PK and Onset of Hezkue Oral Sildenafil Suspension After Alcohol Consumption

Evaluation of the Pharmacokinetics and Onset Performance of Hezkue® Oral Sildenafil Suspension Following Alcohol Consumption in Healthy Adults

This is an open-label, randomized study evaluating the pharmacokinetics and onset performance of Hezkue® oral sildenafil suspension administered following moderate alcohol consumption in healthy adult subjects. Participants will receive Hezkue® under controlled alcohol-exposure conditions. Pharmacokinetic sampling, onset assessments, and safety evaluations will be conducted throughout the study.

Study Overview

• Status: Not yet recruiting
• Conditions: Healthy Volunteers
• Intervention / Treatment: Drug: Hezkue Oral Sildenafil Suspension

• Study Type: Interventional
• Enrollment (Estimated): 24
• Phase: Phase 1

Contacts and Locations

• Study Contact: Name: Avi Guralnik; Phone Number: 17189381157; Email: avi.berg@synergy-cro.com

Participation Criteria

Eligibility Criteria

• Ages Eligible for Study: Adult; Older Adult
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Male or female adults 21 to 55 years of age, inclusive.

Body mass index (BMI) between 18.0 and 30.0 kg/m², inclusive.

Medically healthy based on medical history, physical examination, vital signs, 12-lead ECG, and clinical laboratory evaluations, in the opinion of the investigator.

Able to safely consume moderate amounts of alcohol as judged by the investigator (for example, no history of alcohol intolerance, alcohol use disorder, or alcohol-related medical complications).

Blood pressure and heart rate within normal or non-clinically significant ranges at screening and baseline, in the opinion of the investigator.

Non-smoker or light smoker (10 cigarettes per day or fewer, or equivalent) willing to abstain during study confinement periods.

Able to understand and provide written informed consent before any study-specific procedures are performed.

Willing and able to comply with all study requirements, including alcohol restrictions, fasting, dosing schedules, and pharmacokinetic and onset assessments.

Females of childbearing potential must use acceptable contraception as determined by the investigator.

Exclusion Criteria:

• History or presence of any clinically significant cardiovascular disease, including but not limited to coronary artery disease, heart failure, clinically important arrhythmias, or uncontrolled hypertension or hypotension.

Resting systolic blood pressure or diastolic blood pressure, or heart rate, outside protocol-defined acceptable ranges at screening or baseline, in the opinion of the investigator.

Known hypersensitivity or contraindication to sildenafil, other phosphodiesterase type 5 (PDE5) inhibitors, alcohol, or any component of the study formulations.

Current or recent use of nitrates, nitric oxide donors, or guanylate cyclase stimulators (for example, riociguat).

History of significant hepatic, renal, gastrointestinal, neurologic, psychiatric, endocrine, hematologic, or respiratory disease that, in the investigator's opinion, could interfere with study participation or data interpretation.

History of syncope, significant orthostatic hypotension, or other conditions that may be worsened by sildenafil or alcohol.

History of alcohol use disorder, binge drinking patterns, or other substance use disorder, as determined by the investigator.

Positive urine drug screen or positive alcohol test at screening (outside scheduled alcohol administration for the study) or at admission.

Use of prescription or over-the-counter medications, herbal products, or dietary supplements within 14 days before the first study dose, unless considered acceptable by the investigator.

Positive test for hepatitis B surface antigen, hepatitis C antibody, or HIV.

Participation in another clinical study or receipt of an investigational drug or device within 30 days or 5 half-lives (whichever is longer) before the first study dose.

Donation of 450 mL or more of blood, or significant blood loss, within 8 weeks before the first study dose.

Pregnant or breastfeeding females.

Women of childbearing potential not using acceptable contraception.

Any condition or circumstance that, in the opinion of the investigator, would make the participant unsuitable for the study or could interfere with compliance or study assessments.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Other
• Allocation: N/A
• Interventional Model: Crossover Assignment
• Masking: None (Open Label)

Number of Arms

1

Arms and Interventions

Participant Group / Arm	Intervention / Treatment
Experimental: Single-Arm Crossover	Drug: Hezkue Oral Sildenafil Suspension; Hezkue® oral sildenafil suspension will be administered as a single oral dose following controlled moderate alcohol consumption under fasting or standardized conditions, according to the study schedule, to evaluate pharmacokinetics, onset performance, and safety.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Area Under the Plasma Concentration-Time Curve from Time Zero to Last Quantifiable Concentration (AUC₀-t) of Sildenafil	From predose up to approximately 24 hours postdose in each study period
Maximum Observed Plasma Concentration (Cmax) of Sildenafil	From predose up to approximately 24 hours postdose in each study period
Time to Onset of Effect as Assessed by Participant-Reported Onset	From dosing up to approximately 4 hours postdose in each study period

Collaborators and Investigators

• Sponsor: Aspargo Labs, Inc

Study record dates

Study Major Dates

• Study Start (Estimated): March 15, 2026
• Primary Completion (Estimated): May 15, 2026
• Study Completion (Estimated): May 28, 2026

Study Registration Dates

• First Submitted: December 11, 2025
• First Submitted That Met QC Criteria: December 11, 2025
• First Posted (Actual): December 24, 2025

Study Record Updates

• Last Update Posted (Actual): December 24, 2025
• Last Update Submitted That Met QC Criteria: December 11, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Other Study ID Numbers: ASP-021-Sil

Plan for Individual participant data (IPD)

• Plan to Share Individual Participant Data (IPD)?: NO

Drug and device information, study documents

• Studies a U.S. FDA-regulated drug product: Yes
• Studies a U.S. FDA-regulated device product: No
• product manufactured in and exported from the U.S.: No