Promethazine hydrochloride vs House dust mites allergen extract
National NHS prescribing compared (Prescription Cost Analysis)
Promethazine hydrochloride was dispensed 1,608.3× as often as House dust mites allergen extract in May 2026 — 234,806 items versus 146 in England.
234,806items
Promethazine hydrochloride · May 2026
NHSBSA Prescription Cost Analysis
146items
House dust mites allergen extract · May 2026
NHSBSA Prescription Cost Analysis
Figure 1. Promethazine hydrochloride versus House dust mites allergen extract: national items dispensed by month
▬ Promethazine hydrochloride · ╌ House dust mites allergen extract
Source: NHSBSA Prescription Cost Analysis, to May 2026
| Measure | Promethazine hydrochloride | House dust mites allergen extract |
|---|---|---|
| Items, May 2026 | 234,806 | 146 |
| Items, last 12 months | 2,912,461 | 1,186 |
| Net ingredient cost, May 2026 | £437,542 | £18,420 |
See the full profile for Promethazine hydrochloride or House dust mites allergen extract.