Drug interactions
Calcium / magnesium / potassium / sodium oxybates + Chlorpheniramine
Severity: Major
Calcium / magnesium / potassium / sodium oxybates and Chlorpheniramine: 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
Oxybates strongly depress the central nervous system, and sedating antihistamines add to this effect. The combination may lead to profound sedation, respiratory depression, coma or death.
What this interaction means in plain words
Calcium / magnesium / potassium / sodium oxybates and Chlorpheniramine 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.
Why it happens
Additive CNS and respiratory depression.
What to do
Avoid chlorpheniramine where possible and use a non-sedating antihistamine. If unavoidable, use minimum doses and monitor closely for sedation and respiratory depression.
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 Chlorpheniramine
Frequently asked questions
Can I take Calcium / magnesium / potassium / sodium oxybates with Chlorpheniramine?
MediHelp rates the interaction as major. Calcium / magnesium / potassium / sodium oxybates and Chlorpheniramine 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. Oxybates strongly depress the central nervous system, and sedating antihistamines add to this effect. The combination may lead to profound sedation, respiratory depression, coma or death.
How serious is the interaction between Calcium / magnesium / potassium / sodium oxybates and Chlorpheniramine?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid chlorpheniramine where possible and use a non-sedating antihistamine. If unavoidable, use minimum doses and monitor closely for sedation and respiratory depression.
What other medicines interact with Chlorpheniramine?
MediHelp also lists interactions of Chlorpheniramine with, for example, Belladonna and opium, Benzhydrocodone / acetaminophen, Brexanolone. The full list is on the Chlorpheniramine page.
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