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Independent analysis of NHS open data
PharmaInsight

Isocarboxazid vs Mirtazapine

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

Mirtazapine was dispensed 10,936.7× as often as Isocarboxazid in May 2026 — 1,137,415 items versus 104 in England.

104items

Isocarboxazid · May 2026

NHSBSA Prescription Cost Analysis

1,137,415items

Mirtazapine · May 2026

NHSBSA Prescription Cost Analysis

Figure 1. Isocarboxazid versus Mirtazapine: national items dispensed by month

▬ Isocarboxazid   ·   ╌ Mirtazapine

0 609k 1.2m Jan 2021 Nov 2021 Sep 2022 Jul 2023 May 2024 Mar 2025 May 2026 Mirtazapine 104 Jan 2021: 132 Feb 2021: 144 Mar 2021: 134 Apr 2021: 149 May 2021: 129 Jun 2021: 137 Jul 2021: 147 Aug 2021: 127 Sep 2021: 120 Oct 2021: 120 Nov 2021: 123 Dec 2021: 145 Jan 2022: 127 Feb 2022: 129 Mar 2022: 130 Apr 2022: 129 May 2022: 139 Jun 2022: 124 Jul 2022: 97 Aug 2022: 120 Sep 2022: 106 Oct 2022: 111 Nov 2022: 109 Dec 2022: 122 Jan 2023: 109 Feb 2023: 96 Mar 2023: 114 Apr 2023: 116 May 2023: 146 Jun 2023: 126 Jul 2023: 126 Aug 2023: 113 Sep 2023: 120 Oct 2023: 117 Nov 2023: 123 Dec 2023: 113 Jan 2024: 135 Feb 2024: 126 Mar 2024: 112 Apr 2024: 117 May 2024: 119 Jun 2024: 90 Jul 2024: 149 Aug 2024: 114 Sep 2024: 117 Oct 2024: 120 Nov 2024: 117 Dec 2024: 113 Jan 2025: 133 Feb 2025: 108 Mar 2025: 117 Apr 2025: 99 May 2025: 133 Jun 2025: 108 Jul 2025: 113 Aug 2025: 115 Sep 2025: 114 Oct 2025: 106 Nov 2025: 84 Dec 2025: 111 Jan 2026: 95 Feb 2026: 79 Mar 2026: 97 Apr 2026: 94 May 2026: 104

Source: NHSBSA Prescription Cost Analysis, to May 2026

Isocarboxazid versus Mirtazapine, May 2026
Measure Isocarboxazid Mirtazapine
Items, May 2026 104 1,137,415
Items, last 12 months 1,220 13,842,931
Net ingredient cost, May 2026 £41,738 £1,218,242

See the full profile for Isocarboxazid or Mirtazapine.