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Health Behaviour and Medication Adherence: Michie’s COM-B Model and Habit Stacking

Examine the behavioral science of medication adherence and lifestyle modification. Discover Susan Michie's COM-B framework and Gollwitzer's implementation intentions.

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By Kriyasya Companion 2 min read Updated October 23, 2026

Health behaviour change and medication adherence represent the ultimate translational bridge between medical diagnostics and actual clinical recovery. The World Health Organization (WHO) estimates that approximately 50% of patients with chronic illnesses fail to take their medications as prescribed, resulting in avoidable morbidity, emergency hospitalizations, and billions in preventable healthcare expenditures. Pioneered by Susan Michie in the COM-B Model of Behaviour Change (Capability, Opportunity, Motivation → Behaviour) and the Behaviour Change Wheel (BCW), non-adherence is rarely deliberate defiance; it is categorized into Unintentional Non-Adherence (forgetfulness, complex polypharmacy regimens, cognitive barriers) and Intentional Non-Adherence (beliefs about medication necessity vs. fears of toxicity/dependence). The Health Behaviour and Medication Adherence Psychoeducation Module provides 21 structured video lessons on Michie’s COM-B architecture, motivational interviewing, and habit anchoring.

Susan Michie’s COM-B Behaviour Change System

  • Capability (Psychological & Physical): Having the cognitive working memory, literacy, and motor skills to understand prescriptions and organize pill regimens.
  • Opportunity (Physical & Social): Financial access to medications, transportation to pharmacies, and supportive family/social environments.
  • Motivation (Reflective & Automatic):
    • Reflective: The Horne Necessity-Concerns Framework (weighing personal belief in the medicine’s necessity against fear of adverse long-term side effects).
    • Automatic: Instincts, emotional avoidance, and conditioned daily habit loops.

Implementation Science: Habit Stacking

Interventions transform abstract medical intentions into concrete behavioral automation using Habit Stacking (Implementation Intentions by Peter Gollwitzer): anchoring medication ingestion to an established, automatic daily behavior (e.g., “Immediately after placing my coffee cup in the sink, I will take my morning blood pressure tablet”).

Editorial & Educational Disclaimer

Content published on Kriyasya Pulse represents editorial and educational insights uniting traditional wisdom with contemporary research. Readers are encouraged to apply discernment and seek qualified guidance where appropriate.

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Examine the behavioral science of medication adherence and lifestyle modification. Discover Susan Michie's COM-B framework and Gollwitzer's implementation intentions.

Health Behaviour and Medication Adherence: Michie’s COM-B Model and Habit Stacking

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