Improving Antihypertensive Medication Adherence

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

COMPLETED

Clinical Phase

NA

Total Enrollment

30 participants

Study Classification

INTERVENTIONAL

Study Start Date

2011-02-28

Study Completion Date

2012-07-31

Brief Summary

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Poor adherence to antihypertensive medications is associated with morbidity, and data suggest that substance abuse may contribute to poor adherence. Contingency management (CM), an intervention highly efficacious for improving outcomes of substance abusers, shows promise in improving medication adherence in a handful of small trials. CM involves providing tangible reinforcement each time the behavior (medication ingestion) is exhibited. Thus far, studies evaluating CM for increasing medication adherence have utilized MEMS caps, but reinforcement of adherence via MEMS caps is done relatively infrequently and with delay, hindering its efficacy. A widely utilized technology that may be more appropriate for reinforcing medication adherence is cell phones, which can record the process of pill ingestion through video functions. As regular monitoring and feedback is important in the efficacy of CM, patients can be provided with daily messages regarding adherence and CM earnings. In this pilot study, we propose to randomize 40 hypertensive substance abusing patients with suboptimal adherence to antihypertensive medications to one of two 12-week treatment conditions: (1) usual care, or (2) usual care with cell phone monitoring and CM. In the CM condition, patients will carry a cell phone and record and send in time- and date-stamped self videos of medication ingestion. These patients will receive congratulatory messages or reminders about adherence, and they will earn vouchers each time medication ingestion occurs at the appropriate time, along with bonuses for sustained adherence. We hypothesize that the CM condition will improve self report and pill count measurements of medication adherence and that it will result in decreased blood pressure. Results from this study may have widespread implications for the use of cell phones as a novel technology to improve medication adherence.

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Detailed Description

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Conditions

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High Blood Pressure Substance Abuse

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Usual Care

Group Type ACTIVE_COMPARATOR

Usual Care

Intervention Type OTHER

Usual Care

usual care with cell phone monitoring and CM

In the CM condition, patients will carry a cell phone and record and send in time- and date-stamped self videos of medication ingestion.

Group Type EXPERIMENTAL

Contingency Management

Intervention Type BEHAVIORAL

This intervention consists of congratulatory messages or reminders about adherence, and participants will earn vouchers each time medication ingestion occurs at the appropriate time, along with bonuses for sustained adherence.

Interventions

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Usual Care

Intervention Type OTHER

Contingency Management

This intervention consists of congratulatory messages or reminders about adherence, and participants will earn vouchers each time medication ingestion occurs at the appropriate time, along with bonuses for sustained adherence.

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* age \>18 years
* have been prescribed one or more antihypertensive medications
* blood pressure of \>120 mmHg systolic or \>80 mmHg diastolic
* substance use problem
* willing to use a cell phone to record medication ingestion for three months
* have a valid photo ID (driver's license, passport, state ID) and are willing to sign an off-campus property transfer form and return study equipment at the end of study participation