Glycerol phenylbutyrate vs Mercaptamine
National NHS prescribing compared (Prescription Cost Analysis)
Mercaptamine was dispensed 8.0× as often as Glycerol phenylbutyrate in January 2026 — 8 items versus 1 in England.
1items
Glycerol phenylbutyrate · January 2026
NHSBSA Prescription Cost Analysis
8items
Mercaptamine · January 2026
NHSBSA Prescription Cost Analysis
Figure 1. Glycerol phenylbutyrate versus Mercaptamine: national items dispensed by month
▬ Glycerol phenylbutyrate · ╌ Mercaptamine
Source: NHSBSA Prescription Cost Analysis, to January 2026
| Measure | Glycerol phenylbutyrate | Mercaptamine |
|---|---|---|
| Items, January 2026 | 1 | 8 |
| Items, last 12 months | 21 | 102 |
| Net ingredient cost, January 2026 | £1,932 | £1,536 |
See the full profile for Glycerol phenylbutyrate or Mercaptamine.