Drug interactions
Dicyclomine + Trifluoperazine
Severity: Moderate
Dicyclomine and Trifluoperazine: 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
Trifluoperazine has some anticholinergic activity and combined with dicyclomine may cause additive effects such as dry mouth, constipation, urinary retention, blurred vision and confusion. Slowed gastric emptying could theoretically alter oral phenothiazine absorption, but the clinical significance is uncertain.
What this interaction means in plain words
Dicyclomine and Trifluoperazine 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 anticholinergic effects, with possible reduced GI absorption of trifluoperazine from slowed motility.
What to do
Monitor for anticholinergic adverse effects and for reduced antipsychotic response. Reduce the anticholinergic load if problems occur, particularly in elderly 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 Dicyclomine
- Clozapine + Dicyclomine Major
- Dicyclomine + Henbane Major
- Dicyclomine + Imipramine Major
- Dicyclomine + Pramlintide Major
- Abobotulinumtoxina + Dicyclomine Moderate
- Aclidinium + Dicyclomine Moderate
Frequently asked questions
Can I take Dicyclomine with Trifluoperazine?
MediHelp rates the interaction as moderate. Dicyclomine and Trifluoperazine 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. Trifluoperazine has some anticholinergic activity and combined with dicyclomine may cause additive effects such as dry mouth, constipation, urinary retention, blurred vision and confusion. Slowed gastric emptying could theoretically alter oral phenothiazine absorption, but the clinical significance is uncertain.
How serious is the interaction between Dicyclomine and Trifluoperazine?
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 anticholinergic adverse effects and for reduced antipsychotic response. Reduce the anticholinergic load if problems occur, particularly in elderly patients.
What other medicines interact with Dicyclomine?
MediHelp also lists interactions of Dicyclomine with, for example, Clozapine, Henbane, Imipramine. The full list is on the Dicyclomine page.
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