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Metformin

Glucophage · Fortamet · Riomet

Metabolic & Circadian HormonesApproved
MW
129.16g/mol
Formula
C4H11N5

Metformin, a biguanide derived from the plant Galega officinalis, is primarily recognized as an oral antihyperglycemic agent used in the management of type 2 diabetes mellitus. Researchers primarily study metformin for its effects on glucose metabolism, insulin sensitivity, and potential benefits beyond diabetes, including its role in aging and various diseases. Key findings indicate that metformin not only lowers blood glucose levels but also enhances autophagy, modulates mitochondrial function, and may have protective effects against age-related disorders and certain cancers. Current research continues to explore metformin's broader therapeutic applications, including its potential to extend healthspan and mitigate conditions such as polycystic ovary syndrome and neurodegenerative diseases. Clinical evidence indicates that metformin remains a cornerstone in diabetes management while also garnering interest for its multifaceted roles in health and disease.

Overview

Übersicht

Metformin is a synthetic biguanide compound primarily used as an oral antihyperglycemic agent. It is not an endogenous hormone but is derived from the plant Galega officinalis, which contains guanidine, a precursor to metformin. Metformin belongs to the chemical class of biguanides and is widely recognized for its role in managing type 2 diabetes mellitus. Researchers have found that metformin's primary physiological role is to lower blood glucose levels by improving insulin sensitivity, particularly in the liver and muscle tissues. It is also being explored for its potential benefits in treating other conditions such as polycystic ovary syndrome, aging, and various metabolic disorders. Metformin's mechanism of action involves the activation of AMP-activated protein kinase (AMPK), which plays a crucial role in cellular energy homeostasis. This activation leads to decreased hepatic glucose production, increased insulin sensitivity, and enhanced peripheral glucose uptake. Additionally, metformin affects the gut microbiome and increases GLP-1 levels, contributing to its glucose-lowering effects. Pharmacokinetically, metformin has an oral bioavailability of 50-60% and is not metabolized by the liver. It is excreted unchanged in the urine, with a half-life of approximately 4-8 hours. Clinically, metformin is the first-line treatment for type 2 diabetes and is approved by regulatory agencies worldwide. It is available in immediate and extended-release formulations to mitigate gastrointestinal side effects, which are common but typically manageable with dose adjustments. Researchers continue to investigate its broader therapeutic applications, including its potential role in longevity and disease prevention.

Chemical profile

Chemische Struktur

Chemical structure of Metformin
FormelC4H11N5
Molekulargewicht129.16g/mol
CAS-Nummer657-24-9
PubChem CID4091
Mechanism

Wirkmechanismus

Metformin primarily acts by activating AMP-activated protein kinase (AMPK), a key regulator of energy balance. This activation leads to decreased hepatic glucose production and increased insulin sensitivity, contributing to its antihyperglycemic effects. Additionally, metformin influences the gut microbiome and increases GLP-1 levels, further aiding in glucose regulation.

Mechanism

Signalweg

Metformin primarily acts through the activation of AMP-activated protein kinase (AMPK), which enhances insulin sensitivity and promotes glucose uptake in peripheral tissues. It also inhibits hepatic gluconeogenesis via the suppression of the cAMP/PKA pathway and reduces intestinal glucose absorption while increasing GLP-1 secretion, contributing to improved glycemic control. Additionally, metformin's effects on the gut microbiome and alterations in bile acid metabolism are emerging areas of research, although the complete mechanisms remain not fully understood.

Half-Life & Pharmacokinetics

POOral

Approximately 4-8 hours

Metformin is excreted unchanged in the urine, and its bioavailability is 50-60% due to limited absorption in the gastrointestinal tract.

Storage

Temperature

Store at room temperature (15-30C)

Light

Protect from light

Form

Available in tablet form, both immediate and extended-release

Notes

Keep in a tightly closed container to protect from moisture.

Solubility

Löslichkeit

Metformin is soluble in water, which is relevant for its formulation as an oral tablet.

Legal Status

🇩🇪DE

Metformin is a prescription medication (verschreibungspflichtig) in Germany.

🇺🇸US

Metformin is FDA-approved for the treatment of type 2 diabetes and is available by prescription.

🇦🇺AU

In Australia, metformin is classified as a Schedule 4 (S4) prescription-only medicine.

🇬🇧UK

In the UK, metformin is a prescription-only medicine (POM) regulated by the MHRA.

