Drug interactions
Ethinyl estradiol-drospirenone + Potassium phosphates
Severity: Moderate
Ethinyl estradiol-drospirenone and Potassium phosphates: 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
Intravenous potassium phosphates deliver a rapid potassium load, and drospirenone limits renal potassium excretion. Hyperkalemia with cardiac effects is possible.
What this interaction means in plain words
Ethinyl estradiol-drospirenone and Potassium phosphates 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 hyperkalemia from drospirenone's antimineralocorticoid action and exogenous potassium.
What to do
Monitor serum potassium and ECG as clinically indicated during IV potassium replacement. Consider holding the drospirenone product in patients with significant renal impairment or hyperkalemia.
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 Ethinyl estradiol-drospirenone
- Ethinyl estradiol-drospirenone + Fezolinetant Contraindicated
- Ethinyl estradiol-drospirenone + Ombitasvir / paritaprevir / ritonavir Contraindicated
- Ethinyl estradiol-drospirenone + Ombitasvir / paritaprevir / ritonavir and dasabuvir Contraindicated
- Ethinyl estradiol-drospirenone + Tranexamic acid Contraindicated
- Aminocaproic acid + Ethinyl estradiol-drospirenone Major
- Amobarbital + Ethinyl estradiol-drospirenone Major
Frequently asked questions
Can I take Ethinyl estradiol-drospirenone with Potassium phosphates?
MediHelp rates the interaction as moderate. Ethinyl estradiol-drospirenone and Potassium phosphates 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. Intravenous potassium phosphates deliver a rapid potassium load, and drospirenone limits renal potassium excretion. Hyperkalemia with cardiac effects is possible.
How serious is the interaction between Ethinyl estradiol-drospirenone and Potassium phosphates?
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 serum potassium and ECG as clinically indicated during IV potassium replacement. Consider holding the drospirenone product in patients with significant renal impairment or hyperkalemia.
What other medicines interact with Ethinyl estradiol-drospirenone?
MediHelp also lists interactions of Ethinyl estradiol-drospirenone with, for example, Fezolinetant, Ombitasvir / paritaprevir / ritonavir, Ombitasvir / paritaprevir / ritonavir and dasabuvir. The full list is on the Ethinyl estradiol-drospirenone page.
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