Drug interactions
Guanfacine + Sitagliptin
Severity: Minor
Guanfacine and Sitagliptin: 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 dampen sympathetic warning symptoms of hypoglycemia such as tremor and palpitations. Because sitagliptin rarely causes hypoglycemia on its own, the relevance is mainly when other agents like insulin or sulfonylureas are also used.
What this interaction means in plain words
Guanfacine and Sitagliptin 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; Sitagliptin belongs to Endocrine.
Why it happens
Reduced sympathetic catecholamine-mediated counter-regulatory symptoms through central alpha-2 agonism.
What to do
Advise patients to rely on glucose monitoring rather than symptoms, especially if other hypoglycemic drugs are used.
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?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Guanfacine and Sitagliptin, 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 Sitagliptin
- Albiglutide + Sitagliptin Moderate
- Amlodipine-benazepril + Sitagliptin Moderate
- Aripiprazole + Sitagliptin Moderate
- Asenapine + Sitagliptin Moderate
- Benazepril + Sitagliptin Moderate
- Captopril-hydrochlorothiazide + Sitagliptin Moderate
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 Sitagliptin?
MediHelp rates the interaction as minor. Guanfacine and Sitagliptin 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 dampen sympathetic warning symptoms of hypoglycemia such as tremor and palpitations. Because sitagliptin rarely causes hypoglycemia on its own, the relevance is mainly when other agents like insulin or sulfonylureas are also used.
How serious is the interaction between Guanfacine and Sitagliptin?
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 to rely on glucose monitoring rather than symptoms, especially if other hypoglycemic drugs are used.
What other medicines interact with Sitagliptin?
MediHelp also lists interactions of Sitagliptin with, for example, Albiglutide, Amlodipine-benazepril, Aripiprazole. The full list is on the Sitagliptin 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.
