Blood pressure drug response varies by ethnicity, study finds
NCT ID NCT02847338
First seen Jun 26, 2026 · Last updated Jun 26, 2026
Summary
This study tested how well different blood pressure drugs work in White, Black, and South Asian people. About 940 adults with high blood pressure took one or two common medicines. The goal was to see if response differs by ethnicity, which could help doctors personalize treatment.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- amlodipine, lisinopril, amiloride, chlortalidone
- What this could lead to
- If successful, this could help doctors choose the most effective blood pressure medication based on a person's ethnic background, leading to better control and fewer side effects.
- What could go wrong
- This is a completed Phase 4 study, so results are available, but it only looked at specific ethnic groups and may not apply to everyone. The findings may not change current treatment guidelines immediately.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
-
Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
-
940 people
The number who actually took part.
- Start date
-
Nov 2016
- Finished
-
Oct 2023
- Lead sponsor
-
Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
-
18 to 65 years
- Sex
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Anyone
- Healthy volunteers
-
Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: To be included in the trial the participant must: 1. Have given written informed consent to participate 2. Be aged 18 to 65 years inclusive 3. Self-Define Ethnicity: participants should SELF IDENTIFY into 1 of the three groups below: White White British White Irish Any other white background Black or Black British Black Caribbean Black African Any other black background Asian or Asian British Asian Indian Asian Pakistani Asian Bangladeshi Any other Asian background 4. Be hypertensive defined as:- Mono-therapy rotation 1. currently untreated with EITHER an ABPM day time average blood pressure ≥ 135mmHG (systolic) or ≥ 85mmHg (diastolic) OR Home BP measurements using a validated device based on the average of 10 blood pressure readings of ≥135 mmHg (systolic) or ≥85 mmHg (diastolic) 2. Patients who may be taking antihypertensive drugs at sub therapeutic doses or in ineffective combinations, and who are felt likely to be controllable on a study drug and willing and able to be washed out, at the discretion of the CI (Chief Investigator) / PI (Principal Investigator), can enter the trial if they meet the above criteria. Dual therapy rotation a.Treated hypertensive receiving one to three antihypertensive drugs with a blood pressure (ABPM daytime average blood pressure or Home BP as in a.) between 135 or 200 mmHg (systolic) AND between 85 or 110 mmHg (diastolic). Exclusion Criteria: The presence of any of the following will mean participants are ineligible: * Participant does not fit into one of the defined ethnic groups e.g. Mixed * Pregnant or breastfeeding women * Known or suspected secondary hypertension * Significant sensitivity or contraindications to any of the study medications * Participants taking lithium or are regularly consuming non-steroidal anti-inflammatory drugs at variable doses * Requirement to take any of the study drugs continuously e.g. ACEi and heart failure * Any clinically significant hepatic impairment * Any clinically significant kidney impairment * Concurrent participation in another clinical trial using systemic vasoactive medications or medications known to interact with the study drugs (participation in another study as part of the AIM HY mechanistic or social science programme will not be an exclusion criterion) * Patients who are deemed unsuitable by the investigator on clinical grounds
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
Contacts and locations
Locations
-
Cambridge University Hospitals NHS Foundation Trust
Cambridge, Cambridgeshire, CB2 0QQ, United Kingdom
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Hammersmith & Fulham GP Partnership: Richford Gate Medical Practice
London, W6 7HL, United Kingdom
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Heartlands Hospital
Birmingham, B9 5SS, United Kingdom
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Lister Hospital
Stevenage, SG1 4AB, United Kingdom
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Liverpool Heart and Chest Hospital
Liverpool, L14 3PE, United Kingdom
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Manchester Royal Infirmary
Manchester, M13 9WL, United Kingdom
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Nottingham University Hospital: QMC Campus
Nottingham, NG7 2UH, United Kingdom
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Queen Elizabeth Hospital
Birmingham, B15 2TH, United Kingdom
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Sandwell & West Birmingham Hospitals NHS Trust
Birmingham, B18 7QH, United Kingdom
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St George's Hospital
London, SW17 0RE, United Kingdom
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St Thomas' Hospital
London, SE1 7EH, United Kingdom
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University Hospital Llandough
Cardiff, CF64 2XX, United Kingdom
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University of Glasgow
Glasgow, G12 8TA, United Kingdom
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William Harvey Research Institute, Barts and the London Medical School
London, EC1M 6BQ, United Kingdom
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