Use of Short Text Messages to Promote Medication Adherence in Hypertensive Patients

Status

Completed

Phases

Study type

Interventional

Source

ClinicalTrials.gov

Registry ID

NCT04124263

Enrollment

157

Registered

2019-10-11

Start date

2021-01-07

Completion date

2022-11-10

Last updated

2022-12-21

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

Conditions

Adherence, Treatment, Hypertension

Keywords

Hypertension, Primary Health Care

Brief summary

OBJECTIVE: To evaluate the effect of intervention by sending short text messages with a reminder of the time of medication use, compared to sending educational messages, on adherence to drug treatment in patients with hypertension. METHODOLOGY: Prospective, randomized, controlled, double-blind, parallel group study that will be performed in patients with hypertension seen at a community pharmacy in Brazil. The following groups will be compared: a) intervention group 1: 70 hypertensive patients registered for access to medication associated with usual care, in addition to text messages via mobile phone with educational information b) intervention group 2: 70 hypertensive patients registered for access to medications that will additionally receive text messages at the times indicated in the prescription for use of each indicated medication, in addition to educational information. After the washout period, the groups will have the active interventions changed for an additional 90 days. The proportion of adherent and non-adherent patients with and without controlled BP in both groups will be compared after the periods of application of the different interventions.

Interventions

OTHEREducational short message texts

Educational messages for patient engagement

OTHERAdherence short message texts

Reminder messages of medication use time

Study design

Allocation

RANDOMIZED

Intervention model

CROSSOVER

Primary purpose

HEALTH_SERVICES_RESEARCH

Masking

DOUBLE (Subject, Caregiver)

Eligibility

Sex/Gender

ALL

Age

18 Years to 90 Years

Healthy volunteers

Inclusion criteria

hypertension diagnosis, age, availability of mobile phone with short message texts access and ability to read and access short message texts -

Exclusion criteria

visual, hearing or mental disabilities that disables receiving short message texts , being pregnant, recently delivered or breastfeeding \-

Design outcomes

Primary

Measure	Time frame	Description
Treatment adherence	Seven months (including one month of washout period)	Measurement of medication usage through Brief Medication Questionnaire: low to high adherence

Secondary

Measure	Time frame	Description
Blood pressure	Seven months (including one month of washout period)	Measurement of blood pressure

Countries

Brazil

Outcome results

None listed

Source: ClinicalTrials.gov · Data processed: Feb 4, 2026