Ketotifen fumarate vs Promethazine hydrochloride
National NHS prescribing compared (Prescription Cost Analysis)
Promethazine hydrochloride was dispensed 131.8× as often as Ketotifen fumarate in May 2026 — 234,806 items versus 1,781 in England.
1,781items
Ketotifen fumarate · May 2026
NHSBSA Prescription Cost Analysis
234,806items
Promethazine hydrochloride · May 2026
NHSBSA Prescription Cost Analysis
Figure 1. Ketotifen fumarate versus Promethazine hydrochloride: national items dispensed by month
▬ Ketotifen fumarate · ╌ Promethazine hydrochloride
Source: NHSBSA Prescription Cost Analysis, to May 2026
| Measure | Ketotifen fumarate | Promethazine hydrochloride |
|---|---|---|
| Items, May 2026 | 1,781 | 234,806 |
| Items, last 12 months | 19,765 | 2,912,461 |
| Net ingredient cost, May 2026 | £46,736 | £437,542 |
See the full profile for Ketotifen fumarate or Promethazine hydrochloride.