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Independent analysis of NHS open data
PharmaInsight

Calcium carbonate vs Magnesium aspartate

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

Calcium carbonate was dispensed 4.9× as often as Magnesium aspartate in April 2026 — 35,580 items versus 7,302 in England.

35,580items

Calcium carbonate · April 2026

NHSBSA Prescription Cost Analysis

7,302items

Magnesium aspartate · April 2026

NHSBSA Prescription Cost Analysis

Figure 1. Calcium carbonate versus Magnesium aspartate: national items dispensed by month

▬ Calcium carbonate   ·   ╌ Magnesium aspartate

0 19k 38k Jan 2021 Nov 2021 Sep 2022 Jul 2023 May 2024 Mar 2025 Apr 2026 Magnesium aspart… 35,580 Jan 2021: 33k Feb 2021: 31k Mar 2021: 35k Apr 2021: 34k May 2021: 32k Jun 2021: 34k Jul 2021: 34k Aug 2021: 33k Sep 2021: 34k Oct 2021: 32k Nov 2021: 33k Dec 2021: 35k Jan 2022: 33k Feb 2022: 31k Mar 2022: 35k Apr 2022: 32k May 2022: 34k Jun 2022: 33k Jul 2022: 33k Aug 2022: 34k Sep 2022: 33k Oct 2022: 33k Nov 2022: 33k Dec 2022: 32k Jan 2023: 32k Feb 2023: 30k Mar 2023: 36k Apr 2023: 31k May 2023: 33k Jun 2023: 33k Jul 2023: 33k Aug 2023: 33k Sep 2023: 33k Oct 2023: 33k Nov 2023: 34k Dec 2023: 34k Jan 2024: 34k Feb 2024: 33k Mar 2024: 33k Apr 2024: 35k May 2024: 35k Jun 2024: 33k Jul 2024: 36k Aug 2024: 35k Sep 2024: 34k Oct 2024: 36k Nov 2024: 35k Dec 2024: 36k Jan 2025: 36k Feb 2025: 33k Mar 2025: 35k Apr 2025: 35k May 2025: 37k Jun 2025: 36k Jul 2025: 38k Aug 2025: 35k Sep 2025: 37k Oct 2025: 38k Nov 2025: 35k Dec 2025: 38k Jan 2026: 37k Feb 2026: 34k Mar 2026: 37k Apr 2026: 36k

Source: NHSBSA Prescription Cost Analysis, to April 2026

Calcium carbonate versus Magnesium aspartate, April 2026
Measure Calcium carbonate Magnesium aspartate
Items, April 2026 35,580 7,302
Items, last 12 months 436,489 90,280
Net ingredient cost, April 2026 £199,239 £285,649

See the full profile for Calcium carbonate or Magnesium aspartate.