Safety, Tolerability and Pharmacokinetics of BIIB118 (PF-05251749)

An AE was any untoward medical occurrence attributed to study drug in a participant who received study drug. A serious adverse event (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.

Hemoglobin(Hgb),hematocrit,red blood cell(RBC):less than(<)0.8*lower limit of normal(LLN), MCV,MCH,MCHC,MPV:<0.9*LLN or >1.1*upper limit of normal(ULN), platelet:<0.5*LLN or >1.75*ULN, white blood cell(WBC):<0.6*LLNor>1.5*ULN, lymphocyte,neutrophil,total neutrophil:<0.8*LLN or >1.2*ULN,basophil,eosinophil,monocyte:>1.2*ULN; PTT, PT:>1.1*ULN,Fibrinogen<0.75*ULNor>1.25ULN; total, direct, indirect bilirubin >1.5*ULN,aspartate aminotransferase,alanine aminotransferase,gamma-glutamyl transferase,alkaline phosphatase:> 3.0*ULN,total protein,albumin:<0.8*LLN or >1.2*ULN;blood urea nitrogen,creatinine:>1.3*ULN,uric acid>1.2*ULN;sodium:<0.95*LLN or>1.05*ULN,potassium,chloride, calcium,magnesium,bicarbonate:<0.9*LLN or >1.1*ULN, phosphate<0.8*LLN or >1.2*ULN; glucose <0.6*LLN or >1.5*ULN,creatine kinase>2.0*ULN;urine(specific gravity<1.003or>1.030,pH <4.5or>8,glucose,ketone,protein,blood/Hgb,bilirubin,leukocyte esterase,crystals>=1,RBC,WBC >=20*ULN,bacteria>20);CSF (WBC>=6,RBC>0,Albumin>35).

Criteria for clinically significant change from baseline in vital signs: supine systolic blood pressure (SBP) <90 millimeter of mercury (mmHg), supine diastolic BP (DBP) <50 mmHg, supine pulse rate <40 beats per minute (bpm) or >120 bpm. Maximum increase or decrease from baseline in supine SBP greater than or equal to (>=)30 mmHg and maximum increase or decrease from baseline in supine DBP >=20 mmHg.

ECG parameters included maximum pulse rate (PR) interval, QRS interval, and corrected QT interval using Fridericia's formula (QTcF). Criteria for abnormal ECG: Maximum PR interval >=300 milliseconds (msec) or >=25 percent increase when baseline is >200 msec and >=50 percent increase when baseline is less than or equal to (=<) 200 msec; QRS interval >=140 msec or >=50 percent increase from baseline (IFB); and QTcF 30<=change<60 or change>=60 msec increase. The number of participants with abnormal ECG findings are reported.

The BL-VAS monitored the subjective mood of each participant on 16 mood scales. Participants were asked to indicate on the VAS scale ranging from 0 to 100 mm about how they felt at the moment the scale was administered (example, alert/drowsy; calm/excited; content/tensed). The individual responses from the 16 mood scales were then combined to make three affective dimensions/subscales a) alertness (average of 9 items [total range 0 to 100, where each item is ordered so that higher scores indicated more alertness]), b) contentment (average of 2 items [total range 0 to 100, where higher scores indicated more contentment]), and c) calmness (average of 5 items [total range 0 to 100, where higher scores indicated more calmness]). Baseline is defined as the last available recording prior to dosing on Day 1 of the first Period.

The BL-VAS monitored the subjective mood of each participant on 16 mood scales. Participants were asked to indicate on the VAS scale ranging from 0 to 100 mm about how they felt at the moment the scale was administered (example, alert/drowsy; calm/excited; content/tensed). The individual responses from the 16 mood scales were then combined to make three affective dimensions/subscales a) alertness (average of 9 items [total range 0 to 100, where each item is ordered so that higher scores indicated more alertness]), b) contentment (average of 2 items [total range 0 to 100, where higher scores indicated more contentment]), and c) calmness (average of 5 items [total range 0 to 100, where higher scores indicated more calmness]). Baseline is defined as the last available recording prior to dosing on Day 1 of the first Period.