Legal status information is provided for general reference only and may not reflect the most current regulatory changes. Always verify with official government sources before making any decisions.

Open Questions

Offene Forschungsfragen

Current evidence is limited regarding the underlying mechanisms of gastrointestinal intolerance associated with metformin, necessitating further research into the genetic and microbiome factors that influence individual responses. Additionally, while metformin shows promise in treating various conditions beyond type 2 diabetes, including aging and neurodegenerative diseases, larger randomized controlled trials are needed to establish its efficacy and safety in these contexts. Furthermore, there is a need for long-term studies to clarify the potential benefits and risks of metformin in diverse populations, including those with comorbidities and varying genetic backgrounds.

88 Research Publications

6,835

Total Citations

21

Human/RCT

5.6

Avg. Influence

2025

Latest

Sort
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#01

Metformin alters the gut microbiome of individuals with treatment-naive type 2 diabetes, contributing to the therapeutic effects of the drug.

Wu Hao, et al. · Nature medicine · 2017

HumanInfluence59.0
1418
The study demonstrated that metformin alters the gut microbiome in individuals with treatment-naive type 2 diabetes, contributing to its therapeutic effects on glucose tolerance.

Key findings

  1. 01Metformin alters the gut microbiome in individuals with type 2 diabetes.
  2. 02These microbiome changes are linked to improved blood sugar control.
  3. 03Experiments with mice suggest that the altered gut bacteria contribute to metformin's effects.
#02

Metformin: historical overview.

Bailey Clifford J · Diabetologia · 2017

ReviewInfluence36.0
909
Researchers observed that metformin's journey from a herbal remedy to a widely prescribed diabetes medication highlights its unique benefits and long-term cardiovascular advantages, establishing it as a cornerstone in diabetes management.

Key findings

  1. 01Metformin was rediscovered in the 1940s and first used for diabetes in 1957.
  2. 02It gained popularity after being shown to have cardiovascular benefits in the UK Prospective Diabetes Study.
  3. 03Metformin is now the most prescribed glucose-lowering medication worldwide.
#03

Metformin and the gastrointestinal tract.

McCreight Laura J, et al. · Diabetologia · 2016

ReviewInfluence12.0
659
The study demonstrated that metformin acts within the gut to enhance glucose uptake, increase GLP-1 concentrations, and alter the microbiome, contributing to its therapeutic effects in type 2 diabetes.

Key findings

  1. 01Metformin affects glucose uptake and lactate production in the gut.
  2. 02A new delayed-release formulation shows similar effectiveness with fewer side effects.
  3. 03The gut's role is important in how individuals respond to metformin.
#04

Benefits of Metformin in Attenuating the Hallmarks of Aging.

Kulkarni Ameya S, et al. · Cell metabolism · 2020

ReviewInfluence14.0
642
The study demonstrated that metformin may attenuate the hallmarks of aging by enhancing autophagy, improving nutrient sensing, and modulating mitochondrial function, positioning it as a potential gerotherapeutic.

Key findings

  1. 01Metformin improves nutrient sensing and enhances cell communication.
  2. 02It protects against cellular damage and delays stem cell aging.
  3. 03Metformin shows potential as a treatment to target aging in humans.
#05

Metformin: multi-faceted protection against cancer.

ReviewInfluence14.0
301
Researchers observed that metformin may exert cancer chemopreventive effects by targeting similar molecular pathways as current cancer therapies, suggesting its potential as an adjunct treatment in oncology.
#06

Understanding and overcoming metformin gastrointestinal intolerance.

Bonnet Fabrice & Scheen André · Diabetes, obesity & metabolism · 2017

ReviewInfluence5.0
231
Researchers observed that gastrointestinal intolerance to metformin can be mitigated through appropriate dosing strategies and alternative formulations, although some patients may remain intolerant despite these efforts.

Key findings

  1. 01Gastrointestinal side effects are common with metformin, affecting patient adherence.
  2. 02Starting with a low dose and increasing slowly may reduce side effects.
  3. 03Alternative therapies should be considered if metformin is not tolerated.
#07

Metformin: Is it a drug for all reasons and diseases?

Triggle Chris R, et al. · Metabolism: clinical and experimental · 2022

ReviewInfluence6.0
229
Researchers observed that metformin's insulin-sensitizing effects contribute to a reduced risk of various diseases, suggesting its potential utility beyond type 2 diabetes management.

