Drug interactions
Ethinyl estradiol-norgestimate + Ombitasvir / paritaprevir / ritonavir and dasabuvir
Severity: Contraindicated
Ethinyl estradiol-norgestimate and Ombitasvir / paritaprevir / ritonavir and dasabuvir: contraindicated 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
Coadministration of ethinyl estradiol-containing products with this HCV regimen has produced marked ALT elevations in clinical trials. The risk of liver injury makes the combination unsuitable. Ritonavir may also reduce contraceptive hormone exposure.
What this interaction means in plain words
Ethinyl estradiol-norgestimate and Ombitasvir / paritaprevir / ritonavir and dasabuvir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two.
Why it happens
The mechanism of the ALT elevation is not established; ritonavir may also alter estrogen metabolism.
What to do
Avoid ethinyl estradiol-containing contraceptives before and during this regimen. Switch to a progestin-only or non-hormonal method and restart estrogen only after the regimen has been completed, as advised in the labeling.
What to ask your pharmacist
- Is there an alternative to one of these two medicines for me?
- If both are essential, who is monitoring me and how often?
- Which symptoms mean I should stop and seek help straight away?
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Other interactions of Ethinyl estradiol-norgestimate
- Ethinyl estradiol-norgestimate + Fezolinetant Contraindicated
- Ethinyl estradiol-norgestimate + Tranexamic acid Contraindicated
- Aminocaproic acid + Ethinyl estradiol-norgestimate Major
- Amobarbital + Ethinyl estradiol-norgestimate Major
- Anastrozole + Ethinyl estradiol-norgestimate Major
- Apalutamide + Ethinyl estradiol-norgestimate Major
Frequently asked questions
Can I take Ethinyl estradiol-norgestimate with Ombitasvir / paritaprevir / ritonavir and dasabuvir?
MediHelp rates the interaction as contraindicated. Ethinyl estradiol-norgestimate and Ombitasvir / paritaprevir / ritonavir and dasabuvir are not normally used together. Taking them at the same time is expected to cause harm or make one of them unsafe, so a different medicine is usually chosen for one of the two. Coadministration of ethinyl estradiol-containing products with this HCV regimen has produced marked ALT elevations in clinical trials. The risk of liver injury makes the combination unsuitable. Ritonavir may also reduce contraceptive hormone exposure.
How serious is the interaction between Ethinyl estradiol-norgestimate and Ombitasvir / paritaprevir / ritonavir and dasabuvir?
MediHelp rates it contraindicated, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Avoid ethinyl estradiol-containing contraceptives before and during this regimen. Switch to a progestin-only or non-hormonal method and restart estrogen only after the regimen has been completed, as advised in the labeling.
What other medicines interact with Ethinyl estradiol-norgestimate?
MediHelp also lists interactions of Ethinyl estradiol-norgestimate with, for example, Fezolinetant, Tranexamic acid, Aminocaproic acid. The full list is on the Ethinyl estradiol-norgestimate page.
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