The total number of participants with laboratory test abnormalities (without regard to baseline abnormality) was assessed. *This endpoint was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for this timeframe were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). Participants analyzed indicated number of participants evaluated.

Vital signs included blood pressure (BP; supine, sitting and standing) and pulse rate. Vital signs criteria of potential clinical concern were 1), BP: systolic BP (SBP) greater than or equal to (>=) 30 or 50 millimeters of mercury (mm Hg) change from grand baseline in same posture, systolic less than (<) 90 mm Hg; diastolic BP (DBP) >=20 mm Hg change from grand baseline in same posture, diastolic <50 mm Hg; 2), pulse rate (supine, sitting and standing): <40 or greater than (>) 120 beats per minute (bpm); Standing: <40 or >140 bpm. *This endpoint was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for this timeframe were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). n=number of evaluable participants.

ECG criteria of potential clinical concern were 1), PR interval: >=300 milliseconds (msec); >=25% increase when baseline >200 msec; or increase >=50% when baseline <=200 msec; 2), QRS interval: >=140 msec; >=50% increase from baseline; 3), QT interval: >=500 msec, QTc interval using Fridericia's formula (QTcF interval): absolute value >=450 - <480 msec, >=480-<500 msec, >=500 msec; absolute change 30 - <60, >=60 msec. *This endpoint was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for this timeframe were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). n=number of evaluable participants.

The complete physical examination included examination of the skin, eyes, ears, throat, neck, cardiac, respiratory, gastrointestinal, and musculoskeletal systems. The limited physical examination included examination of the cardiac, respiratory, gastrointestinal, and musculoskeletal systems. *This endpoint was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for this timeframe were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). Participants analyzed indicated those who had physical examinations done at both baseline and last visit.

The complete neurological examination included an assessment of the motor, sensory, cranial nerves, reflexes, mental status and associated motor functions. The limited neurological exam could examine the same categories of neurologic assessments as the full examination, but would differ by the depth in the examination. The examination was required to be done to the extent needed to assess the participant for any potential changes in neurological status, as determined by the Investigator, but had to always include an assessment of motor, vision and hearing. *This endpoint was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for this timeframe were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). Participants analyzed indicated those who had neurological examinations done at both baseline and last visit.

Data were mapped to Columbia-Classification Algorithm of Suicide Assessment (C-CASA) event codes. C-SSRS assessed if participant experienced: completed suicide (Code 1), suicide attempt (Code 2) (Response of "Yes" on "actual attempt"), preparatory acts toward imminent suicidal behavior (Code 3) ("Yes" on "aborted attempt", "interrupted attempt", "preparatory acts or behavior"), suicidal ideation (Code 4) ("Yes" on "wish to be dead", "non-specific active suicidal thoughts", "active suicidal ideation with methods without intent to act/some intent to act without specific plan or with specific plan and intent), self-injurious behavior, no suicidal intent (Code 7) ("Yes" on "Has participant engaged in non-suicidal self-injurious behavior"). Number of participants with "Yes" response for any of above mentioned categories was assessed. *This was a primary endpoint for Part 1 (timeframe Days 1 to 14), as data for it were not reported separately, Part 1 and 2 data were reported together.

The FAS consisted of all randomized participants who took any study medication (active or placebo). n=number of participants who had C-SSRS assessed at that visit.

The mRS is a 6-point scale of functional recovery. The scale grades participants as having no symptoms (0), minor symptoms (1), minor handicap (2), moderate handicap (3), moderately severe handicap (4), severe handicap (5), or death (6).

The Inferential Full Analysis Set (I-FAS) consisted of participants within the FAS who were randomized to PF-03049423 maximum tolerated dose (MTD) or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). n=number of participants included for comparison between active drug and placebo.

The B&B test is a measure of manual dexterity. The B&B apparatus consists of a box divided into 2 sections and 1-inch hardwood blocks. The blocks began in the compartment of the test box to the dominant side of the participant. The participant was required to transfer the blocks one at a time to the other side of the box as quickly as possible in 1 minute using the non-paretic hand. The box was then turned so all the blocks were in the same side as the paretic hand. The participant was then required to do the test with his/her paretic hand. The participant was told that if more than 1 block was picked up at a time it was to only count as 1 block. The participant was also told that their fingertips needed to cross the partition for the block to be counted. The performance measure for this task was the number of blocks moved within 1 minute.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Number of participants indicated those participants included for comparison between active drug and placebo.

