Olanzapine vs Chlorpromazine hydrochloride
National NHS prescribing compared (Prescription Cost Analysis)
Olanzapine was dispensed 17.6× as often as Chlorpromazine hydrochloride in May 2026 — 217,708 items versus 12,392 in England.
217,708items
Olanzapine · May 2026
NHSBSA Prescription Cost Analysis
12,392items
Chlorpromazine hydrochloride · May 2026
NHSBSA Prescription Cost Analysis
Figure 1. Olanzapine versus Chlorpromazine hydrochloride: national items dispensed by month
▬ Olanzapine · ╌ Chlorpromazine hydrochloride
Source: NHSBSA Prescription Cost Analysis, to May 2026
| Measure | Olanzapine | Chlorpromazine hydrochloride |
|---|---|---|
| Items, May 2026 | 217,708 | 12,392 |
| Items, last 12 months | 2,693,982 | 162,181 |
| Net ingredient cost, May 2026 | £440,809 | £424,812 |
See the full profile for Olanzapine or Chlorpromazine hydrochloride.