An adverse event was defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the study intervention, whether or not considered related to the use of the product. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition which is temporally associated with the use of the study intervention, was also an adverse event. The number of participants who experienced an AE was reported.

An adverse event was defined as any unfavorable and unintended change in the structure, function, or chemistry of the body temporally associated with the use of the study intervention, whether or not considered related to the use of the product. Any worsening (i.e., any clinically significant adverse change in frequency and/or intensity) of a preexisting condition which is temporally associated with the use of the study intervention, was also an adverse event. The number of participants who discontinued study treatment due to an AE was reported.

Blood samples were collected at pre-specified timepoints on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing of MK-3614 (Day 10) to determine the AUC 0-12hrs of MK-3614 in Panel A participants per protocol. AUC 0-12hrs was defined as the area under the concentration-time curve of MK-3614 from time zero to 12 hours postdose.

Blood samples were collected at pre-specified timepoints to determine the AUC 0-12hrs on first day of multiple dosing of MK-3614 (Day 4) and last day of multiple dosing of MK-3614 (Day 13) to determine the AUC 0-12hrs of MK-3614 in Panel D participants per protocol. AUC 0-12hrs was defined as the area under the concentration-time curve of MK-3614 from time zero to 12 hours postdose.

Blood samples were collected at pre-specified timepoints to determine the AUC 0-inf of MK-3614 in Panel D participants who received single daily dosing on Day 1. AUC 0-inf was defined as the area under the concentration-time curve of MK-3614 from time zero to infinity. Geometric mean and 95%CI were not reported because the single day dosing of MK-3614 was only administered on Day 1 for Panel D participants. Instead, AUC 0-24 hours was reported for Panel D participants on Day 1 which is included in the 'other pre-specified outcomes'.

Blood samples were collected at pre-specified timepoints to determine the AUC 0-24hrs on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing of MK-3614 (Day 10) to determine the AUC 0-24hrs of MK-3614 in Panel B \& C participants per protocol. AUC0-24hrs was defined as the area under the concentration-time curve of MK-3614 from time zero to 24 hours postdose.

Blood samples were collected predose and up to 12 hours postdose on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing (Day 10) for the determination of Cmax in Panel A participants. Cmax was defined as the maximum concentration of MK-3614 reached over 12 hours.

Blood samples were collected at predose and up to 12 hours postdose on first day of multiple dosing of MK-3614 (Day 4) and last day of multiple dosing of MK-3614 (Day 13) for the determination of Cmax in Panel D participants. Cmax was defined as the maximum concentration of MK-3614 reached over 12 hours after administration of multiple doses of MK-3614.

Blood samples were collected at predose and up to 24 hours postdose on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing of MK-3614 (Day 10) for the determination of Cmax in Panel B \& C participants. Cmax was defined as the maximum concentration of MK-3614 reached over 24 hours.

Blood samples were collected at predose and up to 12 hours postdose on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing of MK-3614 (Day 10) to determine the Tmax in Panel A participants. Tmax was defined as time to the maximum concentration of MK-3614 reached over 12 hours.

Blood samples were collected at predose and up to 12 hours on first day of multiple dosing of MK-3614 (Day 4) and last day of multiple dosing of MK-3614 (Day 13) to determine the Tmax in Panel D participants. Tmax was defined as time to the maximum concentration of MK-3614 reached over 12 hours among participants in Panel D.

Blood samples were collected at predose and up to 24 hours on first day of multiple dosing of MK-3614 (Day 1) and last day of multiple dosing of MK-3614 (Day 10) to determine the Tmax in Panel B \& C participants. Tmax was defined as time to the maximum concentration of MK-3614 reached over 24 hours.

Blood samples were collected at pre-specified time points on Day 10 to determine t½ in Panels A, B, \& C participants who received multiple doses of MK-3614. Apparent t½ was defined as the time required to eliminate half the amount of MK-3614 from plasma concentration.

Blood samples were collected at pre-specified time points on Day 13 to determine t½ in Panel D participants who received multiple doses of MK-3614. Apparent t½ was defined as the time required to eliminate half the amount of MK-3614 from plasma concentration.