Key findings

  1. 01Metformin is primarily effective for type 2 diabetes but shows promise for other diseases.
  2. 02It may help reduce cancer incidence and protect against neurodegenerative diseases.
  3. 03The drug's benefits may extend beyond blood sugar control, enhancing overall health.
#08

Metformin as Anti-Aging Therapy: Is It for Everyone?

ReviewInfluence4.0
220
Researchers observed that while metformin may reduce the incidence of aging-related diseases in humans, the mechanisms behind its anti-aging effects remain largely unknown and vary among individuals.
#09

Lactic acidosis induced by metformin: incidence, management and prevention.

ReviewInfluence4.0
196
Researchers concluded that while lactic acidosis is a rare event associated with metformin, its direct mortality risk is negligible, suggesting the need for careful patient management.
#10

Metformin and other antidiabetic agents in renal failure patients.

ReviewInfluence7.0
148
The study demonstrated that metformin's use in patients with chronic kidney disease raises concerns about lactic acidosis, necessitating a careful evaluation of its benefits and risks.

Clinical Trials (69)

Preclinical
Phase I
Phase II
Phase III
Approved

69

Total Trials

15,411

Total Enrolled

Metformin Hydrochloride and Empagliflozin Tablets in the Treatment of Type 2 Diabetes

NCT07003191ACTIVE_NOT_RECRUITING
Sponsor

Sun Yat-sen University

Enrollment

2,600

Started

2023

Primary outcome

6-month clinical glycemic control rate

Type 2 Diabetes

Pre-diabetes in Subject With Impaired Fasting Glucose (IFG) and Impaired Glucose Tolerance (IGT)

NCT02969798RECRUITING
Sponsor

The University of Texas Health Science Center at San Antonio

Enrollment

700

Started

2014

Primary outcome

Beta cell function

Diabetes Mellitus, Type 2Impaired Glucose Tolerance (IGT)Impaired Fasting Glucose (IFG)

Efficacy and Safety of Henagliflozin, Retagliptin, and Metformin Extended-Release Tablets in Chinese Patients With Type 2 Diabetes Mellitus

NCT07441187NOT_YET_RECRUITING
Sponsor

Xinhua Hospital, Shanghai Jiao Tong University School of Medicine

Enrollment

300

Started

2026

Primary outcome

Change in HbA1c from baseline to Week 24.

T2DM (Type 2 Diabetes Mellitus)

N-acetyl Cysteine and Clomiphene Citrate or Metformin and Clomiphene Citrate for Women With CC Resistant Polycystic Ovary Syndrome (PCOS).

NCT01008046COMPLETED
Sponsor

Mansoura University

Enrollment

192

Started

2007

Primary outcome

Ovulation rate

Polycystic Ovary Syndrome

Late Metabolic Effects of Metformin Therapy in Gestational Diabetes

NCT02417090COMPLETED
Sponsor

Turku University Hospital

Enrollment

173

Started

2015

Primary outcome

Metabolic late effects

Gestational Diabetes

Myoinositol vs. Metformin for Polycystic Ovarian Syndrome (PCOS): Impact on Metabolic Health and Fertility

NCT07058675COMPLETED
Sponsor

Benha University

Enrollment

156

Started

2024

Primary outcome

Success Rate of Treatment Regimens in Restoring Menstrual Regularity and/or Achieving Pregnancy

PCOS

Comparative Effects of Metformin and Insulin on Stereological Studies and Immunohistochemistry of Placenta

NCT04907708COMPLETED
Sponsor

University of Karachi

Enrollment

156

Started

2018

Primary outcome

Mean morphometric diffusion capacity for oxygen (MMDC) in placental tissues

Diabetes Mellitus Arising in Pregnancy, Insulin-RequiringDiabetes Mellitus in Pregnancy

Metformin and Molecular Aging in Prediabetes

NCT07302932COMPLETED
Sponsor

Diabetes Foundation, India

Enrollment

112

Started

2023

Primary outcome

Leukocyte telomerase length

Metformin, Prediabetes

Comparison of the Therapeutic Effects of VR and VR + Metformin in the Treatment of Cesarean Section Scar Defect

NCT05205317RECRUITING
Sponsor

Xinhua Hospital, Shanghai Jiao Tong University School of Medicine

Enrollment

100

Started

2023

Primary outcome

Duration of menstruation (day)

Defect

Effect of Lifestyle and/or Metformin Intervention on Pregnancy Outcome, A Pilot Randomized Controlled Trial

