Drug interactions
Calcium carbonate + Methylphenidate
Severity: Minor
Calcium carbonate 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 may change the release of pH-dependent extended-release methylphenidate formulations such as Ritalin LA. This could alter the onset or intensity of effect. The effect is formulation-specific and generally modest.
What this interaction means in plain words
Calcium carbonate 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 carbonate belongs to Gastrointestinal Tract; Methylphenidate belongs to Central Nervous System.
Why it happens
Raised gastric pH may alter dissolution of pH-dependent extended-release methylphenidate beads.
What to do
Separate calcium carbonate from pH-dependent extended-release methylphenidate 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 carbonate
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 carbonate with Methylphenidate?
MediHelp rates the interaction as minor. Calcium carbonate 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 may change the release of pH-dependent extended-release methylphenidate formulations such as Ritalin LA. This could alter the onset or intensity of effect. The effect is formulation-specific and generally modest.
How serious is the interaction between Calcium carbonate 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 carbonate from pH-dependent extended-release methylphenidate where practical. Monitor for changes in clinical response.
What other medicines interact with Calcium carbonate?
MediHelp also lists interactions of Calcium carbonate with, for example, Acalabrutinib, Alendronate, Amlodipine-hydrochlorothiazide-valsartan. The full list is on the Calcium carbonate page.
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