Tolerability Study of Liquid Metformin (100 and 250 mg/mL) vs IR Tablets

A Randomized Study to Assess the Tolerability Profile of Two Concentrations of Liquid Metformin (100 mg/mL and 250 mg/mL) Compared With Standard Metformin Tablets

This is an open-label, randomized study evaluating the tolerability of two concentrations of liquid metformin formulations (100 mg/mL and 250 mg/mL) compared with standard immediate-release metformin tablets in healthy adult subjects. Each participant will receive single oral doses of study treatments in a randomized sequence. Safety and tolerability will be assessed through adverse event monitoring, gastrointestinal symptom evaluations, vital signs, clinical laboratory tests, and ECGs.

Study Overview

• Status: Not yet recruiting
• Conditions: Healthy Volunteers
• Intervention / Treatment: Drug: Liquid Metformin 100 mg/mL; Drug: Liquid Metformin 250 mg/mL; Drug: Standard Metformin Immediate-Release Tablet

• 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
• Accepts Healthy Volunteers: Yes

Description

Inclusion Criteria:

• Male or female adults 18 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, clinical laboratory evaluations, and 12-lead ECG, 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 provide written informed consent before any study-specific procedures are conducted.

Willing and able to comply with all study requirements, including fasting, dosing restrictions, and safety/tolerability assessments.

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

Exclusion Criteria:

• Known hypersensitivity or contraindication to metformin or any excipients in the study formulations.

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

Estimated glomerular filtration rate (eGFR) < 90 mL/min/1.73 m², or any clinically significant abnormal clinical laboratory findings.

Prior history of lactic acidosis.

Current or recent (within 14 days before first dose) use of prescription drugs, over-the-counter medications, herbal products, or dietary supplements, unless approved by the investigator.

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

Positive urine drug screen or positive alcohol breath test at screening or at check-in.

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

Donation of ≥450 mL 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 finding that, in the opinion of the investigator, would make the subject unsuitable for the study.

Study Plan

How is the study designed?

Design Details

• Primary Purpose: Supportive Care
• 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: Liquid Metformin 100 mg/mL; A single oral dose of a liquid metformin formulation at a concentration of 100 mg/mL will be administered under fasting conditions in one period of the crossover to assess tolerability and safety.; Drug: Liquid Metformin 250 mg/mL; A single oral dose of a liquid metformin formulation at a concentration of 250 mg/mL will be administered under fasting conditions in one period of the crossover to assess tolerability and safety.; Drug: Standard Metformin Immediate-Release Tablet; A single oral dose of standard immediate-release metformin tablet(s) will be administered under fasting conditions in one period of the crossover to assess tolerability and safety.

What is the study measuring?

Primary Outcome Measures

Outcome Measure	Time Frame
Incidence of Gastrointestinal Treatment-Emergent Adverse Events (GI TEAEs)	From each study dose through 24 hours postdose in each treatment period
Severity of Gastrointestinal Treatment-Emergent Adverse Events	From each study dose through 24 hours postdose in each treatment period

Collaborators and Investigators

• Sponsor: Aspargo Labs, Inc

Study record dates

Study Major Dates

• Study Start (Estimated): June 15, 2026
• Primary Completion (Estimated): August 15, 2026
• Study Completion (Estimated): August 28, 2026

Study Registration Dates

• First Submitted: December 10, 2025
• First Submitted That Met QC Criteria: December 10, 2025
• First Posted (Actual): December 23, 2025

Study Record Updates

• Last Update Posted (Actual): December 23, 2025
• Last Update Submitted That Met QC Criteria: December 10, 2025
• Last Verified: November 1, 2025

More Information

Terms related to this study

• Other Study ID Numbers: ASP-019-Met

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