NCT03898037COMPLETED
Sponsor

Reproductive & Genetic Hospital of CITIC-Xiangya

Enrollment

80

Started

2019

Primary outcome

recruitment rate

Infertility, FemaleObesityInsulin Resistance

Metformin+ Drospirenone/ethinylestradiol30µg and Flow-mediated Dilation in Polycystic Ovary Syndrome

Sponsor

Iuliu Hatieganu University of Medicine and Pharmacy

Enrollment

26

Started

2011

Primary outcome

flow-mediated dilation

Polycystic Ovary SyndromeEndothelial Dysfunction

Metformin for Weight Loss in Schizophrenia

NCT01177709TERMINATED
Sponsor

Nathan Kline Institute for Psychiatric Research

Enrollment

12

Started

2008

Primary outcome

Weight (wt) in Pounds (Lbs)..

SchizophreniaObesity

The Impact of Gall Bladder Emptying and Bile Acids on the Human GLP-1-secretion

NCT01656057COMPLETED
Sponsor

Filip Krag Knop

Enrollment

10

Started

2012

Primary outcome

GLP-1 response as incremental area under curve (iAUC)

To Assess the Impact of Bile Acids on Human Glukagon-like-peptide-1 Secretion

Sitagliptin Therapy in Hospitalized Patients With Type 2 Diabetes

NCT01845831Phase 4COMPLETED
Sponsor

Emory University

Enrollment

292

Started

2013

Primary outcome

Mean Blood Glucose Concentration After First Day of Treatment

Type 2 Diabetes

Pegylated-Interferon and Ribavirin Plus Metformin in the Treatment of Chronic HCV Infection and Insulin Resistance

NCT00370617Phase 4UNKNOWN
Sponsor

University of Turin, Italy

Enrollment

200

Started

2006

Primary outcome

Combined end-point of non-detectable serum HCV-RNA (<100 copies/mL) and

Chronic Hepatitis CInsulin Resistance

Metformin Combined With Secukinumab for Moderate-to-Severe Plaque Psoriasis in Overweight or Obese Chinese Patients

NCT07485764Phase 4NOT_YET_RECRUITING
Sponsor

Union Hospital, Tongji Medical College, Huazhong University of Science and Technology

Enrollment

186

Started

2026

Primary outcome

Proportion of Participants Achieving PASI75 at Week 24

PsoriasisPlaque PsoriasisModerate-to-severe Plaque PsoriasisOverweight , Obesity

Metformin in Assisted Reproduction-MET-AR-study

NCT00159575Phase 4TERMINATED
Sponsor

Norwegian University of Science and Technology

Enrollment

150

Started

2005

Primary outcome

To investigate whether four months of Metformin treatment before IVF (in-vitro-fertilisation) or ICSI (intra-cytoplasmic sperm injection) will increase clinical pregnancy rate in normal weight PCOS-women

Polycystic Ovary Syndrome

Metformin for Antipsychotic-induced Weight Gain in Adults With Intellectual Disability

NCT05744479Phase 4RECRUITING
Sponsor

Centre for Addiction and Mental Health

Enrollment

100

Started

2023

Primary outcome

Individual's percentage change in body weight

Intellectual DisabilityDevelopmental DisabilityObesity

Second-Line Treatments for Anovulatory Infertility in PCOS Patients

NCT00558077Phase 4COMPLETED
Sponsor

University Magna Graecia

Enrollment

50

Started

2003

Primary outcome

Live-birth rate

Polycystic Ovary SyndromeInfertilityAnovulation

Cancer Chemoprevention by Metformin Hydrochloride Compared to Placebo in Oral Potentially Malignant Lesions

NCT03684707Phase 4UNKNOWN
Sponsor

Ain Shams University

Enrollment

30

Started

2018

Primary outcome

Evaluate lesion size in millimeters

Oral Cancer

Tolerance & Responsiveness Improvement for Metformin (TRIM)

NCT03670043Phase 4COMPLETED
Sponsor

West Side Institute for Science and Education

Enrollment

29

Started

2019

Primary outcome

Birmingham Irritable Bowel Syndrome (IBS) Symptom Questionnaire

Type2 Diabetes Mellitus

Metabolic Abnormalities in HIV-infected Persons

NCT01612858Phase 4COMPLETED
Sponsor

Tufts Medical Center

Enrollment

20

Started

2011

Primary outcome

Change in Insulin Sensitivity From Baseline to Week 12 Post-treatment With Insulin Sensitizing Agent

LipodystrophyHIV Infection

Metformin in Longevity Study (MILES).

