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Independent analysis of NHS open data
PharmaInsight

Co-magaldrox (Magnesium/aluminium hydroxide) vs Calcium carbonate

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

Calcium carbonate was dispensed 1.3× as often as Co-magaldrox (Magnesium/aluminium hydroxide) in April 2026 — 937 items versus 721 in England.

721items

Co-magaldrox (Magnesium/aluminium hydroxide) · April 2026

NHSBSA Prescription Cost Analysis

937items

Calcium carbonate · April 2026

NHSBSA Prescription Cost Analysis

Figure 1. Co-magaldrox (Magnesium/aluminium hydroxide) versus Calcium carbonate: national items dispensed by month

▬ Co-magaldrox (Magnesium/aluminium hydroxide)   ·   ╌ Calcium carbonate

0 2k 5k Jan 2021 Nov 2021 Sep 2022 Jul 2023 May 2024 Mar 2025 Apr 2026 Calcium carbonat… 721 Jan 2021: 4k Feb 2021: 4k Mar 2021: 5k Apr 2021: 4k May 2021: 4k Jun 2021: 4k Jul 2021: 4k Aug 2021: 4k Sep 2021: 4k Oct 2021: 4k Nov 2021: 4k Dec 2021: 4k Jan 2022: 4k Feb 2022: 4k Mar 2022: 4k Apr 2022: 4k May 2022: 4k Jun 2022: 4k Jul 2022: 4k Aug 2022: 4k Sep 2022: 4k Oct 2022: 4k Nov 2022: 4k Dec 2022: 4k Jan 2023: 4k Feb 2023: 3k Mar 2023: 3k Apr 2023: 2k May 2023: 2k Jun 2023: 2k Jul 2023: 2k Aug 2023: 2k Sep 2023: 3k Oct 2023: 3k Nov 2023: 3k Dec 2023: 2k Jan 2024: 2k Feb 2024: 2k Mar 2024: 2k Apr 2024: 2k May 2024: 2k Jun 2024: 1k Jul 2024: 1k Aug 2024: 946 Sep 2024: 920 Oct 2024: 837 Nov 2024: 730 Dec 2024: 1k Jan 2025: 1k Feb 2025: 1k Mar 2025: 1k Apr 2025: 1k May 2025: 1k Jun 2025: 1k Jul 2025: 1k Aug 2025: 1k Sep 2025: 1k Oct 2025: 1k Nov 2025: 1k Dec 2025: 1k Jan 2026: 1k Feb 2026: 777 Mar 2026: 714 Apr 2026: 721

Source: NHSBSA Prescription Cost Analysis, to April 2026

Co-magaldrox (Magnesium/aluminium hydroxide) versus Calcium carbonate, April 2026
Measure Co-magaldrox (Magnesium/aluminium hydroxide) Calcium carbonate
Items, April 2026 721 937
Items, last 12 months 14,610 11,326
Net ingredient cost, April 2026 £2,534 £16,622

See the full profile for Co-magaldrox (Magnesium/aluminium hydroxide) or Calcium carbonate.