High Blood Pressure, Substance Abuse
Conditions
Brief summary
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.
Interventions
OTHERUsual Care
Usual Care
BEHAVIORALContingency 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.
Sponsors
National Institute on Drug Abuse (NIDA)
UConn Health
Study design
Allocation
NON_RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
NONE
Eligibility
Sex/Gender
ALL
Age
18 Years to No maximum
Healthy volunteers
No
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
Exclusion criteria
* uncontrolled psychiatric disorders * significant cognitive impairment * non-English speaking
Design outcomes
Primary
| Measure | Time frame |
|---|---|
| self reports of medication adherence | month 3 |
Secondary
| Measure | Time frame |
|---|---|
| ambulatory (24-hour) blood pressure | month 3 |
Countries
United States
Outcome results
None listed