World Health Organization definitions for ‘defined daily doses’
| Statin | DDD | ADQ | BNF stated doses for secondary prevention of heart disease | Cost of 28 days’ supply, £ | Mean number of DDDs for an average-sized practice, 2008/2009 | All statin usage, % |
|---|---|---|---|---|---|---|
| Atorvastatin | 20 mg | 20 mg | 10 mg | 24.64 | 65 219 | 52.3 |
| Fluvastatin | 60 mg | 40 mg | 80 mg | 7.83 | 741 | 0.6 |
| Pravastatin | 30 mg | 30 mg | 40 mg | 3.45 | 7567 | 6.0 |
| Rosuvastatin | 10 mg | 10 mg | 20 mg | 18.03 | 10 086 | 8.1 |
| Simvastatin | 30 mg | 30 mg | 20 mg | 1.72 | 41 194 | 33.0 |
| Simvastatin/ezetimibe combination all strengths | 1 tablet | No dose specified | No dose specified | 33.42–41.21 | 8614 |
ADQ = average daily quantity. BNF = British National Formulary.5 DDD = defined daily dose.