Drug interactions
Flavoxate + Protriptyline
Severity: Moderate
Flavoxate and Protriptyline: moderate 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
Protriptyline is among the more anticholinergic tricyclic antidepressants. With flavoxate it may cause additive dry mouth, urinary retention, constipation, tachycardia and confusion.
What this interaction means in plain words
Flavoxate and Protriptyline can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken.
Why it happens
Additive antimuscarinic effects.
What to do
Monitor for urinary retention, constipation, tachycardia and cognitive changes. Reduce the dose or stop flavoxate if symptoms develop, especially in older patients.
What to ask your pharmacist
- Should I take them at different times of day?
- Does the dose of either medicine need to change?
- Is there anything I should avoid, such as alcohol or certain foods, while on both?
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Other interactions of Flavoxate
- Clozapine + Flavoxate Major
- Abobotulinumtoxina + Flavoxate Moderate
- Aclidinium + Flavoxate Moderate
- Amantadine + Flavoxate Moderate
- Amitriptyline + Flavoxate Moderate
- Amoxapine + Flavoxate Moderate
Frequently asked questions
Can I take Flavoxate with Protriptyline?
MediHelp rates the interaction as moderate. Flavoxate and Protriptyline can affect each other. The combination is often manageable, but it may need a change of dose, a change of timing, or extra checks while both are taken. Protriptyline is among the more anticholinergic tricyclic antidepressants. With flavoxate it may cause additive dry mouth, urinary retention, constipation, tachycardia and confusion.
How serious is the interaction between Flavoxate and Protriptyline?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for urinary retention, constipation, tachycardia and cognitive changes. Reduce the dose or stop flavoxate if symptoms develop, especially in older patients.
What other medicines interact with Flavoxate?
MediHelp also lists interactions of Flavoxate with, for example, Clozapine, Abobotulinumtoxina, Aclidinium. The full list is on the Flavoxate page.
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