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Polypharmacy Risk Score Calculator

Work out polypharmacy risk score instantly with clear inputs, formula shown and shareable results.

About Polypharmacy Risk Score Calculator

Applies the standard polypharmacy thresholds of five and ten regular medicines, and adds weighting for high-risk drugs and multiple prescribers.

Formula

Polypharmacy thresholds

5 to 9 regular medicines is polypharmacy and 10 or more is hyper-polypharmacy; the composite score adds 2 per high-risk medicine and 1 per additional prescriber

Worked example

With the default values below, Polypharmacy Risk Score Calculator returns Polypharmacy category of Polypharmacy (5 to 9 medicines). Change any input above and every figure here is recalculated in your browser.

Inputs used

Regular medicinesaccepts 0–40
9
High-risk medicinesaccepts 0–20
2
Different prescribers involvedaccepts 1–10
3

Results

Polypharmacy category
Polypharmacy (5 to 9 medicines)
Composite risk score
15
Risk band
Moderate risk
Review priority
Structured medication review recommended

Step by step

  1. 1Values used
  2. 2Polypharmacy thresholds
  3. 3Polypharmacy category= Polypharmacy (5 to 9 medicines)
  4. 4Composite risk score= 15
  5. 5Risk band= Moderate risk
  6. 6Review priority= Structured medication review recommended

Assumptions and limits

  • The result is derived only from the 3 inputs listed above. Anything not among them is not part of the calculation.
  • In particular, this calculator does not take inflation, tax, fees or charges or compounding frequency into account.
  • Figures are rounded for display to whole numbers, so totals built from several rounded parts can differ slightly from the unrounded arithmetic.
  • Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

How these calculators are built and tested is described on the Methodology page. If a figure looks wrong, please report it.

Educational estimate only. Not a substitute for professional clinical judgement, and must not be used to make treatment or dosing decisions.

Frequently Asked Questions

Is polypharmacy always inappropriate?

No. Many long-term conditions require several medicines; the concern is problematic polypharmacy without benefit.

What tools support review?

STOPP/START and the Beers criteria identify potentially inappropriate prescribing in older adults.

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