NCT02432287Phase 4COMPLETED
Sponsor

Albert Einstein College of Medicine

Enrollment

16

Started

2014

Primary outcome

Increase in Number of Expressed Genes in Muscle and Adipose Tissue Using RNA Sequencing (RNA-Seq)

Aging

Metformin for the Treatment of Nonalcoholic Fatty Liver Disease (NAFLD)

NCT00736385Phase 4TERMINATED
Sponsor

Duke University

Enrollment

11

Started

2009

Primary outcome

Study Endpoints Will Include Measurements of Insulin Sensitivity, Hepatic Insulin Clearance, and Altered Parameters of Lipid Metabolism, Changes in the Histological Features That Define NAFLD, and Quantitative Measurements of Visceral and Peripheral Fat.

Fatty Liver

Ertugliflozin and Sitagliptin Co-administration Factorial Study (VERTIS FACTORAL, MK-8835-005)

NCT02099110Phase 3COMPLETED
Sponsor

Merck Sharp & Dohme LLC

Enrollment

1,233

Started

2014

Primary outcome

Change From Baseline in A1C at Week 26: Excluding Rescue Approach

Type 2 Diabetes Mellitus

Efficacy of Fixed Combination Therapy of Vildagliptin and Metformin Compared to the Individual Monotherapy Components in Drug Naive Patients With Type 2 Diabetes

NCT00382096Phase 3COMPLETED
Sponsor

Novartis Pharmaceuticals

Enrollment

1,179

Started

2006

Primary outcome

Change from baseline in HbA1c

Diabetes Mellitus, Type 2

Evaluate the Efficacy and Safety of Saxagliptin in Combination With Metformin IR Compared to Saxagliptin Monotherapy and to Metformin IR Monotherapy in Drug Naive Chinese Subjects With Type 2 Diabetes Who Have Inadequate Glycaemic Control

NCT02273050Phase 3COMPLETED
Sponsor

AstraZeneca

Enrollment

1,136

Started

2014

Primary outcome

Change From Baseline in HbA1c From Baseline to Week 24 Provided That it is Prior to Rescue

Type 2 Diabetes Mellitus

A Study in Participants With Type 2 Diabetes Mellitus

NCT01064687Phase 3COMPLETED
Sponsor

Eli Lilly and Company

Enrollment

978

Started

2010

Primary outcome

Change From Baseline to 26 Weeks Endpoint in Glycosylated Hemoglobin (HbA1c)

Diabetes Mellitus, Type 2

Study to Compare Sitagliptin Versus Sulfonylurea Treatment During Ramadan Fasting in Patients With Type 2 Diabetes (MK-0431-262)

NCT01340768Phase 3COMPLETED
Sponsor

Merck Sharp & Dohme LLC

Enrollment

870

Started

2010

Primary outcome

Percentage of Participants With at Least One Symptomatic Hypoglycemic Event

Type 2 Diabetes Mellitus

A Study Comparing the Effects and Safety of Dulaglutide With Insulin Glargine in Type 2 Diabetes Mellitus

NCT01648582Phase 3COMPLETED
Sponsor

Eli Lilly and Company

Enrollment

774

Started

2012

Primary outcome

Change From Baseline in Glycosylated Hemoglobin (HbA1c) at 26 Weeks

Type 2 Diabetes Mellitus

Chiglitazar Added to Metformin for Type 2 Diabetes

NCT04807348Phase 3COMPLETED
Sponsor

Chipscreen Biosciences, Ltd.

Enrollment

533

Started

2021

Primary outcome

percentage of HbA1c change from baseline

Type 2 Diabetes

A Phase III Study of SP2086 in Combination With Metformin in Patients With Type 2 Diabetes

NCT01970046Phase 3UNKNOWN
Sponsor

Jiangsu HengRui Medicine Co., Ltd.

