The short answer
Check whether your magnesium product is an antacid before taking it with oral prochlorperazine. The product information warns about antacids, but it does not establish an interaction with every magnesium preparation.
What this answer covers
Oral prochlorperazine with the exact supplement preparation described.
- Supplement or preparation
- Magnesium
- Medication ingredient
- prochlorperazine
The warning is about antacid products
The oral Stemetil product information says antacids can interfere with absorption of neuroleptics. This supports reviewing an antacid alongside oral prochlorperazine, but it does not mean every source of magnesium has the same effect.
Confirm the salt, purpose and route
A magnesium name may refer to different salts and preparations. A product used as an antacid is not automatically equivalent to a nutritional capsule, food exposure or another formulation. The absorption concern also cannot be applied unchanged to nonoral prochlorperazine.
The magnitude and interval are not defined here
The inspected product information does not quantify the change for this generic mineral pair or identify a tested hours-apart schedule. A trial involving another phenothiazine would not supply an exact prochlorperazine estimate.
Ask the pharmacist to check the actual product
Bring both packages so the pharmacist can confirm whether antacid-specific instructions apply. Do not increase prochlorperazine or stop a necessary supplement merely because the ingredient name appears in a broad interaction list.
Evidence and practical considerations
Absorption & effectiveness
Check whether your magnesium product is an antacid before taking it with oral prochlorperazine. The product information warns about antacids, but it does not establish an interaction with every magnesium preparation.
- Exact scope
- Oral prochlorperazine with the exact supplement preparation described. with Oral prochlorperazine with the stated label and formulation limits.
- Medication form and route
- oral
What remains uncertain
- Exact oral Stemetil SmPC antacid-class precaution retained; generic elemental node does not identify salt, antacid activity, formulation or dose. No exact mineral trial/magnitude or fixed protective gap; nonoral routes not extrapolated.
Factors that may matter: Exact preparation and amount; Other medicines; Seizure history, alertness or electrolyte status where relevant.
Read the supporting source summaries
Source 1: Current U.S. regulatory product labeling
dailymed.nlm.nih.gov · Source check Sep 10, 2026
Population: Patients prescribed oral prochlorperazine.
Oral prochlorperazine can cause drowsiness, dizziness, hypotension and anticholinergic effects. Phenothiazine adverse effects include photosensitivity.
How this applies: Exact ingredient and oral-route clinical context.
Label class warnings do not establish every exact botanical interaction, event rate or protective supplement interval.
Source 2: Current regulatory product information
medicines.org.uk · Source check Sep 10, 2026
Population: Patients prescribed oral prochlorperazine maleate tablets.
The interaction section says antacids interfere with absorption of neuroleptics. It separately warns of added CNS depressant and anticholinergic effects.
How this applies: Exact oral product guidance supporting a narrow antacid precaution.
The statement does not identify every mineral salt, measure an aluminum/calcium/magnesium dose effect, or supply a tested dosing gap. Nonoral routes differ.
Research assessment: · Open full citations ↗
Review and change history
- Publication status
- Published research summary
- Clinical review
- Not yet recorded
| Date | Update |
|---|---|
| Article prepared | |
| Initial source-checked draft with exact preparation limits, original study findings and uncertainty. Clinical review not recorded. | |
| Research summary published |
Article revision: f09ed8820099d272
This guide brings together the evidence records used by our interaction checker. Each finding retains its own preparation limits, research date, and source summaries.
Full citations require verification. Reading this answer and the source summaries does not.
Taking other supplements or medications?
Use the checker to explore your other combinations. Ask a pharmacist to review the exact products, amounts and medical conditions in your complete list.
Open the interaction checkerInformation, not medical advice. Do not change prescribed treatment based on this guide.