Drug interactions
Chlorthalidone + Fentanyl transmucosal
Severity: Minor
Chlorthalidone and Fentanyl transmucosal: 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
Opioids such as fentanyl may promote antidiuretic hormone release and can reduce the diuretic response to chlorthalidone. Opioids can also cause urinary retention and orthostatic hypotension, which may complicate diuretic therapy.
What this interaction means in plain words
Chlorthalidone and Fentanyl transmucosal have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Opioid-induced ADH release and urinary retention oppose diuresis, with additive orthostatic hypotension.
What to do
Monitor blood pressure, fluid balance and urinary output when fentanyl is started. Adjust the diuretic dose if response diminishes.
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 Chlorthalidone
Frequently asked questions
Can I take Chlorthalidone with Fentanyl transmucosal?
MediHelp rates the interaction as minor. Chlorthalidone and Fentanyl transmucosal have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Opioids such as fentanyl may promote antidiuretic hormone release and can reduce the diuretic response to chlorthalidone. Opioids can also cause urinary retention and orthostatic hypotension, which may complicate diuretic therapy.
How serious is the interaction between Chlorthalidone and Fentanyl transmucosal?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor blood pressure, fluid balance and urinary output when fentanyl is started. Adjust the diuretic dose if response diminishes.
What other medicines interact with Chlorthalidone?
MediHelp also lists interactions of Chlorthalidone with, for example, Amifostine, Atenolol-chlorthalidone, Candesartan-hydrochlorothiazide. The full list is on the Chlorthalidone page.
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