The BL-VAS monitored the subjective mood of each participant on 16 mood scales. Participants were asked to indicate on the VAS scale ranging from 0 to 100 mm about how they felt at the moment the scale was administered (example, alert/drowsy; calm/excited; content/tensed). The individual responses from the 16 mood scales were then combined to make three affective dimensions/subscales a) alertness (average of 9 items [total range 0 to 100, where each item is ordered so that higher scores indicated more alertness]), b) contentment (average of 2 items [total range 0 to 100, where higher scores indicated more contentment]), and c) calmness (average of 5 items [total range 0 to 100, where higher scores indicated more calmness]). Baseline is defined as the last available recording prior to dosing on Day 1 of the first Period.

ESRS is a clinician rated scale to assess parkinsonism,dystonia,dyskinesia,akathisia.The ESRS consists of 4 subscales and 4 clinicians global impressions-severity scales(CGI-S scales):I)a questionnaire of extrapyramidal symptoms or drug-induced movement disorders(a series of 4-point Likert scale questions with 0=Absent and 3=Severe);II)an examination of Parkinsonism and akathisia(7-point Likert scale with 0=Absent,6=extremely severe);III)an examination of dystonia(7-point Likert scale with 0=Absent,6=extremely severe);IV)an examination of dyskinesia(7-point Likert scale with 0=normal,6=most severe);V)toVIII)CGI-S scales(9-point Likert scale with 0=Absent,8=extremely severe)of tardive dyskinesia,parkinsonism,dystonia,akathisia.ESRS-Parkinsonism:total score range:0 to 14 where higher scores indicates greater severity;ESRS-dystonia:total score range:0 to 14 where higher scores indicates greater severity.Change from baseline was only observed in examination of parkinsonism and dystonia.

ESRS is a clinician rated scale to assess parkinsonism,dystonia,dyskinesia,akathisia.The ESRS consists of 4 subscales and 4 clinicians global impressions-severity scales(CGI-S scales):I)a questionnaire of extrapyramidal symptoms or drug-induced movement disorders(a series of 4-point Likert scale questions with 0=Absent and 3=Severe);II)an examination of Parkinsonism and akathisia(7-point Likert scale with 0=Absent,6=extremely severe);III)an examination of dystonia(7-point Likert scale with 0=Absent,6=extremely severe);IV)an examination of dyskinesia(7-point Likert scale with 0=normal,6=most severe);V)toVIII)CGI-S scales(9-point Likert scale with 0=Absent,8=extremely severe)of tardive dyskinesia,parkinsonism,dystonia,akathisia.ESRS-Parkinsonism:total score range:0 to 14 where higher scores indicates greater severity;ESRS-dystonia:total score range:0 to 14 where higher scores indicates greater severity.Change from baseline was only observed in examination of parkinsonism and dystonia.

Area under the plasma concentration-time profile from time zero to the time of last quantifiable concentration (Clast ).

AUC (0 -∞) = Area under the plasma concentration- time profile from time zero extrapolated to infinite time. It was calculated as AUC last + (C last*/k el), where C last* was the predicted plasma concentration at the last quantifiable time point estimated from the log-linear regression analysis.

Terminal elimination half-life (t1/2). It was calculated as dividing the natural logarithm to the base e (Log e)*2/k el, where k el is the terminal phase rate constant calculated by a linear regression of the log-linear concentration-time curve.

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. Drug clearance is a quantitative measure of the rate at which a drug substance is removed from the blood.

Volume of distribution is defined as the theoretical volume in which the total amount of drug would need to be uniformly distributed to produce the desired plasma concentration of a drug. Apparent volume of distribution after oral dose (Vz/F) is influenced by the fraction absorbed.

Area under the plasma concentration-time profile from time zero to the time of last quantifiable concentration (Clast).

AUC (0 -∞) = Area under the plasma concentration- time profile from time zero extrapolated to infinite time. It was calculated as AUC last + (C last*/k el), where C last* was the predicted plasma concentration at the last quantifiable time point estimated from the log-linear regression analysis.

Area under the CSF concentration-time profile from time zero to the time of last quantifiable concentration (Clast).

AUC (0 -∞) = Area under the CSF concentration- time profile from time zero extrapolated to infinite time. It was calculated as AUC last + (C last*/k el), where C last* was the predicted CSF concentration at the last quantifiable time point estimated from the log-linear regression analysis.