Drug interactions
Difenoxin + Pentazocine
Severity: Moderate
Difenoxin and Pentazocine: 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
Difenoxin is an opioid-related antidiarrheal metabolite of diphenoxylate. With pentazocine there may be additive CNS depression, and pentazocine may precipitate withdrawal in opioid-dependent patients. Risk is higher with overdose or high doses.
What this interaction means in plain words
Difenoxin and Pentazocine 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.
Difenoxin belongs to Gastrointestinal Tract; Pentazocine belongs to Musculoskeletal.
Why it happens
Additive opioid CNS depression with partial mu antagonism by pentazocine.
What to do
Avoid unnecessary co-use and monitor sedation and respiratory status. Watch opioid-dependent patients for withdrawal.
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 Pentazocine
- Calcium / magnesium / potassium / sodium oxybates + Pentazocine Contraindicated
- Olanzapine / samidorphan + Pentazocine Contraindicated
- Pentazocine + Phenelzine Contraindicated
- Pentazocine + Tranylcypromine Contraindicated
- Alfentanil + Pentazocine Major
- Alprazolam + Pentazocine Major
Other interactions of Difenoxin
Frequently asked questions
Can I take Difenoxin with Pentazocine?
MediHelp rates the interaction as moderate. Difenoxin and Pentazocine 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. Difenoxin is an opioid-related antidiarrheal metabolite of diphenoxylate. With pentazocine there may be additive CNS depression, and pentazocine may precipitate withdrawal in opioid-dependent patients. Risk is higher with overdose or high doses.
How serious is the interaction between Difenoxin and Pentazocine?
MediHelp rates it moderate, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid unnecessary co-use and monitor sedation and respiratory status. Watch opioid-dependent patients for withdrawal.
What other medicines interact with Pentazocine?
MediHelp also lists interactions of Pentazocine with, for example, Calcium / magnesium / potassium / sodium oxybates, Olanzapine / samidorphan, Phenelzine. The full list is on the Pentazocine page.
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