Sapropterin vs Mercaptamine
National NHS prescribing compared (Prescription Cost Analysis)
Mercaptamine was dispensed 6.0× as often as Sapropterin in October 2025 — 6 items versus 1 in England.
1items
Sapropterin · October 2025
NHSBSA Prescription Cost Analysis
6items
Mercaptamine · October 2025
NHSBSA Prescription Cost Analysis
Figure 1. Sapropterin versus Mercaptamine: national items dispensed by month
▬ Sapropterin · ╌ Mercaptamine
Source: NHSBSA Prescription Cost Analysis, to October 2025
| Measure | Sapropterin | Mercaptamine |
|---|---|---|
| Items, October 2025 | 1 | 6 |
| Items, last 12 months | 6 | 100 |
| Net ingredient cost, October 2025 | £538 | £990 |
See the full profile for Sapropterin or Mercaptamine.