Enrollment

360

Started

2013

Primary outcome

Change From Baseline in HbA1c (Hemoglobin A1C) at Week24

Type 2 Diabetes

PCOS Treatment Using DLBS3233, Metformin, and Combination of Both

NCT01999686Phase 3COMPLETED
Sponsor

Dexa Medica Group

Enrollment

186

Started

2014

Primary outcome

HOMA-IR reduction

Polycystic Ovary Syndrome (PCOS)Insulin Resistance

A Study Assessing Saxagliptin Treatment in Subjects With Type 2 Diabetes Who Are Not Controlled With Diet and Exercise

NCT00374907Phase 3COMPLETED
Sponsor

AstraZeneca

Enrollment

156

Started

2006

Primary outcome

Insulin Secretion Rate Area Under the Curve (AUC) During Intravenous (IV)-Oral Hyperglycemic Clamp - Percent Change From Baseline at Week 12

Type 2 Diabetes

Clinical Evaluation of the Effect of Metformin in Sepsis

NCT05979038Phase 3UNKNOWN
Sponsor

German University in Cairo

Enrollment

110

Started

2023

Primary outcome

28 days mortality

Sepsis

Effects of Empagliflozin + Linagliptin vs Metformin + Insulin Glargine on Renal and Vascular Changes in Type 2 Diabetes

NCT02752113Phase 3COMPLETED
Sponsor

Institut für Pharmakologie und Präventive Medizin

Enrollment

101

Started

2016

Primary outcome

Effect of empagliflozin plus linagliptin vs metformin plus insulin glargine on basal NO activity of renal vasculature (response of RPF (renal plasma flow) to L-NMMA (NG-monomethyl-L-arginine) infusion)

Diabetes Mellitus Type 2

Metformin in Obese Children and Adolescents

NCT01487993Phase 3COMPLETED
Sponsor

St. Antonius Hospital

Enrollment

62

Started

2011

Primary outcome

Change in BMI from baseline

ObesityInsulin Resistance

Cancer Chemoprevention by Metformin Hydrochloride in Oral Potentially Malignant Lesions

NCT03685409Phase 3UNKNOWN
Sponsor

Cairo University

Enrollment

62

Started

2018

Primary outcome

Clinical Outcomes

Oral Cancer

Treatment of Overweight Induced by Antipsychotic Medication in Young People With Autism Spectrum Disorders (ASD)

NCT01825798Phase 3COMPLETED
Sponsor

Holland Bloorview Kids Rehabilitation Hospital

Enrollment

60

Started

2013

Primary outcome

Change in Body Mass Index Z-score

OverweightAutism Spectrum Disorder

Saxagliptin + Metformin Compared to Saxagliptin or Metformin Monotherapy in PCOS Women With Impaired Glucose Homeostasis

NCT02022007Phase 3COMPLETED
Sponsor

Woman's

Enrollment

38

Started

2014

Primary outcome

Glucose Metabolism

Polycystic Ovary SyndromeDisorder of Glucose Regulation

Safety and Efficacy of Metformin for Treatment of Cytopenia in Children and Adolescents With Fanconi Anemia

NCT06519786Phase 3UNKNOWN
Sponsor

Ain Shams University

Enrollment

30

Started

2022

Primary outcome

Hematologic response (erythroid)

Fanconi Anemia

Metformin to Reduce Heart Failure After Myocardial Infarction

NCT01217307Phase 2/3COMPLETED
Sponsor

University Medical Center Groningen

Enrollment

380

Started

2011

Primary outcome

Improvement in Left Ventricular Ejection Fraction

ST Elevation Myocardial Infarction (STEMI)Coronary Artery DiseaseHeart FailureDiabetes

PRF+1% MF for Class II Mandibular Furcation Defects

NCT03207698Phase 2/3COMPLETED
Sponsor

Government Dental College and Research Institute, Bangalore

Enrollment

75

Started

2015

Primary outcome

Radiographic bone fill assessed in percentage

Furcation Defects

1% Metformin Gel in the Treatment of Class II Furcation Defects

NCT02580331Phase 2/3COMPLETED
Sponsor

Government Dental College and Research Institute, Bangalore

Enrollment

64

Started

2014

Primary outcome

Bone defect fill

Chronic Periodontitis

Fixed Dose Combination of Fluoxetin and Metformin in the Management of Overweight and Obesity

NCT03051451Phase 2SUSPENDED
Sponsor

Laboratorios Silanes S.A. de C.V.

Enrollment

150

Primary outcome

Decrease of at least 5% of body weight and the reduction in the body mass index.

