Skip to content

Comparison of effects of combined angiotensin converting enzyme inhibitor and low dose thiazide diuretic on insulin action in patients with hypertension and type two diabetes: a double-blind crossover study

Status
Active, not recruiting
Phases
Unknown
Study type
Interventional
Source
ISRCTN
Registry ID
ISRCTN41655008
Enrollment
15
Registered
2007-02-06
Start date
2001-08-01
Completion date
Unknown
Last updated
2015-01-13

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

Conditions

Type two diabetes and essential hypertension Nutritional, Metabolic, Endocrine Diabetes

Interventions

Patients were commenced on captopril 50 mg twice daily and this continued throughout the trial. Patients were randomly assigned to either bendroflumethiazide 1.25 mg once daily or placebo for twelve w

Sponsors

Royal Victoria Hospital (UK)
Lead Sponsor

Eligibility

Inclusion criteria

Inclusion criteria: 1. Aged 40 to 65 years 2. Hypertension (either newly diagnosed or controlled on treatment) 3. Type two diabetes established on dietary treatment with or without oral hypoglycaemic agents 4. Fasting plasma glucose in the range 7 - 12 mmol/l

Exclusion criteria

Exclusion criteria: 1. Secondary hypertension 2. Hepatic or renal disease or were taking Non-Steroidal Anti-Inflammatory Drugs (NSAIDs) or steroids which may affect insulin action

Design outcomes

Primary

MeasureTime frame
When compared to captopril alone, treatment with low dose bendroflumethiaizide (1.25 mg) in combination with captopril produced a 23% reduction in glucose infusion rates required to maintain isoglycaemia and there was a comparable reduction in isotopically induced decline in peripheral insulin sensitivity most probably in skeletal muscle. The combination of low-dose bendroflumethiazide 1.25 mg and captopril resulted in a significant reduction in blood pressure (6/3 mmHg) compared to captopril alone.

Secondary

MeasureTime frame
Serum potassium was significantly lower after treatment with captopril and bendroflumethiaizide as compared to treatment with captopril alone.

Countries

United Kingdom

Outcome results

None listed

Source: ISRCTN (via WHO ICTRP) · Data processed: Feb 4, 2026