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Independent analysis of NHS open data
PharmaInsight

Senna vs Magnesium hydroxide

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

Senna was dispensed 97,485.5× as often as Magnesium hydroxide in May 2026 — 389,942 items versus 4 in England.

389,942items

Senna · May 2026

NHSBSA Prescription Cost Analysis

4items

Magnesium hydroxide · May 2026

NHSBSA Prescription Cost Analysis

Figure 1. Senna versus Magnesium hydroxide: national items dispensed by month

▬ Senna   ·   ╌ Magnesium hydroxide

0 209k 418k Jan 2021 Nov 2021 Sep 2022 Jul 2023 May 2024 Mar 2025 May 2026 Magnesium hydrox… 389,942 Jan 2021: 348k Feb 2021: 323k Mar 2021: 358k Apr 2021: 346k May 2021: 331k Jun 2021: 353k Jul 2021: 356k Aug 2021: 341k Sep 2021: 354k Oct 2021: 340k Nov 2021: 350k Dec 2021: 361k Jan 2022: 341k Feb 2022: 320k Mar 2022: 359k Apr 2022: 341k May 2022: 355k Jun 2022: 347k Jul 2022: 347k Aug 2022: 360k Sep 2022: 355k Oct 2022: 352k Nov 2022: 360k Dec 2022: 354k Jan 2023: 356k Feb 2023: 327k Mar 2023: 372k Apr 2023: 336k May 2023: 361k Jun 2023: 370k Jul 2023: 361k Aug 2023: 374k Sep 2023: 364k Oct 2023: 370k Nov 2023: 376k Dec 2023: 368k Jan 2024: 374k Feb 2024: 352k Mar 2024: 352k Apr 2024: 369k May 2024: 375k Jun 2024: 355k Jul 2024: 388k Aug 2024: 374k Sep 2024: 367k Oct 2024: 390k Nov 2024: 372k Dec 2024: 384k Jan 2025: 394k Feb 2025: 353k Mar 2025: 372k Apr 2025: 379k May 2025: 388k Jun 2025: 382k Jul 2025: 409k Aug 2025: 378k Sep 2025: 399k Oct 2025: 410k Nov 2025: 379k Dec 2025: 418k Jan 2026: 403k Feb 2026: 373k Mar 2026: 404k Apr 2026: 404k May 2026: 390k

Source: NHSBSA Prescription Cost Analysis, to May 2026

Senna versus Magnesium hydroxide, May 2026
Measure Senna Magnesium hydroxide
Items, May 2026 389,942 4
Items, last 12 months 4,750,042 61
Net ingredient cost, May 2026 £383,435 £81

See the full profile for Senna or Magnesium hydroxide.