healthcare-cdss-patterns

Implement drug interaction checking as a pure function that takes the new drug, current medications, and allergy list, then returns severity-sorted alerts. Interaction pairs must be bidirectional, and cross-reactivity with documented allergies must produce critical alerts.

Validate doses against weight-based, age-adjusted, and renal-adjusted rules defined per drug and route. If a drug requires weight-based dosing and weight is missing, block the prescription rather than passing it, and return the suggested safe range.

NEWS2 (National Early Warning Score 2) is calculated from respiratory rate, oxygen saturation, supplemental oxygen, temperature, systolic blood pressure, heart rate, and consciousness level. Scoring tables must match the Royal College of Physicians specification exactly, producing a total score, risk level, and escalation guidance.

No, critical alerts must never be auto-dismissed or shown as toast notifications. They require a non-dismissable blocking modal, and clinicians must document an override reason that is stored in the audit trail before proceeding.

Avoid making safety checks optional, using any types for clinical data, hardcoding interaction pairs, silently catching engine errors, and skipping weight-based validation when weight is unavailable. CDSS failures must surface loudly, and missing data must block rather than pass.