Drug interactions
Guanfacine + Sertraline
Severity: Minor
Guanfacine and Sertraline: minor 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 is cleared mainly by CYP3A4, but sertraline is only a weak inhibitor of this enzyme, so a significant rise in guanfacine levels is not expected. Any increase could cause hypotension, bradycardia and sedation.
What this interaction means in plain words
Guanfacine and Sertraline have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Guanfacine belongs to Cardiovascular; Sertraline belongs to Central Nervous System.
Why it happens
Weak CYP3A4 inhibition by sertraline may modestly reduce guanfacine clearance.
What to do
No routine dose change is required. Monitor blood pressure, heart rate and sedation, especially during dose changes.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Sertraline
- Isocarboxazid + Sertraline Contraindicated
- Methylene blue + Sertraline Contraindicated
- Phenelzine + Sertraline Contraindicated
- Pimozide + Sertraline Contraindicated
- Selegiline transdermal + Sertraline Contraindicated
- Selegiline + Sertraline Contraindicated
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 Sertraline?
MediHelp rates the interaction as minor. Guanfacine and Sertraline have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Guanfacine is cleared mainly by CYP3A4, but sertraline is only a weak inhibitor of this enzyme, so a significant rise in guanfacine levels is not expected. Any increase could cause hypotension, bradycardia and sedation.
How serious is the interaction between Guanfacine and Sertraline?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: No routine dose change is required. Monitor blood pressure, heart rate and sedation, especially during dose changes.
What other medicines interact with Sertraline?
MediHelp also lists interactions of Sertraline with, for example, Isocarboxazid, Methylene blue, Phenelzine. The full list is on the Sertraline page.
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