Ketotifen fumarate vs Promethazine hydrochloride
National NHS prescribing compared (Prescription Cost Analysis)
Promethazine hydrochloride was dispensed 149.0× as often as Ketotifen fumarate in March 2026 — 252,174 items versus 1,693 in England.
1,693items
Ketotifen fumarate · March 2026
NHSBSA Prescription Cost Analysis
252,174items
Promethazine hydrochloride · March 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 March 2026
| Measure | Ketotifen fumarate | Promethazine hydrochloride |
|---|---|---|
| Items, March 2026 | 1,693 | 252,174 |
| Items, last 12 months | 18,775 | 2,895,697 |
| Net ingredient cost, March 2026 | £44,001 | £466,476 |
See the full profile for Ketotifen fumarate or Promethazine hydrochloride.