Tamiflu vs Aygestin: side-by-side comparison
Tamiflu (Antiviral Medications) and Aygestin (Women's Sexual Health) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Tamiflu | Aygestin |
|---|---|---|
| Active ingredient | Oseltamivir | Norethindrone |
| Manufacturer | Roche | Various generics |
| Class | Antiviral Medications | Women's Sexual Health |
| Strengths | 30mg, 45mg, 75mg | 5mg |
| Forms | capsule, oral suspension | tablet |
What's the same
Tamiflu and Aygestin are used in very different patients, and the points in common are limited. The main shared element is that both meet regulatory standards for efficacy and safety and benefit from pharmacist oversight.
Key differences
Tamiflu belongs to Antiviral Medications while Aygestin belongs to Women's Sexual Health. Indications, mechanisms and target populations differ. The comparison is most useful when a clinician has mentioned both medications and the patient wants to understand where each fits.
Mechanism and action
Tamiflu: Oseltamivir is a prodrug rapidly hydrolysed by hepatic esterases to the active metabolite oseltamivir carboxylate, which selectively inhibits the neuraminidase enzyme on the surface of influenza A and B viruses. Aygestin: Norethindrone binds to progesterone receptors and exerts progestational effects: thickening cervical mucus, suppressing the LH surge, thinning the endometrium and reducing endometrial implant activity in endometriosis.
When Tamiflu is preferred
Tamiflu is approved in adults and children for the treatment of acute uncomplicated influenza A and B when started within 48 hours of symptom onset, and for post-exposure prophylaxis of influenza A and B in patients aged 1 year and older.
When Aygestin is preferred
Aygestin is approved for endometriosis-associated pain, abnormal uterine bleeding due to hormonal imbalance, and secondary amenorrhoea.
Frequently asked questions
Is Tamiflu or Aygestin better? ▾
Tamiflu and Aygestin are not interchangeable — they treat different conditions. Asking which is "better" is meaningful only when a clinician has weighed both for the same specific clinical scenario.
Can I switch from Tamiflu to Aygestin? ▾
Switching between Tamiflu and Aygestin is rarely an appropriate decision since they belong to different classes and treat different conditions. The real question is usually whether the diagnosis calls for one medication or the other — which the prescriber resolves.
Do Tamiflu and Aygestin have the same side effects? ▾
No — they belong to different classes and have distinct side-effect profiles. Each medication has its own prescribing information.
More Tamiflu comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.