Drug interactions
Desogestrel-ethinyl estradiol + Saquinavir
Severity: Major
Desogestrel-ethinyl estradiol and Saquinavir: major 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
Saquinavir, usually boosted with ritonavir, can lower ethinyl estradiol exposure and may reduce contraceptive efficacy. Hormone levels may change unpredictably.
What this interaction means in plain words
Desogestrel-ethinyl estradiol and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Effects of the ritonavir-boosted regimen on glucuronidation and CYP3A metabolism alter ethinyl estradiol exposure.
What to do
Use a non-hormonal contraceptive method or another reliable alternative instead of the combined pill.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
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Other interactions of Desogestrel-ethinyl estradiol
- Desogestrel-ethinyl estradiol + Fezolinetant Contraindicated
- Aminocaproic acid + Desogestrel-ethinyl estradiol Major
- Amobarbital + Desogestrel-ethinyl estradiol Major
- Anastrozole + Desogestrel-ethinyl estradiol Major
- Apalutamide + Desogestrel-ethinyl estradiol Major
- Atazanavir + Desogestrel-ethinyl estradiol Major
Frequently asked questions
Can I take Desogestrel-ethinyl estradiol with Saquinavir?
MediHelp rates the interaction as major. Desogestrel-ethinyl estradiol and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Saquinavir, usually boosted with ritonavir, can lower ethinyl estradiol exposure and may reduce contraceptive efficacy. Hormone levels may change unpredictably.
How serious is the interaction between Desogestrel-ethinyl estradiol and Saquinavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use a non-hormonal contraceptive method or another reliable alternative instead of the combined pill.
What other medicines interact with Desogestrel-ethinyl estradiol?
MediHelp also lists interactions of Desogestrel-ethinyl estradiol with, for example, Fezolinetant, Aminocaproic acid, Amobarbital. The full list is on the Desogestrel-ethinyl estradiol page.
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