Drug interactions
Calcium + Methylphenidate
Severity: Minor
Calcium and Methylphenidate: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Antacids such as calcium carbonate raise gastric pH, which may alter the release of pH-dependent extended-release methylphenidate formulations. The result could be altered onset or intensity of effect. The clinical significance is uncertain and probably small.
What this interaction means in plain words
Calcium and Methylphenidate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Calcium belongs to Gastrointestinal Tract; Methylphenidate belongs to Central Nervous System.
Why it happens
Higher gastric pH may change drug release from pH-dependent extended-release methylphenidate products.
What to do
Separate calcium antacids from extended-release methylphenidate by a couple of hours where practical. Monitor for changes in clinical response.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Calcium
- Calcium + Ceftriaxone Contraindicated
- Acalabrutinib + Calcium Moderate
- Alendronate + Calcium Moderate
- Atazanavir + Calcium Moderate
- Baloxavir marboxil + Calcium Moderate
- Bendroflumethiazide + Calcium Moderate
Other interactions of Methylphenidate
- Isocarboxazid + Methylphenidate Contraindicated
- Linezolid + Methylphenidate Contraindicated
- Methylphenidate + Phenelzine Contraindicated
- Methylphenidate + Procarbazine Contraindicated
- Methylphenidate + Rasagiline Contraindicated
- Methylphenidate + Safinamide Contraindicated
Frequently asked questions
Can I take Calcium with Methylphenidate?
MediHelp rates the interaction as minor. Calcium and Methylphenidate have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Antacids such as calcium carbonate raise gastric pH, which may alter the release of pH-dependent extended-release methylphenidate formulations. The result could be altered onset or intensity of effect. The clinical significance is uncertain and probably small.
How serious is the interaction between Calcium and Methylphenidate?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Separate calcium antacids from extended-release methylphenidate by a couple of hours where practical. Monitor for changes in clinical response.
What other medicines interact with Calcium?
MediHelp also lists interactions of Calcium with, for example, Ceftriaxone, Acalabrutinib, Alendronate. The full list is on the Calcium page.
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