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Independent analysis of NHS open data
PharmaInsight

Paroxetine hydrochloride vs Mirtazapine

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

Mirtazapine was dispensed 11.5× as often as Paroxetine hydrochloride in May 2026 — 1,137,415 items versus 99,321 in England.

99,321items

Paroxetine hydrochloride · May 2026

NHSBSA Prescription Cost Analysis

1,137,415items

Mirtazapine · May 2026

NHSBSA Prescription Cost Analysis

Figure 1. Paroxetine hydrochloride versus Mirtazapine: national items dispensed by month

▬ Paroxetine hydrochloride   ·   ╌ Mirtazapine

0 609k 1.2m Jan 2021 Nov 2021 Sep 2022 Jul 2023 May 2024 Mar 2025 May 2026 Mirtazapine 99,321 Jan 2021: 107k Feb 2021: 100k Mar 2021: 112k Apr 2021: 108k May 2021: 103k Jun 2021: 110k Jul 2021: 109k Aug 2021: 105k Sep 2021: 109k Oct 2021: 104k Nov 2021: 108k Dec 2021: 113k Jan 2022: 106k Feb 2022: 99k Mar 2022: 111k Apr 2022: 105k May 2022: 108k Jun 2022: 105k Jul 2022: 104k Aug 2022: 107k Sep 2022: 107k Oct 2022: 106k Nov 2022: 107k Dec 2022: 108k Jan 2023: 106k Feb 2023: 98k Mar 2023: 112k Apr 2023: 100k May 2023: 106k Jun 2023: 108k Jul 2023: 105k Aug 2023: 107k Sep 2023: 105k Oct 2023: 106k Nov 2023: 107k Dec 2023: 106k Jan 2024: 108k Feb 2024: 102k Mar 2024: 103k Apr 2024: 107k May 2024: 109k Jun 2024: 102k Jul 2024: 110k Aug 2024: 106k Sep 2024: 104k Oct 2024: 109k Nov 2024: 104k Dec 2024: 107k Jan 2025: 109k Feb 2025: 97k Mar 2025: 103k Apr 2025: 103k May 2025: 106k Jun 2025: 103k Jul 2025: 109k Aug 2025: 100k Sep 2025: 106k Oct 2025: 108k Nov 2025: 98k Dec 2025: 109k Jan 2026: 105k Feb 2026: 95k Mar 2026: 104k Apr 2026: 102k May 2026: 99k

Source: NHSBSA Prescription Cost Analysis, to May 2026

Paroxetine hydrochloride versus Mirtazapine, May 2026
Measure Paroxetine hydrochloride Mirtazapine
Items, May 2026 99,321 1,137,415
Items, last 12 months 1,238,363 13,842,931
Net ingredient cost, May 2026 £159,996 £1,218,242

See the full profile for Paroxetine hydrochloride or Mirtazapine.