The short answer
Some magnesium-containing antacids reduce oral sotalol absorption, but that does not establish the same effect for every magnesium supplement. Check the form and follow the two-hour antacid instruction when applicable.
What this answer covers
Oral sotalol with the exact supplement preparation described below.
- Supplement or preparation
- Magnesium
- Medication ingredient
- sotalol
What the original experiment tested
Six healthy volunteers received sotalol with a magnesium hydroxide/aluminum oxide antacid suspension. Simultaneous use lowered drug exposure and reduced its early heart-rate effect. The ingredients were not tested separately.
Use the supported antacid interval
The experiment found no corresponding effect when the antacid was taken two hours after sotalol. Current medicine guidance advises aluminum- or magnesium-containing antacids at least two hours before or after the dose.
Do not treat every magnesium product as equivalent
A nutrient supplement, an antacid and intravenous replacement are different exposures. Low magnesium itself can increase sotalol’s rhythm risk, so a prescribed replacement plan should be maintained with a suitable formulation and schedule.
Keep the rhythm-treatment plan consistent
Sotalol requires attention to kidney function, heart rhythm and potassium and magnesium levels. Do not stop prescribed replacement minerals or change the medicine on your own. A new supplement should be checked against the actual treatment plan.
Evidence and practical considerations
Absorption & effectiveness
Some magnesium-containing antacids reduce oral sotalol absorption, but that does not establish the same effect for every magnesium supplement. Check the form and follow the two-hour antacid instruction when applicable.
- Exact scope
- Oral sotalol with the exact supplement preparation described below. with Oral sotalol; intravenous cases are identified as indirect route evidence where discussed.
- Medication form and route
- oral
What remains uncertain
- Conditional timing follows exact sotalol antacid guidance and combined-antacid human study. The study used magnesium hydroxide/aluminum oxide together; no isolated salt effect or all-magnesium equivalence. Aluminum-antacid advice also explicitly covered by MedlinePlus.
Factors that may matter: Exact ingredient and preparation; Kidney function and clinical indication; Concomitant medicines.
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 sotalol.
Oral sotalol exposure is reduced by the studied aluminum oxide/magnesium hydroxide antacid. The label advises a two-hour interval. Low potassium or magnesium increases the risk of dangerous rhythm effects.
How this applies: Exact active-ingredient and oral-route context.
Label omission of an herb does not prove safety. No invented exact supplement interaction rate or universal spacing rule.
Source 2: Original human study
pubmed.ncbi.nlm.nih.gov · Source check Sep 10, 2026
Population: Six healthy volunteers in a randomized crossover.
Simultaneous use reduced sotalol exposure and its early heart-rate effect; the tested later antacid timing avoided those changes.
How this applies: Exact oral sotalol study with a combined antacid; applying it to Magnesium requires the stated preparation limits.
Small acute study; combined antacid ingredients were not isolated. Not every magnesium salt, vitamin or route. Publisher/PMC full text inaccessible; original abstract read.
Source 3: Government medicine guidance
medlineplus.gov · Source check Sep 10, 2026
Population: People taking sotalol tablets or oral solution.
Advises antacids at least two hours before or after sotalol.
How this applies: Extends the practical antacid instruction while retaining preparation limits.
Consumer medicine guidance, not an isolated aluminum hydroxide trial or proof about every mineral supplement.
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 research draft with exact preparation limits, contrary findings and source-access details. Clinical review not recorded. | |
| Research summary published |
Article revision: d49160a00f3d9305
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.