Promethazine hydrochloride vs House dust mites allergen extract
National NHS prescribing compared (Prescription Cost Analysis)
Promethazine hydrochloride was dispensed 1,969.6× as often as House dust mites allergen extract in April 2026 — 246,200 items versus 125 in England.
246,200items
Promethazine hydrochloride · April 2026
NHSBSA Prescription Cost Analysis
125items
House dust mites allergen extract · April 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 April 2026
| Measure | Promethazine hydrochloride | House dust mites allergen extract |
|---|---|---|
| Items, April 2026 | 246,200 | 125 |
| Items, last 12 months | 2,913,211 | 1,115 |
| Net ingredient cost, April 2026 | £472,333 | £15,055 |
See the full profile for Promethazine hydrochloride or House dust mites allergen extract.