Drug interactions
Dichlorphenamide + Topiramate
Severity: Major
Dichlorphenamide and Topiramate: major 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
Both drugs are carbonic anhydrase inhibitors that can cause metabolic acidosis and hypokalemia. Combined use can worsen acid-base and potassium disturbances, and may increase the risk of kidney stones and paresthesias.
What this interaction means in plain words
Dichlorphenamide and Topiramate can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Dichlorphenamide belongs to Miscellaneous; Topiramate belongs to Central Nervous System.
Why it happens
Additive carbonic anhydrase inhibition causing bicarbonate loss, metabolic acidosis and renal potassium wasting.
What to do
Measure serum bicarbonate and potassium at baseline and periodically, and correct abnormalities. Reduce the dose or stop one drug if persistent acidosis develops.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Topiramate
- Benzhydrocodone / acetaminophen + Topiramate Major
- Buprenorphine long-acting + Topiramate Major
- Buprenorphine subdermal implant + Topiramate Major
- Buprenorphine transdermal + Topiramate Major
- Calcium / magnesium / potassium / sodium oxybates + Topiramate Major
- Levonorgestrel oral / ethinylestradiol / ferrous bisglycinate + Topiramate Major
Other interactions of Dichlorphenamide
Frequently asked questions
Can I take Dichlorphenamide with Topiramate?
MediHelp rates the interaction as major. Dichlorphenamide and Topiramate can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Both drugs are carbonic anhydrase inhibitors that can cause metabolic acidosis and hypokalemia. Combined use can worsen acid-base and potassium disturbances, and may increase the risk of kidney stones and paresthesias.
How serious is the interaction between Dichlorphenamide and Topiramate?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Measure serum bicarbonate and potassium at baseline and periodically, and correct abnormalities. Reduce the dose or stop one drug if persistent acidosis develops.
What other medicines interact with Topiramate?
MediHelp also lists interactions of Topiramate with, for example, Benzhydrocodone / acetaminophen, Buprenorphine long-acting, Buprenorphine subdermal implant. The full list is on the Topiramate page.
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