Time Variability of Pain Medication Adherence: An Observational Study (Preprint)

BACKGROUND Pain is difficult to manage in older adults. Pain management in older adults has been recommended to include both nonpharmacologic and pharmacologic strategies. Unfortunately, nonadherence to pain medication is more prevalent than any other chronic disease treatment. Technology-based reminders have some benefit for medication adherence but is biased because behavior has been verified by self-report. OBJECTIVE The purpose of this study was to describe objective medication adherence and latency of medication use in a subsample of older adults that used a voice assistant reminder to take scheduled pain medications. METHODS This observational feasibility study was conducted in the homes of community-dwelling older adults. Of the 15 older adults using voice assistant reminders for pain medications, we randomly selected a subsample of participants to use a medication event monitoring system to observe medication adherence. We collected demographics, self-reported health history, and pain medication name, dose, and dose frequency. Baseline data were collected on pain severity and interference using the Brief Pain Inventory-SF; concern and necessity beliefs about pain medications using the Beliefs About Medicines Questionnaire; self-confidence in managing pain with the PROMIS Self-Efficacy for Managing Symptoms and medication adherence with a Medication Event Monitoring System. RESULTS Participants used pain medications to alleviate pain severity ranging from moderate to severe. Each participant had varying beliefs about pain medicines and self-efficacy in managing pain symptoms. Overall latency was 55 minutes. The absolute latency (before or after reminder) varied among the participants; the shortest average time was 17 minutes and the longest was 4.5 hours. Our results found that 15% of the pain medications were taken within 5 minutes over 60% were taken within 30 minutes. CONCLUSIONS Voice assistant reminders may help cue patients to take medications, but the timing of use may vary. It may be helpful to monitor the absolute timing of scheduled medication use as a part of medication adherence behaviors in older adults especially when frequent dosing is prescribed. CLINICALTRIAL Adherence, Pain Medications, Older Adults, Reminders, mHealth, Voice Assistants