An orthostatic measurement is obtained by subtracting the supine measurement from the standing measurement.

An orthostatic measurement is obtained by subtracting the supine measurement from the standing measurement.

An orthostatic measurement is obtained by subtracting the supine measurement from the standing measurement.

24-hour average is the average of ABPM assessments over 24 hour intervals from the time of dosing. Time-matched baseline is the 24 hours average during Day -1.

Daytime 12-hour average is the average of ABPM assessments over daytime 12-hour intervals from the time of dosing. Time-matched baseline is the daytime 12 hours average during Day -1.

Nighttime 12-hour average is the average of ABPM assessments over nighttime 12-hour intervals from the time of dosing. Time-matched baseline is the nighttime 12 hours average during Day -1.

Postdose is the average of assessments over 4-hour intervals from the time of dosing that day. Time-matched baseline is the corresponding 4-hour average on Day -1.

24-hour average is the average of ABPM assessments over 24 hour intervals from the time of dosing. Time-matched baseline is the 24 hours average during Day -1.

Daytime 12-hour average is the average of ABPM assessments over daytime 12-hour intervals from the time of dosing. Time-matched baseline is the daytime 12 hours average during Day -1.

Nighttime 12-hour average is the average of ABPM assessments over nighttime 12-hour intervals from the time of dosing. Time-matched baseline is the nighttime 12 hours average during Day -1.

Postdose is the average of assessments over 4-hour intervals from the time of dosing that day. Time-matched baseline is the corresponding 4-hour average on Day -1.

24-hour average is the average of ABPM assessments over 24 hour intervals from the time of dosing. Time-matched baseline is the 24 hours average during Day -1.

Daytime 12-hour average is the average of ABPM assessments over daytime 12-hour intervals from the time of dosing. Time-matched baseline is the daytime 12 hours average during Day -1.

Nighttime 12-hour average is the average of ABPM assessments over nighttime 12-hour intervals from the time of dosing. Time-matched baseline is the nighttime 12 hours average during Day -1.

Postdose is the average of assessments over 4-hour intervals from the time of dosing that day. Time-matched baseline is the corresponding 4-hour average on Day -1.

24-hour average is the average of ABPM assessments over 24 hour intervals from the time of dosing. Time-matched baseline is the 24 hours average during Day -1.

Daytime 12-hour average is the average of ABPM assessments over daytime 12-hour intervals from the time of dosing. Time-matched baseline is the daytime 12 hours average during Day -1.

Nighttime 12-hour average is the average of ABPM assessments over nighttime 12-hour intervals from the time of dosing. Time-matched baseline is the nighttime 12 hours average during Day -1.

Postdose is the average of assessments over 4-hour intervals from the time of dosing that day. Time-matched baseline is the corresponding 4-hour average on Day -1.

RHI is a measure of the extent of vessel dilatation and augmentation in vascular blood flow after a prespecified period of flow interruption. RHI is determined as the ratio of the post-to-pre- occlusion peripheral arterial tonometry amplitude of the tested (occluded) arm, divided by the post to-pre-occlusion ratio of the control arm. RHI values \>1.67 indicate normal endothelial function, while values ≤1.67 indicate endothelial dysfunction.

Platelet reactivity, as measured by VerifyNow PRU assay, and presented as number of participants with \< 180 PRU or ≥ 180 PRU post-baseline (Days 8 and 14), by baseline category. The VerifyNow PRU assay measures effects on platelet activation caused by inhibition of the platelet receptor, P2Y12. This receptor is activated by adenosine 5'-diphosphate (ADP) in the cascade leading to platelet aggregation but can be blocked by P2Y12 inhibitor drugs, such as clopidogrel. Blockage of this receptor diminishes platelet activation and the ability of platelets to bind to fibrinogen. VerifyNow PRU assay values \< 180 units indicate impairment of platelet aggregation.

Platelet reactivity, as measured by VerifyNow ARU assay, and presented as number of participants with ≤ 549 ARU or \> 549 ARU post-baseline (Days 8 and 14), by baseline category. Aspirin irreversibly inhibits cyclooxygenase 1, which converts arachidonic acid to thromboxane A2, which in turn is involved in the activation of the glycoprotein (GP)IIb/IIIa receptor necessary to initiate platelet aggregation. Impairment of platelet aggregation of the aspirin type is defined for the VerifyNow aspirin assay as values ≤ 549 ARU.

The VerifyNow PRU assay measures effects on platelet activation caused by inhibition of the platelet receptor, P2Y12. This receptor is activated by adenosine 5'-diphosphate (ADP) in the cascade leading to platelet aggregation but can be blocked by P2Y12 inhibitor drugs, such as clopidogrel. Blockage of this receptor diminishes platelet activation and the ability of platelets to bind to fibrinogen. VerifyNow PRU assay values \<180 PRU indicate impairment of platelet aggregation.

