Olanzapine vs Chlorpromazine hydrochloride
National NHS prescribing compared (Prescription Cost Analysis)
Olanzapine was dispensed 17.1× as often as Chlorpromazine hydrochloride in March 2026 — 227,743 items versus 13,327 in England.
227,743items
Olanzapine · March 2026
NHSBSA Prescription Cost Analysis
13,327items
Chlorpromazine hydrochloride · March 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 March 2026
| Measure | Olanzapine | Chlorpromazine hydrochloride |
|---|---|---|
| Items, March 2026 | 227,743 | 13,327 |
| Items, last 12 months | 2,701,116 | 164,802 |
| Net ingredient cost, March 2026 | £371,369 | £361,705 |
See the full profile for Olanzapine or Chlorpromazine hydrochloride.