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Does Guanfacine Interact with Esmolol Hydrochloride?

Guanfacine and Esmolol Hydrochloride have a major drug interaction according to U.S. FDA drug labeling data. Beta blockers increase risk of guanfacine-withdrawal rebound hypertension. If antihypertensive therapy must be interrupted, discontinue beta blocker first and gradually. The mechanism involves beta blockade may precipitate increased withdrawal effects. Patients taking both medications should consult their healthcare provider before starting, stopping, or changing the dosage of either drug. This information is based on official FDA drug labeling sourced from OpenFDA and the NIH National Library of Medicine.

Severity
Major
Guanfacine Class
Central alpha-2 Adrenergic Agonist
Management
Close medical supervision required
Data Source
U.S. FDA via OpenFDA

How This Interaction Works

The interaction between Guanfacine and Esmolol Hydrochloride occurs because beta blockade may precipitate increased withdrawal effects. Clinically, this means beta blockers increase risk of guanfacine-withdrawal rebound hypertension. if antihypertensive therapy must be interrupted, discontinue beta blocker first and gradually. This is classified as a major interaction, meaning it could cause serious harm if not properly managed. Your healthcare provider may need to adjust dosages, substitute one medication, or increase monitoring frequency.

What To Tell Your Doctor or Pharmacist

If you are taking Guanfacine and your doctor is considering prescribing Esmolol Hydrochloride (or vice versa), make sure to:

  • Inform your doctor and pharmacist of all current medications, including over-the-counter drugs and supplements
  • Ask whether the benefits of combining these medications outweigh the risks for your specific situation
  • Ask what symptoms to watch for that would indicate the interaction is causing problems
  • Ask how frequently you should be monitored while these are co-prescribed
  • Ask whether any dosage adjustments are needed
  • Never stop or change either medication without first consulting your healthcare provider
💊 Guanfacine(Guanfacine Extended-Release)+💊 Esmolol Hydrochloride(Esmolol Hydrochloride)

Severity & Interaction Details

⚠️
major
Use with caution — major interaction
Serious risk of clinically significant harm. Generally avoid; if used, monitor closely.
Severity scale
MinorContra
On record
Yes
Drug A class
Central alpha-2 Adrenergic Agonist
Drug B class
—
Source
NLP:esmolol hydrochloride

What this means in plain English

Beta blockers increase risk of guanfacine-withdrawal rebound hypertension. If antihypertensive therapy must be interrupted, discontinue beta blocker first and gradually.

What the FDA label says

"Beta blockade may precipitate increased withdrawal effects"

📖 Source: NLP:esmolol hydrochloride

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Data sourced from U.S. FDA drug labeling via openFDA and the NIH National Library of Medicine. For informational purposes only. Always consult your pharmacist or physician.