Drug interactions
Guanfacine + Insulin glargine
Severity: Minor
Guanfacine and Insulin glargine: 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 some adrenergic warning symptoms of hypoglycemia such as tremor and palpitations. Patients on insulin may therefore be less aware of falling glucose.
What this interaction means in plain words
Guanfacine and Insulin glargine 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; Insulin glargine belongs to Endocrine.
Why it happens
Reduced central sympathetic outflow dampens catecholamine-mediated hypoglycemia symptoms.
What to do
Counsel the patient that sweating may be the main warning sign and advise more frequent glucose self-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 Insulin glargine
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 Insulin glargine?
MediHelp rates the interaction as minor. Guanfacine and Insulin glargine 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 some adrenergic warning symptoms of hypoglycemia such as tremor and palpitations. Patients on insulin may therefore be less aware of falling glucose.
How serious is the interaction between Guanfacine and Insulin glargine?
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 sweating may be the main warning sign and advise more frequent glucose self-monitoring.
What other medicines interact with Insulin glargine?
MediHelp also lists interactions of Insulin glargine with, for example, Alogliptin-pioglitazone, Ethanol, Glimepiride-pioglitazone. The full list is on the Insulin glargine page.
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