Drug interactions
Guanfacine + Levetiracetam
Severity: Moderate
Guanfacine and Levetiracetam: 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
Guanfacine commonly causes somnolence, fatigue, hypotension and bradycardia, and levetiracetam can add drowsiness and dizziness. Combined use may increase sedation and light-headedness.
What this interaction means in plain words
Guanfacine and Levetiracetam 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.
Guanfacine belongs to Cardiovascular; Levetiracetam belongs to Central Nervous System.
Why it happens
Additive CNS depression from central alpha-2 agonism and the antiepileptic.
What to do
Monitor sedation, blood pressure and heart rate, particularly during titration. Advise caution on rising and driving.
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 Levetiracetam
Other interactions of Guanfacine
- Clonidine + Guanfacine Major
- Guanfacine + Lofexidine Major
- Aldesleukin + Guanfacine Moderate
- Amiodarone + Guanfacine Moderate
- Amisulpride + Guanfacine Moderate
- Amitriptyline + Guanfacine Moderate
Frequently asked questions
Can I take Guanfacine with Levetiracetam?
MediHelp rates the interaction as moderate. Guanfacine and Levetiracetam 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. Guanfacine commonly causes somnolence, fatigue, hypotension and bradycardia, and levetiracetam can add drowsiness and dizziness. Combined use may increase sedation and light-headedness.
How serious is the interaction between Guanfacine and Levetiracetam?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor sedation, blood pressure and heart rate, particularly during titration. Advise caution on rising and driving.
What other medicines interact with Levetiracetam?
MediHelp also lists interactions of Levetiracetam with, for example, Oliceridine, Opium tincture, Sodium oxybate. The full list is on the Levetiracetam page.
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