The B&B test is a measure of manual dexterity. The B&B apparatus consists of a box divided into 2 sections and 1-inch hardwood blocks. The blocks began in the compartment of the test box to the dominant side of the participant. The participant was required to transfer the blocks one at a time to the other side of the box as quickly as possible in 1 minute using the non-paretic hand. The box was then turned so all the blocks were in the same side as the paretic hand. The participant was then required to do the test with his/her paretic hand. The participant was told that if more than 1 block was picked up at a time it was to only count as 1 block. The participant was also told that their fingertips needed to cross the partition for the block to be counted. The performance measure for this task was the number of blocks moved within 1 minute.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Number of participants indicated those participants included for comparison between active drug and placebo.

The Hand Grip Strength Test measures the maximum isometric strength of the hand and forearm muscles. The participant was required to squeeze the dynamometer with maximum isometric effort while sitting with shoulder adducted and neutrally roated, elbow flexed at 90 degrees and the forearm in neutral position and wrist between 0 to 30 degrees dorsiflexion and a 0 to 15 degrees ulnar deviation. The participant performed this task 3 times with each hand, starting with the non-paretic hand. The performance measure for this task was the average score measured in pounds of pressure exerted.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). n=number of participants included for comparison between active drug and placebo.

The Hand Grip Strength Test measures the maximum isometric strength of the hand and forearm muscles. The participant was required to squeeze the dynamometer with maximum isometric effort while sitting with shoulder adducted and neutrally roated, elbow flexed at 90 degrees and the forearm in neutral position and wrist between 0 to 30 degrees dorsiflexion and a 0 to 15 degrees ulnar deviation. The participant performed this task 3 times with each hand, starting with the non-paretic hand. The performance measure for this task was the average score measured in pounds of pressure exerted.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Number of participants analyzed indicated those participants included for comparison between active drug and placebo.

The mRS is a 6-point scale of functional recovery. The scale grades participants as having no symptoms (0), minor symptoms (1), minor handicap (2), moderate handicap (3), moderately severe handicap (4), severe handicap (5), or death (6).

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg).

The NIHSS is a graded 11-item neurological examination rating speech and language, cognition, visual field deficits, motor and sensory impairments and ataxia used for the clinical assessment of acute stroke therapy. The maximum total score is 42 in a participant with a severe neurological deficit; the minimum score is 0 in a participant without gross neurological deficits.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg).

The NIHSS is a graded 11-item neurological examination rating speech and language, cognition, visual field deficits, motor and sensory impairments and ataxia used for the clinical assessment of acute stroke therapy. The maximum total score is 42 in a participant with a severe neurological deficit; the minimum score is 0 in a participant without gross neurological deficits.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

The BI is an index of independence to score the ability of a participant with a neuromuscular or musculoskeletal disorder to care for him or herself. The index rates a participant's ability on the following 10 activities: feeding, moving from wheelchair to bed, personal toilet, getting on and off toilet, bathing self, walking on level surface, ascending and descending stairs, dressing, controlling bowels and controlling bladder. The maximum total score is 100 in a participant without functional impairment; the minimum score is 0 in a participant with major functional impairment.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg).