Aortic AIx is the percentage of the central pulse pressure attributed to the reflected pulse wave, and is an indirect measure of systemic arterial stiffness. Aortic AIx was measured at pre-specified timepoints by aplanation tonometry of radial artery. Linear model containing panel as a fixed effect was used to report the change from baseline in aortic Aix at 24 hours postdose. The 90% confidence intervals (CIs) for the true mean difference (MK-3614-placebo) in change from baseline were obtained using the mean square error from the linear model. Placebo data was pooled across all panels for the analysis. A decrease in the point estimate of ≥ 5 percentage points was considered clinically meaningful.

HR was measured with a validated automatic device. TWA 0-12hrs equals all HR values over 12-hr observation period multiplied by length of time participant spent at each HR value by that HR value; added products together,\& divided by observation period duration. Linear mixed effects model with panel, day, panel by day interaction as fixed effects \& participant-within-panel as random effect was used to generate TWA 0-12hrs on 1st day of single dosing (Panel D: Day 1) or 1st day of multiple dosing of MK-3614/placebo (Panels A,B,C: Day 1; Panel D: Day 4) and last day of multiple dosing of MK-3614/placebo (Panels A,B,C: Day 10; Panel D: Day 13) \& 90% CIs for true TWA using appropriate components of variance. Pooled placebo data at Day 1 indicates first day of single dosing (Panel D: Day 1) \& first day of multiple dosing of placebo (Panels A,B,C: Day 1; Panel D: Day 4) \& at Day 10 indicates last day of multiple dosing of placebo from all panels (Panels A,B,C: Day 10; Panel D: Day 13).

An AE was defined as any untoward medical occurrence in a participant which does not necessarily have a causal relationship with the treatment. An AE was any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with use of a medicinal product, regardless of whether or not it was considered related to the medicinal product. The percentage of participants that reported at least 1 AE was summarized. AEs are reported by the dose taken at the time of the event.

An AE was defined as any untoward medical occurrence in a participant which does not necessarily have a causal relationship with the treatment. An AE was any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with use of a medicinal product, regardless of whether or not it was considered related to the medicinal product. The percentage of participants who were discontinued from the study due to an AE were summarized. AEs are reported by the dose taken at the time of the event.

An AE was defined as any untoward medical occurrence in a participant which does not necessarily have a causal relationship with the treatment. An AE was any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with use of a medicinal product, regardless of whether or not it was considered related to the medicinal product. The percentage of participants that reported at least 1 AE was summarized. The percentage of participants that reported at least 1 AE was summarized. AEs are reported by the dose taken at the time of the event.

An AE was defined as any untoward medical occurrence in a participant which does not necessarily have a causal relationship with the treatment. An AE was any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease temporally associated with use of a medicinal product, regardless of whether or not it was considered related to the medicinal product. The percentage of participants who were discontinued from the study due to an AE were summarized. AEs are reported by the dose taken at the time of the event.

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the AUC0-inf of MK-3614 in healthy participants.

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the Cmax of MK-3614 in healthy participants.

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the Tmax of MK-3614 in healthy participants.

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the t1/2 of MK-3614 in healthy participants.

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the AUC0-inf of MK-3614 in hypertensive participants

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the Cmax of MK-3614 in hypertensive participants

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the Tmax of MK-3614 in hypertensive participants

Blood samples taken at Predose, and 0.5, 1, 2, 4, 6, 8, 12, 16, 24, 36, and 48 hours postdose of each dosing period to determine the t1/2 of MK-3614 in hypertensive participants

Heart rate measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of panel.

Brachial arterial systolic blood pressure measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of panel.

Brachial arterial diastolic blood pressure measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of panel.

HR measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of sequence.

Brachial arterial systolic blood pressure measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of sequence.

Brachial arterial diastolic blood pressure measurements were obtained using a validated, semi-automated oscillometric device. The difference between the predose (baseline) measurement and the measurement 24 obtained 24 hours postdose was summarized. Data for each specific dose were combined regardless of sequnce.