Aspirin irreversibly inhibits cyclooxygenase 1, which converts arachidonic acid to thromboxane A2, which in turn is involved in the activation of the GPIIb IIIa receptor necessary to initiate platelet aggregation. Impairment of platelet aggregation of the aspirin type is defined for the VerifyNow aspirin assay as values ≤ 549 ARU.

Blood samples were taken for fasting glucose and insulin levels. From these results, insulin resistance was then estimated using the updated homeostasis model assessment method for insulin resistance (HOMA-IR) computer algorithm. A higher HOMA-IR indicates a higher degree of insulin resistance. Typically a cutoff of HOMA-IR for identifying those with insulin resistance is 2.5.

Equivalent to AUC from time 0 to the last measurable concentration (AUClast), with time of last measurable concentration (Tlast)=12 hours for BID dosing and Tlast=24 hours for QD dosing.

An adverse event (AE) is any untoward medical occurrence, which does not necessarily have to have a causal relationship with study treatment. An SAE is defined as any AE occurring at any dose that results in any of the following outcomes: death; life-threatening; hospitalization or prolongation of existing hospitalization; persistent or significant disability/incapacity; congenital anomaly/birth defect; important medical events. TEAEs are defined as those AEs that started or worsened in severity after the initiation of study drug administration. AEs of clinical interest (AECI) included those related to bleeding and to hypotension. Study drug causality as assessed by the Investigator who was blinded to study drug assignment.

Supine systolic blood pressure (SSBP): ≥ 180 mmHg and increase (↑) from baseline (BL) ≥ 30 mmHg; ≤ 90 mmHg and decrease (↓) from BL ≥ 30 mmHg. Supine diastolic blood pressure (SDBP): ≥ 105 mmHg and ↑ from BL ≥ 20 mmHg; ≤ 50 mmHg and ↓ from BL ≥ 20 mmHg. Supine heart rate (SHR): ≥ 110 bpm and ↑ from BL ≥ 20 bpm; ≤ 50 bpm and ↓ from BL ≥ 20 bpm. Standing systolic blood pressure (StSBP): ≥ 180 mmHg and increase (↑) from baseline (BL) ≥ 30 mmHg; ≤ 90 mmHg and decrease (↓) from BL ≥ 30 mmHg. Standing Diastolic Blood Pressure (StDBP): ≥ 105 mmHg and ↑ from BL ≥ 20 mmHg; ≤ 50 mmHg and ↓ from BL ≥ 20 mmHg. Standing heart rate (StHR): ≥ 110 bpm and ↑ from BL ≥ 20 bpm; ≤ 50 bpm and ↓ from BL ≥ 20 bpm. Orthostatic systolic blood pressure (SBP): ↓ \> 20 mmHg from supine to standing. Orthostatic diastolic blood pressure (DBP): ↓ \> 15 mmHg from supine to standing. Orthostatic HR: ↓ \> 30 bpm from supine to standing.

Physical examinations included examination and assessment of the following: general appearance, lymph nodes, skin, cardiovascular system, head, eyes, ears, nose, and throat, central nervous system, respiratory system, neck, peripheral nervous system, abdomen/liver/spleen, musculoskeletal system.

An adverse event (AE) is any untoward medical occurrence, which does not necessarily have to have a causal relationship with study treatment. An SAE is defined as any AE occurring at any dose that results in any of the following outcomes: death; life-threatening; hospitalization or prolongation of existing hospitalization; persistent or significant disability/incapacity; congenital anomaly/birth defect; important medical events. TEAEs are defined as those AEs that started or worsened in severity after the initiation of study drug administration.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Study baseline is defined as the Day -1 assessment.

Time-matched baseline is defined as the corresponding assessment on Day 2 of the placebo cycle. Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment). To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose are presented as the second row of data.

Time-matched baseline is defined as the corresponding assessment on Day 2 of the placebo cycle. Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment). To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose are presented as the second row of data.

Supine systolic blood pressure (SSBP): ≥ 180 mmHg and increase (↑) from baseline (BL) ≥ 30 mmHg; ≤ 90 mmHg and decrease (↓) from BL ≥ 30 mmHg. Supine Diastolic Blood Pressure (SDBP): ≥ 105 mmHg and ↑ from BL ≥ 20 mmHg; ≤ 50 mmHg and ↓ from BL ≥ 20 mmHg. Supine pulse rate (SPR): ≥ 110 beats per minute (bpm) and ↑ from BL ≥ 20 bpm; ≤ 50 bpm and ↓ from BL ≥ 20 bpm. Standing systolic blood pressure (StSBP): ≥ 180 mmHg and increase (↑) from baseline (BL) ≥ 30 mmHg; ≤ 90 mmHg and decrease (↓) from BL ≥ 30 mmHg. Standing Diastolic Blood Pressure (StDBP): ≥ 105 mmHg and ↑ from BL ≥ 20 mmHg; ≤ 50 mmHg and ↓ from BL ≥ 20 mmHg. Standing pulse rate (StPR): ≥ 110 beats per minute (bpm) and ↑ from BL ≥ 20 bpm; ≤ 50 bpm and ↓ from BL ≥ 20 bpm.