The BI is an index of independence to score the ability of a participant with a neuromuscular or musculoskeletal disorder to care for him or herself. The index rates a participant's ability on the following 10 activities: feeding, moving from wheelchair to bed, personal toilet, getting on and off toilet, bathing self, walking on level surface, ascending and descending stairs, dressing, controlling bowels and controlling bladder. The maximum total score is 100 in a participant without functional impairment; the minimum score is 0 in a participant with major functional impairment.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

The test uses a reference key, the participant had 90 seconds to pair specific numbers with given geometric figures. Responses could be written or oral. The performance measure for this task was the total number of correct responses.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

This test requires the participant to name 10 objects drawn in ink. The tester asked the participant to identify the picture. The participant had 20 seconds to respond to each picture presented. The performance measure was the number of objects named correctly.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

The participant was presented with a page that had lines placed across the page. The participant was required to cross out all the lines on the page using their non-paretic hand after the tester had demonstrated what was required by crossing out the center line. The performance measure for this task was the total number of omissions made expressed as a percentage of the total number of items in the test. The test contains 4 variables: (L+R)/28 × 100%, (L/14) × 100%, (R/14) × 100%, and (L-R)/(L+R), where L = number of lines crossed on the left side of the paper; R = number of lines crossed on the right side of the paper.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). n=number of participants included for comparison between active drug and placebo for this outcome measure.

The participant was presented with a page that had lines placed across the page. The participant was required to cross out all the lines on the page using their non-paretic hand after the tester had demonstrated what was required by crossing out the center line. The performance measure for this task was the total number of omissions made expressed as a percentage of the total number of items in the test. The test contains 4 variables: (L+R)/28 × 100%, (L/14) × 100%, (R/14) × 100%, and (L-R)/(L+R), where L = number of lines crossed on the left side of the paper; R = number of lines crossed on the right side of the paper.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Number of participants analyzed indicated participants included for comparison between active drug and placebo for this outcome measure.

This test assesses the ability to recognize pictures of objects. The participant was presented a series of pictures, a subset of which were the objects presented in the RBANS Naming Sub Test. After each picture was presented, the participant indicated either manually (ie, affirmative head nod) or verbally whether the picture was seen previously. The participant was given 5 seconds per picture to respond. The performance measure for this task was the total number of pictures correctly identified.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

The 10-meter walk test requires a 20 meter straight path, with 5 meters for acceleration, 10 meters for steady state walking, and 5 meters for deceleration. Markers were placed at the 5 and 15 meter positions along the path. The participant began to walk "at a comfortable pace" at 1 end of the path, and continued walking until he/she reached the other end. The rater used a stopwatch to determine how much time it took for the participant to traverse the 10 meter center of the path, starting the stopwatch as soon as the participant's limb crossed the first marker and stopping the stopwatch as soon as the participant's limb crossed the second marker.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Participants analyzed indicated number of participants included for comparison between active drug and placebo for this outcome measure.

PK concentration population included all participants who were treated with PF-03049423 who had at least 1 measurable concentration. n=participants with concentration above lower limit of quantification at the corresponding sampling time.

Deaths regardless causality were reported.

The FAS consisted of all randomized participants who took any study medication (active or placebo).

Deaths caused by stroke were reported.

The FAS consisted of all randomized participants who took any study medication (active or placebo).

NIHSS change of 4 points or greater.

The FAS consisted of all randomized participants who took any study medication (active or placebo).

The FAS consisted of all randomized participants who took any study medication (active or placebo).

An AE was defined as any untoward medical occurrence in a participant who received study drug without regard to possibility of causal relationship. Treatment-emergent were events between first dose of study drug and up to 28 days after last dose that were absent before treatment or that worsened relative to pre-treatment state.

The FAS consisted of all randomized participants who took any study medication (active or placebo).

The B&B test is a measure of manual dexterity. The B&B apparatus consists of a box divided into 2 sections and 1-inch hardwood blocks. The blocks began in the compartment of the test box to the dominant side of the participant. The participant was required to transfer the blocks one at a time to the other side of the box as quickly as possible in 1 minute using the non-paretic hand. The box was then turned so all the blocks were in the same side as the paretic hand. The participant was then required to do the test with his/her paretic hand. The participant was told that if more than 1 block was picked up at a time it was to only count as 1 block. The participant was also told that their fingertips needed to cross the partition for the block to be counted. The performance measure for this task was the number of blocks moved within 1 minute.

The I-FAS consisted of participants within the FAS who were randomized to PF-03049423 MTD or highest dose (6 mg) group or the placebo group that was in the same cohort as the MTD or highest dose (6 mg). Number of participants indicated those participants included for comparison between active drug and placebo.