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Independent analysis of NHS open data
PharmaInsight

Sodium valproate vs Clonazepam

National NHS prescribing compared (Prescription Cost Analysis)
Data updated May 2026

Sodium valproate was dispensed 23,299.1× as often as Clonazepam in May 2026 — 163,094 items versus 7 in England.

163,094items

Sodium valproate · May 2026

NHSBSA Prescription Cost Analysis

7items

Clonazepam · May 2026

NHSBSA Prescription Cost Analysis

Figure 1. Sodium valproate versus Clonazepam: national items dispensed by month

▬ Sodium valproate   ·   ╌ Clonazepam

0 103k 206k Jan 2021 Nov 2021 Sep 2022 Aug 2023 Jun 2024 Apr 2025 May 2026 Clonazepam 163,094 Jan 2021: 197k Feb 2021: 186k Mar 2021: 206k Apr 2021: 200k May 2021: 190k Jun 2021: 202k Jul 2021: 202k Aug 2021: 193k Sep 2021: 199k Oct 2021: 193k Nov 2021: 198k Dec 2021: 205k Jan 2022: 195k Feb 2022: 184k Mar 2022: 203k Apr 2022: 192k May 2022: 200k Jun 2022: 195k Jul 2022: 193k Aug 2022: 198k Sep 2022: 194k Oct 2022: 195k Dec 2022: 199k Jan 2023: 197k Feb 2023: 181k Mar 2023: 204k Apr 2023: 184k May 2023: 195k Jun 2023: 198k Jul 2023: 193k Aug 2023: 195k Sep 2023: 190k Oct 2023: 191k Nov 2023: 193k Dec 2023: 190k Jan 2024: 194k Feb 2024: 182k Mar 2024: 182k Apr 2024: 187k May 2024: 190k Jun 2024: 178k Jul 2024: 192k Aug 2024: 185k Sep 2024: 178k Oct 2024: 186k Nov 2024: 179k Dec 2024: 183k Jan 2025: 185k Feb 2025: 164k Mar 2025: 173k Apr 2025: 173k May 2025: 179k Jun 2025: 173k Jul 2025: 183k Aug 2025: 167k Sep 2025: 176k Oct 2025: 179k Nov 2025: 165k Dec 2025: 182k Jan 2026: 172k Feb 2026: 159k Mar 2026: 171k Apr 2026: 169k May 2026: 163k

Source: NHSBSA Prescription Cost Analysis, to May 2026

Sodium valproate versus Clonazepam, May 2026
Measure Sodium valproate Clonazepam
Items, May 2026 163,094 7
Items, last 12 months 2,058,845 64
Net ingredient cost, May 2026 £2,585,679 £4,009

See the full profile for Sodium valproate or Clonazepam.