Drug interactions
Desmopressin + Phenylephrine
Severity: Minor
Desmopressin and Phenylephrine: 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
Both drugs can raise blood pressure, so systemic phenylephrine may add to the pressor effect of desmopressin. The effect is usually small at standard desmopressin doses.
What this interaction means in plain words
Desmopressin and Phenylephrine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Desmopressin belongs to Endocrine; Phenylephrine belongs to Respiratory.
Why it happens
Additive pressor effects: alpha-1 vasoconstriction plus V2/V1-mediated effects of desmopressin.
What to do
Monitor blood pressure in patients with hypertension or cardiovascular disease using both drugs.
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 Phenylephrine
- Isocarboxazid + Phenylephrine Contraindicated
- Phenelzine + Phenylephrine Contraindicated
- Phenylephrine + Tranylcypromine Contraindicated
- Bromocriptine + Phenylephrine Major
- Cocaine + Phenylephrine Major
- Dihydroergotamine intranasal + Phenylephrine Major
Other interactions of Desmopressin
Frequently asked questions
Can I take Desmopressin with Phenylephrine?
MediHelp rates the interaction as minor. Desmopressin and Phenylephrine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. Both drugs can raise blood pressure, so systemic phenylephrine may add to the pressor effect of desmopressin. The effect is usually small at standard desmopressin doses.
How serious is the interaction between Desmopressin and Phenylephrine?
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 in patients with hypertension or cardiovascular disease using both drugs.
What other medicines interact with Phenylephrine?
MediHelp also lists interactions of Phenylephrine with, for example, Isocarboxazid, Phenelzine, Tranylcypromine. The full list is on the Phenylephrine page.
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