Drug interactions
Gliclazide + Guanfacine
Severity: Minor
Gliclazide and Guanfacine: 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, a central alpha-2 agonist, may blunt the adrenergic warning symptoms of hypoglycaemia such as tremor and palpitations. Patients on gliclazide may therefore fail to recognise falling glucose levels.
What this interaction means in plain words
Gliclazide and Guanfacine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Gliclazide belongs to Endocrine; Guanfacine belongs to Cardiovascular.
Why it happens
Reduced sympathetic outflow dampens catecholamine-mediated hypoglycaemia symptoms.
What to do
Advise patients that sweating may remain a symptom and encourage regular blood glucose monitoring.
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 Gliclazide
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 Gliclazide with Guanfacine?
MediHelp rates the interaction as minor. Gliclazide and Guanfacine 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, a central alpha-2 agonist, may blunt the adrenergic warning symptoms of hypoglycaemia such as tremor and palpitations. Patients on gliclazide may therefore fail to recognise falling glucose levels.
How serious is the interaction between Gliclazide and Guanfacine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Advise patients that sweating may remain a symptom and encourage regular blood glucose monitoring.
What other medicines interact with Gliclazide?
MediHelp also lists interactions of Gliclazide with, for example, Ciprofloxacin, Clarithromycin, Disopyramide. The full list is on the Gliclazide page.
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