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Drug Interactions with Desogestrel (Antibiotics, Enzyme Inducers, St John’s Wort)

Drug interactions with desogestrel showing antibiotics that are safe and medicines that reduce effectiveness

Desogestrel (75 mcg) is generally safe to use with most medications. However, certain drugs—especially those that induce liver enzymes (CYP3A4)—can reduce Desogestrel’s effectiveness, increasing the risk of ovulation and unintended pregnancy.

This article provides a complete overview of drug interactions, which medicines are safe, which reduce effectiveness, and what precautions to take. If you’re not taking enzyme-inducing medicines and desogestrel is suitable for you, Order Lovima 75mcg can be ordered online after a quick suitability check.

Do Antibiotics Affect Desogestrel?

Most antibiotics do not interact with Desogestrel.

Antibiotics That Do NOT Reduce Effectiveness

These antibiotics do not reduce hormone levels and do not trigger ovulation.

When to Use Backup Contraception With Antibiotics

Backup contraception is only required if:

In these cases, absorption may be reduced and missed-pill guidance should be followed.

Enzyme-Inducing Medications (CYP3A4 Inducers)

These drugs increase liver metabolism of Desogestrel, reducing levels of etonogestrel (the active form).

Antiepileptic (Anti-Seizure) Medications

Effect: Reduced Desogestrel levels and increased ovulation risk.

Recommendation: Use condoms or switch to a method unaffected by enzyme induction.

Tuberculosis (TB) Medications

These are strong enzyme inducers that significantly reduce effectiveness.

Recommendation: Do not rely on Desogestrel alone. Consider copper IUD or non-hormonal options.

HIV Medications (Certain Antiretrovirals)

These drugs lower etonogestrel levels.

Recommendation: Specialist advice and additional contraception required.

St John’s Wort (Herbal Supplement)

St John’s Wort is a powerful CYP3A4 inducer.

Effect: Reduced contraceptive effectiveness and risk of ovulation.

Recommendation: Avoid use while taking Desogestrel.

Medications With Mild or Uncertain Interaction

Some medicines may interact depending on dose or individual metabolism.

Backup contraception or alternative methods may be advised.

Medications That Do NOT Affect Desogestrel

Painkillers

Antidepressants

Anxiety Medications

Other Common Medications

None of these reduce Desogestrel effectiveness.

Gastrointestinal Issues (Vomiting & Diarrhoea)

Vomiting

If vomiting occurs within 3 hours of taking Desogestrel:

Severe Diarrhoea

Interaction With Other Hormonal Contraceptives

Desogestrel and Combined Pills

Not recommended due to unpredictable bleeding.

Desogestrel and Implants or IUDs

Usually unnecessary unless advised for specific clinical reasons.

Desogestrel and Emergency Contraception

Summary of Key Interactions

Strong Interactions (Use Backup or Avoid)

Mild or Uncertain Interactions

Safe With Desogestrel

Clinical Summary

Desogestrel is compatible with most medications. The main concern is enzyme-inducing drugs, which can significantly reduce effectiveness. Antibiotics (except rifampicin and rifabutin) do not interfere with Desogestrel.

Women using interacting medicines should use backup contraception or switch to a method unaffected by enzyme induction. If desogestrel remains appropriate for you (and you’re following the interaction advice above), Order Hana 75mcg (Desogestrel) Tablets is available to purchase online with discreet delivery.