Propecia vs Aygestin: side-by-side comparison
Propecia (Male and Female Pattern Hair Loss) 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 | Propecia | Aygestin |
|---|---|---|
| Active ingredient | Finasteride | Norethindrone |
| Manufacturer | Merck | Various generics |
| Class | Male and Female Pattern Hair Loss | Women's Sexual Health |
| Strengths | 1mg | 5mg |
| Forms | tablet | tablet |
What's the same
Propecia 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
Propecia belongs to Male and Female Pattern Hair Loss 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
Propecia: DHT, produced from testosterone by 5-alpha-reductase, drives miniaturisation of scalp hair follicles in genetically susceptible men, gradually shortening anagen growth phases until follicles produce only fine vellus hair… 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 Propecia is preferred
Propecia is approved for the treatment of male pattern hair loss (androgenetic alopecia) in men aged 18 to 41.
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 Propecia or Aygestin better? ▾
Propecia 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 Propecia to Aygestin? ▾
Switching between Propecia 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 Propecia 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 Propecia comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.