Overweight and Obesity

Metformin for the Treatment of mCRC Patients Undergoing FOLFIRI Plus Target Therapy

NCT06826092Phase 2RECRUITING
Sponsor

Kaohsiung Medical University Chung-Ho Memorial Hospital

Enrollment

110

Started

2022

Primary outcome

Disease progression-free survival (PFS)

Progression-Free Survival

Metformin Hydrochloride in Preventing Esophageal Cancer in Patients With Barrett Esophagus

NCT01447927Phase 2COMPLETED
Sponsor

National Cancer Institute (NCI)

Enrollment

93

Started

2012

Primary outcome

Percent Change in Median pS6K1 Immunostaining Among Participants With Barrett Esophagus

Barrett EsophagusEsophageal Cancer

A Study Investigating Safety, Tolerability, Pharmacokinetics and Pharmacodynamics of GSK2330672 Administered With Metformin to Type 2 Diabetes Patients

NCT02202161Phase 2COMPLETED
Sponsor

GlaxoSmithKline

Enrollment

70

Started

2014

Primary outcome

Change From Baseline in Derived Plasma Glucose Parameter Over a 24-hour Period-fasting and Weighted Mean Glucose Area Under Curve (AUC[0-24 Hour])

Diabetes Mellitus, Type 2

Metformin in Safety and Efficacy in Gouty Patients

NCT06924658Phase 2RECRUITING
Sponsor

Mostafa Bahaa

Enrollment

70

Started

2025

Primary outcome

- Clinical assessment of disease activity

Gout

Effect of Metformin on Breast Cancer Metabolism

NCT01266486Phase 2COMPLETED
Sponsor

Oxford University Hospitals NHS Trust

Enrollment

41

Started

2011

Primary outcome

Measure Metformin Induced effects in phosphorylation of S6K, 4E-BP-1 and AMPK via immunohistochemical analysis

Breast Cancer

Metformin for People With CFRD on CFTR Modulator Therapy to Improve Ion Channel Function

NCT04530383Phase 2NOT_YET_RECRUITING
Sponsor

University of Kansas Medical Center

Enrollment

30

Started

2026

Primary outcome

Change in BK channel gene expression

Cystic Fibrosis-related DiabetesCystic Fibrosis

Metformin With Neoadjuvant Chemoradiation to Improve Pathologic Responses in Rectal Cancer

NCT03053544Phase 2COMPLETED
Sponsor

Sunnybrook Health Sciences Centre

Enrollment

15

Started

2016

Primary outcome

Pathological Complete Response (pCR) rate

Rectal Neoplasm Carcinoma in Situ Adenocarcinoma

A Study Comparing the Amount of Metformin and After Taking a Combination Tablet vs. Separate Tablets

NCT01055691Phase 1COMPLETED
Sponsor

AstraZeneca

Enrollment

120

Started

2010

Primary outcome

bioequivalence will be demonstrated if the 90% confidence interval (CI) for the formulation effect is contained within the interval of 0.8000-1.2500 for AUC(0-t), AUCinf and Cmax with respect to both dapagliflozin and metformin.

Healthy Volunteers

Clinical Investigation of Herbal Formulation and Its Efficacy in Polycystic Ovarian Syndrome

NCT07399535Phase 1COMPLETED
Sponsor

Jinnah Postgraduate Medical Centre

Enrollment

116

Started

2025

Primary outcome

Regulation of Menstrual Cycle

Polycystic Ovarian Syndrome (PCOS)Herbal MedicineInfertilityMetabolic Disorder

Comparison of PK After Administration of HCP1201 and Co-administration of Metformin SR 750mg and Rosuvastatin 20mg

NCT01929512Phase 1COMPLETED
Sponsor

Hanmi Pharmaceutical Company Limited

Enrollment

72

Started

2013

Primary outcome

metformin, rosuvastatin Cmax

Diabetes Mellitus

Bioequivalence Study of Metformin Hydrochloride Tablets 1000 mg Tablets of Dr. Reddy's Laboratories Limited Under Fasting Condition

NCT01160042Phase 1COMPLETED
Sponsor

Dr. Reddy's Laboratories Limited

Enrollment

54

Started

2005

Primary outcome

Bioequivalence on Cmax, AUC, Tmax,t1/2 parameters

Healthy

A Study to Evaluate the Pharmacokinetics and Safety Between "BR3006" and Co-administration of "BR3006A", "BR3006B", and "BR3006C" in Healthy Adult Volunteers (Fasting)

NCT07083388Phase 1RECRUITING
Sponsor

Boryung Pharmaceutical Co., Ltd

Enrollment

52

Started

2025

Primary outcome

Pharmacokinetic variable - Cmax

Diabetes Mellitus

Fasting BE Study of Metformin Hydrochloride ER Tablets 500 mg and Glucophage® XR Tablets 500 mg

