Mercaptamine vs Sodium phenylbutyrate
National NHS prescribing compared (Prescription Cost Analysis)
Mercaptamine was dispensed 8.0× as often as Sodium phenylbutyrate in March 2026 — 8 items versus 1 in England.
8items
Mercaptamine · March 2026
NHSBSA Prescription Cost Analysis
1items
Sodium phenylbutyrate · March 2026
NHSBSA Prescription Cost Analysis
Figure 1. Mercaptamine versus Sodium phenylbutyrate: national items dispensed by month
▬ Mercaptamine · ╌ Sodium phenylbutyrate
Source: NHSBSA Prescription Cost Analysis, to March 2026
| Measure | Mercaptamine | Sodium phenylbutyrate |
|---|---|---|
| Items, March 2026 | 8 | 1 |
| Items, last 12 months | 102 | 42 |
| Net ingredient cost, March 2026 | £1,536 | £493 |
See the full profile for Mercaptamine or Sodium phenylbutyrate.