Drug interactions
Brivaracetam + Diphenhydramine
Severity: Moderate
Brivaracetam and Diphenhydramine: 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
Both agents produce drowsiness and dizziness, so taking them together can cause greater sedation and impaired coordination. Older patients are at higher risk of falls and confusion.
What this interaction means in plain words
Brivaracetam and Diphenhydramine 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.
Brivaracetam belongs to Central Nervous System; Diphenhydramine belongs to Respiratory.
Why it happens
Additive CNS depression from brivaracetam and the sedating antihistamine diphenhydramine.
What to do
Advise patients about additive sedation and avoid driving until response is known. Prefer a non-sedating antihistamine where possible, especially in older adults.
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 Brivaracetam
Other interactions of Diphenhydramine
Frequently asked questions
Can I take Brivaracetam with Diphenhydramine?
MediHelp rates the interaction as moderate. Brivaracetam and Diphenhydramine 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. Both agents produce drowsiness and dizziness, so taking them together can cause greater sedation and impaired coordination. Older patients are at higher risk of falls and confusion.
How serious is the interaction between Brivaracetam and Diphenhydramine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients about additive sedation and avoid driving until response is known. Prefer a non-sedating antihistamine where possible, especially in older adults.
What other medicines interact with Brivaracetam?
MediHelp also lists interactions of Brivaracetam with, for example, Benzhydrocodone / acetaminophen, Sodium oxybate, Acetaminophen / phenyltoloxamine. The full list is on the Brivaracetam page.
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