Drug interactions
Diamorphine + Topiramate
Severity: Moderate
Diamorphine and Topiramate: 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
Diamorphine (heroin) combined with topiramate may cause additive sedation, dizziness and cognitive impairment. Opioids taken with other CNS depressants increase the risk of respiratory depression.
What this interaction means in plain words
Diamorphine and Topiramate 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 CNS and respiratory depression from opioid agonism and topiramate.
What to do
Titrate diamorphine carefully and monitor sedation and respiratory rate. Counsel patients to avoid driving and alcohol.
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 Topiramate
Frequently asked questions
Can I take Diamorphine with Topiramate?
MediHelp rates the interaction as moderate. Diamorphine and Topiramate 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. Diamorphine (heroin) combined with topiramate may cause additive sedation, dizziness and cognitive impairment. Opioids taken with other CNS depressants increase the risk of respiratory depression.
How serious is the interaction between Diamorphine and Topiramate?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Titrate diamorphine carefully and monitor sedation and respiratory rate. Counsel patients to avoid driving and alcohol.
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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