Obesity

Efficacy of phentermine/topiramate extended release in weight management and metabolic profiles: A multicentre study in South Korea

Diabetes Obes MetabPublished Retrospective cohort study

Authors' conclusion

The study suggests phentermine/topiramate ER is an effective option for obesity management in a South Korean population, though long-term adherence remains a challenge.

Study context

Population
People with obesity initiating phentermine/topiramate extended release (ER), January 2020–April 2023, 10 tertiary hospitals in South Korea540 men · 1,299 women
Participants
1,839 people
Outcome
Body weight change
Follow-up
5-6 months
Methodological detailsmulticentre, 10 tertiary hospitals, routine clinical practice
  • Multicentre
  • 10 tertiary hospitals
  • Routine clinical practice

Main finding

As reported in the abstract

Weight reduction
Mean weight reduction
7.9%
Weight loss in men
7.1%
Weight loss in women
8.2%
Achieved >5% weight loss
Over 56%
Exceeded 10% reduction
23%
Continuation rate at 5-6 months
48%

Observational data: associations, not effects.

Further findings

Predictors of weight loss

Younger participants, women and those with moderate to severe obesity had more pronounced weight loss vs older men and mild obesity, respectively

Metabolic parameters · 5-6 months

HbA1c decrease (%)
0.4 ± 0.9%; p < 0.001
LDL-C decrease (mg/dL)
10 ± 32 mg/dL; p < 0.001
Systolic blood pressure decrease (mmHg)
6 ± 15 mmHg; p < 0.001

Weight loss in those persisting in treatment · 12 months

Persisted in treatment
21%
Average weight loss
9.6%
Surpassed 5% weight loss
65%

Safety

Mild adverse events (e.g. paresthesia, dry mouth, insomnia)
15%
Treatment was well-tolerated

Original publication

Efficacy of phentermine/topiramate extended release in weight management and metabolic profiles: A multicentre study in South Korea. Diabetes Obes Metab. Published 17 March 2025. doi:10.1111/dom.16342

Composed by AI from the published abstract and checked against it. How Briefs are made →

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