Drug interactions
Sodium sulfate / ?magnesium sulfate / potassium chloride + Verapamil
Severity: Moderate
Sodium sulfate / ?magnesium sulfate / potassium chloride and Verapamil: moderate 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
Magnesium absorbed from sulfate bowel preparations can add to the calcium channel blocking effect of verapamil, particularly with renal impairment or dehydration. This may cause hypotension or muscle weakness. Large fluid and electrolyte shifts from bowel cleansing can also affect cardiovascular stability.
What this interaction means in plain words
Sodium sulfate / ?magnesium sulfate / potassium chloride and Verapamil can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive physiological antagonism of calcium-dependent cardiac and vascular smooth muscle function by magnesium and verapamil.
What to do
Ensure adequate hydration and monitor blood pressure and neuromuscular symptoms; check serum magnesium in patients with renal impairment.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Verapamil
- Dofetilide + Verapamil Contraindicated
- Flibanserin + Verapamil Contraindicated
- Lomitapide + Verapamil Contraindicated
- Lonafarnib + Verapamil Contraindicated
- Pimozide + Verapamil Contraindicated
- Acebutolol + Verapamil Major
Frequently asked questions
Can I take Sodium sulfate / ?magnesium sulfate / potassium chloride with Verapamil?
MediHelp rates the interaction as moderate. Sodium sulfate / ?magnesium sulfate / potassium chloride and Verapamil can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Magnesium absorbed from sulfate bowel preparations can add to the calcium channel blocking effect of verapamil, particularly with renal impairment or dehydration. This may cause hypotension or muscle weakness. Large fluid and electrolyte shifts from bowel cleansing can also affect cardiovascular stability.
How serious is the interaction between Sodium sulfate / ?magnesium sulfate / potassium chloride and Verapamil?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Ensure adequate hydration and monitor blood pressure and neuromuscular symptoms; check serum magnesium in patients with renal impairment.
What other medicines interact with Verapamil?
MediHelp also lists interactions of Verapamil with, for example, Dofetilide, Flibanserin, Lomitapide. The full list is on the Verapamil page.
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