NCT00650234Phase 1COMPLETED
Sponsor

Mylan Pharmaceuticals Inc

Enrollment

47

Started

2004

Primary outcome

Bioequivalence

Healthy

Voxelotor CYP and Transporter Cocktail Interaction Study

NCT05981365Phase 1COMPLETED
Sponsor

Pfizer

Enrollment

44

Started

2023

Primary outcome

Part A: Maximum Observed Plasma Concentration (Cmax) for Bupropion

Sickle Cell Disease

Effect of Genetic Variation in the Transporter OCT2, MATE1 and MATE2-K on the PKPD of Metformin

NCT01681680Phase 1COMPLETED
Sponsor

University of California, San Francisco

Enrollment

41

Started

2010

Primary outcome

Renal clearance of Metformin based on genotypes

Healthy

A Study to Evaluate the Pharmacokinetics and Safety Between "BR3006" and Co-administration of "BR3006A", "BR3006B", and "BR3006C" in Healthy Adult Volunteers (Fed)

NCT07083401Phase 1RECRUITING
Sponsor

Boryung Pharmaceutical Co., Ltd

Enrollment

40

Started

2025

Primary outcome

Pharmacokinetic variable - AUCt

Diabete Mellitus

Effect of BMS-986165 on the Blood Levels of Metformin

NCT04671953Phase 1COMPLETED
Sponsor

Bristol-Myers Squibb

Enrollment

36

Started

2020

Primary outcome

Maximum observed plasma concentration (Cmax) in plasma for metformin with and without BMS-986165

Healthy Participants

Sitagliptin and Metformin Hydrochloride Tablets 50 mg/500 mg Relative to Originator

NCT06233201Phase 1UNKNOWN
Sponsor

Bio-innova Co., Ltd

Enrollment

34

Started

2024

Primary outcome

Area under the plasma concentration-time curve from time zero to the last measurable concentration (AUC 0-t)

Healthy Subjects

Bioequivalence Study of of Metformin HCl From Gleptomet 50/1000 mg F.C.Tablets (EVA Pharma, Egypt) and Janumet 50/1000 mg F.C.Tablets (Merck Sharp & Dohme, The Netherlands)

NCT05798715Phase 1COMPLETED
Sponsor

Genuine Research Center, Egypt

Enrollment

30

Started

2022

Primary outcome

Cmax

Healthy

Influence of HRS9531 on Pharmacokinetics of Metformin in Healthy Subjects

NCT06654960Phase 1COMPLETED
Sponsor

Fujian Shengdi Pharmaceutical Co., Ltd.

Enrollment

20

Started

2024

Primary outcome

Area under the concentration versus time curve (AUC) of metformin from dosing time (0) to tau (dosing interval) (AUCtau) after 3.5 days.

Type 2 Diabetes

Bioequivalence Study to Compare Empagliflozin/Linagliptin/Metformin HCL 25mg/5mg/1000mg Extended-Release Tablets Versus Trijardy® XR Extended Release Film Coated Tablets

NCT07213895Phase 1COMPLETED
Sponsor

Humanis Saglık Anonim Sirketi

Enrollment

14

Started

2025

Primary outcome

For Empagliflozin & Linagliptin & Metformin; Maximum concentration obtained (Cmax)

Type 2 Diabetes Mellitus (T2DM)

Drug Interactions From Simultaneous Administration Of Metformin And GSK189075 To Subjects With Type 2 Diabetes

NCT00376038Phase 1COMPLETED
Sponsor

GlaxoSmithKline

Enrollment

13

Started

2006

Primary outcome

Blood concentrations of metformin when given with GSK189075 in T2DM subjects over 3-day course Lab tests, changes in blood pressure and heart rate and heart activity on EKG machine

Type 2 Diabetes MellitusDiabetes Mellitus, Type 2

Study of Erlotinib and Metformin in Triple Negative Breast Cancer

NCT01650506Phase 1COMPLETED
Sponsor

Columbia University

Enrollment

8

Started

2012

Primary outcome

The maximum tolerated dose of metformin in combination with a fixed dose of 150 mg erlotinib daily

Breast Cancer

Aerobic Versus Resistance Exercises on Insulin Sensitivity in Obese Patients

NCT06772857Early Phase 1ACTIVE_NOT_RECRUITING
Sponsor

Cairo University

Enrollment

3

Started

2024

Primary outcome

Change in Insulin Resistance Between Different Exercise Modes in Obese Patients

Insulin Sensitivity/Resistance

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