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Effect of serotonin transporter gene polymorphisms location 5-HTTLPR and rs25531 on Gastrointestinal intolerance to metformin in Thai diabetic patient

Effect of serotonin transporter gene polymorphisms location 5-HTTLPR and rs25531 on Gastrointestinal intolerance to metformin in Thai diabetic patient

Status
Active, not recruiting
Phases
Unknown
Study type
Observational
Source
TCTR
Registry ID
TCTR20220718001
Enrollment
94
Registered
2022-07-18
Start date
2022-04-12
Completion date
Unknown
Last updated
2026-08-03

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Diabetes mellitus type 2 who was treated with Metformin or used to be treated with metformin Metformin intolerance, gastrointestinal intolerance, serotonin transporter gene, SERT

Interventions

1. patients who was treated with any dosage of metformin then stopped using the medication due to gastrointestinal symptoms within 6 months after the starting date ,1. patients who was treated with
Treatment,Treatment

Sponsors

Department of medicine, Chulalongkorn University
Lead Sponsor

Eligibility

Sex/Gender
All
Age
18 Years to 100 Years

Inclusion criteria

Inclusion criteria: 1. patient with diabetes mellitus type 2 2. treated or used to be treated with Metformin (immediate release) 3. Thai patients, aged > 18 years old

Exclusion criteria

Exclusion criteria: 1. patients who withdraw metformin due to other reasons which was not gastrointestinal side effect 2. patients with irritable bowel syndrome 3. patients with inflammatory bowel disease 4. patients with cirrhosis child B or C 5. patients with advanced stage of cancer 6. patient with AIDS 7. pregnant patients

Design outcomes

Primary

MeasureTime frame
Serotonin transporter gene genotype At the beginning of study blood for Genetic analysis by Sanger sequencing technique

Secondary

MeasureTime frame
baseline characteristics At the beginning of study data from medical record and interview : age, sex, BMI, comorbidity, medication history, detail of metformin used, lab investigation Ex. FBS, HbA1C, lipid profile, Creatinine

Countries

Thailand

Contacts

Public ContactSutharin Suteetorn

King Chulalongkorn Memorial Hospital

tkkyori@gmail.com022564000

Outcome results

None listed

Source: TCTR (via WHO ICTRP) · Data processed: Aug 9, 2026