Drug interactions
Guanfacine + Paliperidone
Severity: Moderate
Guanfacine and Paliperidone: 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 drugs can lower blood pressure, and paliperidone's alpha-1 blockade adds to guanfacine's central alpha-2 agonism. Patients may have dizziness, orthostatic hypotension, syncope, bradycardia and excess sedation.
What this interaction means in plain words
Guanfacine and Paliperidone 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; Paliperidone belongs to Central Nervous System.
Why it happens
Additive hypotensive and sedative effects from alpha-2 agonism and alpha-1 adrenergic antagonism.
What to do
Monitor blood pressure and heart rate, especially at initiation and dose changes. Advise patients to rise slowly and reduce the dose if symptomatic.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Guanfacine and Paliperidone, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
Other interactions of Paliperidone
- Ibutilide + Paliperidone Contraindicated
- Paliperidone + Pimozide Contraindicated
- Paliperidone + Vandetanib Contraindicated
- Adagrasib + Paliperidone Major
- Amiodarone + Paliperidone Major
- Amisulpride + Paliperidone Major
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 Paliperidone?
MediHelp rates the interaction as moderate. Guanfacine and Paliperidone 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 drugs can lower blood pressure, and paliperidone's alpha-1 blockade adds to guanfacine's central alpha-2 agonism. Patients may have dizziness, orthostatic hypotension, syncope, bradycardia and excess sedation.
How serious is the interaction between Guanfacine and Paliperidone?
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 blood pressure and heart rate, especially at initiation and dose changes. Advise patients to rise slowly and reduce the dose if symptomatic.
What other medicines interact with Paliperidone?
MediHelp also lists interactions of Paliperidone with, for example, Ibutilide, Pimozide, Vandetanib. The full list is on the Paliperidone page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