Systolic blood pressure (SBP): Decrease of \> 20 mmHg from supine to standing Diastolic blood pressure (DBP): Decrease of \> 10 mmHg from supine to standing Pulse rate (PR): Increase of \> 20 bpm from supine to standing.

Time-matched baseline for each timepoint is defined as the corresponding assessment during the placebo cycle. Baseline is designated per protocol as Day 1 or 3 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 1 or 3 of each IW-1973 dose at given time point are presented as the second row of data.

Time-matched baseline for each timepoint is defined as the corresponding assessment during the placebo cycle. Baseline is designated per protocol as Day 1 or 3 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 1 or 3 of each IW-1973 dose at given time point are presented as the second row of data.

Time-matched baseline for each timepoint is defined as the corresponding assessment during the placebo cycle. Baseline is designated per protocol as Day 1 or 3 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 1 or 3 of each IW-1973 dose at given time point are presented as the second row of data.

Four-hour average is the average of ABPM assessments over 4 hours intervals from the time of dosing. Time-matched baseline is the 4 hours average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Thirty-minute average is the average of ABPM assessments over 30 minutes intervals from the time of dosing. Time-matched baseline is the 30 minutes average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Daytime average is the average of ABPM assessments over 12 hours from the time of dosing. Time-matched baseline is the daytime average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Four-hour average is the average of ABPM assessments over 4 hours intervals from the time of dosing. Time-matched baseline is the 4 hours average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Thirty-minute average is the average of ABPM assessments over 30 minutes intervals from the time of dosing. Time-matched baseline is the 30 minutes average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Daytime average is the average of ABPM assessments over 12 hours from the time of dosing. Time-matched baseline is the daytime average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment). To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose are presented as the second row of data.

Four-hour average is the average of ABPM assessments over 4 hours intervals from the time of dosing. Time-matched baseline is the 4 hours average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Thirty-minute average is the average of ABPM assessments over 30 minutes intervals from the time of dosing. Time-matched baseline is the 30 minutes average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Daytime average is the average of ABPM assessments over 12 hours from the time of dosing. Time-matched baseline is the daytime average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment). To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose are presented as the second row of data.

Four-hour average is the average of ABPM assessments over 4 hours intervals from the time of dosing. Time-matched baseline is the 4 hours average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Thirty-minute average is the average of ABPM assessments over 30 minutes intervals from the time of dosing. Time-matched baseline is the 30 minutes average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose at given time point are presented as the second row of data.

Daytime average is the average of ABPM assessments over 12 hours from the time of dosing. Time-matched baseline is the daytime average during the placebo cycle (Day 2). Baseline is designated per protocol as Day 2 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment). To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 2 of each IW-1973 dose are presented as the second row of data.

Study baseline is defined as the Day -1 assessment. Endothelial function was assessed by RHI value determined using the noninvasive EndoPAT™ (Itamar Medical; Caesarea, Israel) device. RHI is a validated measure of endothelial function, with a higher RHI indicating better endothelial function compared to a lower value. The full EndoPAT 2000 user manual (software version 3.7.x) recommends using RHI values \>1.67 as a cutoff for normal endothelial function, with values ≤1.67 indicating endothelial dysfunction.

Time-matched baseline for each timepoint is defined as the corresponding assessment during the placebo cycle. Endothelial function was assessed by RHI value determined using the noninvasive EndoPAT™ (Itamar Medical; Caesarea, Israel) device. RHI is a validated measure of endothelial function, with a higher RHI indicating better endothelial function compared to a lower value. The full EndoPAT 2000 user manual (software version 3.7.x) recommends using RHI values \>1.67 as a cutoff for normal endothelial function, with values ≤1.67 indicating endothelial dysfunction. Baseline is designated per protocol as Day 3 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 3 of each IW-1973 dose at given time point are presented as the second row of data.

Endothelial function was assessed by RHI value determined using the noninvasive EndoPAT™ (Itamar Medical; Caesarea, Israel) device. RHI is a validated measure of endothelial function, with a higher RHI indicating better endothelial function compared to a lower value. The full EndoPAT 2000 user manual (software version 3.7.x) recommends using RHI values \>1.67 as a cutoff for normal endothelial function, with values ≤1.67 indicating endothelial dysfunction.

Time-matched baseline is defined as the corresponding assessment on Day 1 of the placebo cycle. Platelet function assessment used the PFA-100® instrument to evaluate collagen/epinephrine time to aggregation. Baseline is designated per protocol as Day 1 of the placebo cycle (Days 1-3; i.e., the first cycle of treatment) at given time point. To present 'change from time-matched baseline' endpoints, the values for time-matched baseline are presented as the first row of data, and the changes at Day 1 of each IW-1973 dose at given time point are presented as the second row of data.