Drug interactions
Glyburide-metformin + Guanfacine
Severity: Minor
Glyburide-metformin 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 is a centrally acting alpha-2 agonist that reduces sympathetic outflow and may blunt adrenergic warning signs of hypoglycemia such as tremor and palpitations. Patients on glyburide may therefore fail to recognize low blood glucose, although sweating is usually preserved.
What this interaction means in plain words
Glyburide-metformin 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.
Glyburide-metformin belongs to Endocrine; Guanfacine belongs to Cardiovascular.
Why it happens
Reduced sympathetic and catecholamine-mediated symptoms of hypoglycemia through central alpha-2 agonism.
What to do
Counsel the patient that hypoglycemia may be less noticeable and advise regular blood glucose monitoring. Check glucose when symptoms such as sweating or confusion appear.
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 Glyburide-metformin
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 Glyburide-metformin with Guanfacine?
MediHelp rates the interaction as minor. Glyburide-metformin 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 is a centrally acting alpha-2 agonist that reduces sympathetic outflow and may blunt adrenergic warning signs of hypoglycemia such as tremor and palpitations. Patients on glyburide may therefore fail to recognize low blood glucose, although sweating is usually preserved.
How serious is the interaction between Glyburide-metformin 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: Counsel the patient that hypoglycemia may be less noticeable and advise regular blood glucose monitoring. Check glucose when symptoms such as sweating or confusion appear.
What other medicines interact with Glyburide-metformin?
MediHelp also lists interactions of Glyburide-metformin with, for example, Bosentan, Cholic acid, Clarithromycin. The full list is on the Glyburide-metformin page.
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