Drug interactions between digoxin and magaldrate
| Results for the following 2 drugs: |
|---|
| digoxin |
| magaldrate |
Interactions between your selected drugs
digoxin ↔ magaldrate
Applies to:digoxin and magaldrate
Concurrent administration of antacids may decrease the oral bioavailability of digoxin and digitoxin. The mechanism of interaction is unknown. In ten healthy volunteers, administration of a single 0.75 mg dose of digoxin with 60 mL of antacid containing either 4% aluminum hydroxide gel, 8% magnesium hydroxide gel, or 8% magnesium trisilicate resulted in significantly reduced urinary excretion of digoxin (expressed as the percentage of original dose recovered) compared to administration without antacid. Specifically, the cumulative six-day urinary digoxin excretion was 40.1% for control, 30.7% for aluminum hydroxide, 27.1% for magnesium hydroxide, and 29.1% for magnesium trisilicate. In an in vitro study involving absorption across a physiological membrane, cumulative absorption of digoxin 0.25 mg was reduced 11.4% by aluminum hydroxide gel, 15.3% by light magnesium carbonate, and 99.5% by magnesium trisilicate. In a case report, an approximately 50% reduction in digoxin systemic exposure (AUC) was observed when digoxin was administered with 30 mL of an aluminum-magnesium hydroxide antacid and mexiletine. The interaction was attributed to the antacid, as mexiletine is not known to interact with digoxin. Some data also support a potential interaction with digitoxin. However, other studies have found no evidence of a significant interaction between digoxin and various antacids. Based on existing evidence, no special precautions appear necessary, although patients may consider separating the times of administration by 1 to 2 hours if an interaction is suspected.
See also...
Drug Interaction Classification
The classifications below are a guideline only. The relevance of a particular drug interaction to a specific patient is difficult to determine using this tool alone given the large number of variables that may apply.
| Major | Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit. |
| Moderate | Moderately clinically significant. Usually avoid combinations; use it only under special circumstances. |
| Minor | Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan. |
Do not stop taking any medications without consulting your healthcare provider.
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