Drug interactions
Diphenhydramine + Pramlintide
Severity: Moderate
Diphenhydramine and Pramlintide: 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
Pramlintide slows gastric emptying and diphenhydramine has anticholinergic properties that reduce gastrointestinal motility. Together they may cause constipation, bloating and delayed gastric emptying.
What this interaction means in plain words
Diphenhydramine and Pramlintide 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.
Diphenhydramine belongs to Respiratory; Pramlintide belongs to Endocrine.
Why it happens
Additive slowing of gastrointestinal motility from amylin analogue and antimuscarinic effects.
What to do
Avoid pramlintide with drugs that slow gastric motility where possible, or monitor for gastrointestinal symptoms and glucose changes. Consider a non-sedating antihistamine without anticholinergic activity.
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 Diphenhydramine
Other interactions of Pramlintide
Frequently asked questions
Can I take Diphenhydramine with Pramlintide?
MediHelp rates the interaction as moderate. Diphenhydramine and Pramlintide 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. Pramlintide slows gastric emptying and diphenhydramine has anticholinergic properties that reduce gastrointestinal motility. Together they may cause constipation, bloating and delayed gastric emptying.
How serious is the interaction between Diphenhydramine and Pramlintide?
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 pramlintide with drugs that slow gastric motility where possible, or monitor for gastrointestinal symptoms and glucose changes. Consider a non-sedating antihistamine without anticholinergic activity.
What other medicines interact with Diphenhydramine?
MediHelp also lists interactions of Diphenhydramine with, for example, Alfentanil, Belladonna and opium, Benzhydrocodone / acetaminophen. The full list is on the Diphenhydramine page.
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