Price comparisons should be based on the usual daily dose (or other appropriate dose), the appropriate pack size and should include at least one comparator drug (standard therapy, if available, and/or the drug(s) which has been compared with the new drug in the clinical trials. The price comparison should also cover an appropriate period of time - for instance one month for drugs which are taken long term. Antibiotics can be compared on the basis of the usual lengths of a course of treatment. Comparisons on a price-per-day basis may be misleading.
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Case study: Dialogo sui Farmaci, Italy
When a new drug is launched that is a ‘me-too’ drug, the Italian bulletin Dialogo sui Farmaci compares the cost of the drug with other drugs in the same class, e.g. rosuvastatin versus other statins (see Figure 8.2). If instead, the new drug belongs to a new class (e.g. teriparatide for osteoporosis), the cost is compared with that of the drugs and doses used in the clinical trials of efficacy (see Figure 8.3). If the drug has been only tested against placebo, the reference drugs are those considered as first-line or standard therapy for such a condition.
Contributed by Maria Font, Dialogo sui Farmaci, Italy [http://www.dialogosuifarmaci.it].
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Source: Dialogo sui Farmaci, Italy.

Figure 8.2 Cost comparison among "me-too" drugs statins: 28 day treatment cost
Source: Dialogo sui Farmaci, Italy.

Figure 8.3 Cost comparison between new and standard drugs teriparatide and bisphosphonates: cost of 28 days' treatment
Source: Dialogo sui Farmaci, Italy.
Table 8.1 Approximate drug cost of 1 year's treatment in the UK*
Statin |
Licensed daily dosage |
Cost |
atorvastatin |
10 - 80 mg |
£246 - £613 |
cerivastatin** |
100 - 400 µg |
£169 - £226 |
fluvastatin |
20 - 80 mg |
£166 - £209 |
pravastatin |
10 - 40 mg |
£211 - £387 |
simvastatin |
10 - 80 mg |
£235 - £387 |
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* Costs calculated from Drug Tariff and Chemist & Druggist prices, where available. **Cerivastatin was withdrawn from the market worldwide in 2001
The drug costs of treatment for intermediate dosages of statins (e.g. atorvastatin or simvastatin) may be greater than for maximum dosages.
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Source: Statin therapy - what now? Drug and Therapeutics Bulletin 2001; 39:17-21.