 1; duration during which participants actually took vemurafenib as well as duration on which medication was not taken were included in this calculation. Average total dose per day: total actual dose taken divided by total actual days on treatment.

Dose intensity was defined as (total actual doses taken/total planned doses) \*100, where total planned doses = prescribed doses \* planned days on treatment, where planned days on treatment were defined as the interval between date of first dose and date of last dose.

An Overall survival event was defined as death due to any cause. The number of participants with overall survival events is reported.

Confirmed BORR: percentage of participants with an objective response (OR) (complete response \[CR\], partial response \[PR\], stringent CR \[sCR\] or very good PR \[VGPR\]) on 2 occasions \>/= 4 weeks apart as assessed by the Investigator using Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. or International Myeloma Working Group (IMWG) criteria. RECIST v1.1: CR: disappearance of all target lesions; PR: \>/= 30% decrease in the sum of diameters of target lesions. IMWG: CR: negative immunofixation on serum and urine, disappearance of any soft tissue plasmacytomas and \</= 5% plasma cells in bone marrow; PR: \>/= 50% reduction of serum M-protein and reduction in 24-hour urinary M-protein by \>/= 90% or to \<200 mg per 24 hours. VGPR: serum and urine M-protein detectable by immunofixation but not on electrophoresis or \>/= 90% reduction in serum M-protein plus urine M-protein level \< 100 mg per 24 hour; sCR: CR plus normal free light chain (FLC) ratio and no clonal cells in bone marrow.

BORR assessed by IRC is defined as percentage of participants who were responders \[with best overall response (BOR) documented as confirmed complete response (CR) or partial response (PR)\]. The RECIST v1.1 criteria modified for independent review of body and brain lesions was based on current radiology practices. The modifications to RECIST v1.1 included allowing target lesions in the brain to be \>=5 mm by contrast-enhanced magnetic resonance imaging scan (in traditional RECIST v1.1 this is \>=10 mm), allowing up to 5 target lesions in the brain (in traditional RECIST v1.1 only 2 target lesions), and examining the lesions within the brain and outside the brain separately for analytical purposes. CR: disappearance of all target lesions. Any pathological lymph nodes (whether target or non-target) must have reduction in short axis to less than (\<) 10 millimeters (mm), PR: At least a 30% decrease in the sum of diameters of target lesions, taking as reference the baseline sum diameters.

Best overall response rate was assessed by the investigators according to the Response Evaluation Criteria in Solid Tumors (RECIST) v1.1. Best overall response rate: the percentage of participants with best objective response of complete response (CR) or partial response (PR) (calculated as the number of participants with best response CR or PR divided by the total number of efficacy-evaluable participants). CR: disappearance of all target lesions with reduction in target/non-target pathological lymph nodes to \< 10 millimeters (mm). PR: ≥ 30% decrease in the sum of diameters of target lesions, compared to the baseline sum diameters.

BOR was defined as a complete response (CR) or partial response (PR) confirmed per Response Evaluation Criteria In Solid Tumors (RECIST) version 1.1. Patients who never received study treatment and treated patients without any post-baseline tumor assessments were considered as non-responders. CR: Disappearance of all target lesions, all non-target lesions, and no new lesion. Any pathological lymph nodes must have had reduction in the short axis to \<10 mm. PR: At least a 30% decrease in the sum of diameters of target lesions, no progression in non-target lesion, and no new lesion.

%F is the ratio of dose normalized AUCtau following vemurafenib oral dose to dose normalized AUC0-inf following IV dose. Time Frame: Vemurafenib oral dose (Day 21: Predose \[0 hour\]; 15 minutes after oral dose \[at the end of IV infusion\], at 30 and 45 minutes, and 1.15, 2.25, 3.25, 4.25, 6.25, 8.25, and 12 hours following oral administration of unlabeled vemurafenib); Vemurafenib IV dose (Day 21: Predose \[Hour 0\]; end of infusion \[infusion duration: 15 minutes\]; 5, 15 and 30 minutes post-infusion; 1, 2, 3, 4, 6, 8, 12 hours post-infusion of 14C-labeled vemurafenib).

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 8 hours, using the linear trapezoid rule. The value was averaged among all participants and expressed in hours by micrograms per milliliter (h\*μg/mL).

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 8 hours, using the linear trapezoid rule. The value was averaged among all participants and expressed in h\*μg/mL.

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 12 hours, using the linear trapezoid rule. The value was averaged among all participants and expressed in h\*μg/mL.

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 12 hours, using the linear trapezoid rule. The value was averaged among all participants and expressed in h\*μg/mL.

Plasma PK samples were obtained from each participant, and the maximum observed post-dose concentration was recorded. The value was averaged among all participants and expressed in micrograms per milliliter (μg/mL).

Plasma PK samples were obtained from each participant, and the maximum observed post-dose concentration was recorded. The value was averaged among all participants and expressed in μg/mL.

Plasma PK samples were obtained from each participant, and the time of maximum post-dose concentration was recorded. The median value was derived from all participants and expressed in hours.

Plasma PK samples were obtained from each participant, and the time of maximum post-dose concentration was recorded. The median value was derived from all participants and expressed in hours.

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 168 hours, using the linear trapezoid rule. The value was averaged among all participants and expressed in h\*μg/mL.

Plasma PK samples were obtained from each participant for calculation of t1/2, defined as the time elapsed for plasma concentrations to drop by half. The value was averaged among all participants and expressed in hours.

Plasma PK samples were obtained from each participant, and the concentration immediately prior to drug administration was recorded. The value was averaged among all participants and expressed in μg/mL.

Plasma PK samples were obtained from each participant, and the concentration immediately prior to drug administration was recorded. The value was averaged among all participants and expressed in μg/mL.

Plasma PK samples were obtained from each participant, and the concentration immediately prior to drug administration was recorded. The value was averaged among all participants and expressed in μg/mL.

Plasma PK samples were obtained from each participant for calculation of AUC from 0 to 8 hours, using the linear trapezoid rule. The AUC on Day 21 was divided by the AUC for Day 1. The resulting value was averaged among all participants and expressed as the accumulation ratio.

Plasma PK samples were obtained from each participant and the kel was estimated. The value was averaged among all participants and expressed in inverse hours (h\^-1).

AUClast is the area under the vemurafenib plasma concentration versus time curve from time zero to the time of last measured concentration of vemurafenib (Tlast). Area under the curve (AUC) is a measure of the plasma concentration of a drug over time. AUClast is presented in micrograms times (\*) hour per milliliter (mcg\*h/mL).

AUC(0-inf) is the AUC from time zero (pre-dose) to extrapolated infinite time (0-inf). AUC is a measure of the plasma concentration of a drug over time. AUC(0-inf) is presented in mcg\*h/mL.

Cmax is the maximum observed plasma vemurafenib concentration, presented in microgram per milliliter (mcg/mL).

AUClast = Area under the plasma-concentration time curve from time zero to the last measurable plasma concentration which is presented in hour\*nanogram per milliliter (hour\*ng/mL). Hour 0 (H0) signified pre-dose sampling.

Clearance of a drug is a measure of the rate at which a drug is metabolized or eliminated by normal biological processes. Clearance obtained after oral dose (apparent oral clearance) is influenced by the fraction of the dose absorbed. Clearance was estimated from population PK modeling. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.