Aygestin vs Yaz: side-by-side comparison
Aygestin (Women's Sexual Health) and Yaz (Hormones and Birth Control) belong to different therapeutic classes and are rarely interchangeable. This page compares the medications' purposes, mechanisms and the situations where each is used.
| Property | Aygestin | Yaz |
|---|---|---|
| Active ingredient | Norethindrone | Drospirenone |
| Manufacturer | Various generics | Bayer |
| Class | Women's Sexual Health | Hormones and Birth Control |
| Strengths | 5mg | 3mg/0.02mg |
| Forms | tablet | tablet |
What's the same
Aygestin and Yaz 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
Aygestin belongs to Women's Sexual Health while Yaz belongs to Hormones and Birth Control. 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
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. Yaz: Yaz prevents pregnancy through three mechanisms: ovulation suppression (the dominant effect), thickening of cervical mucus to impede sperm transit, and changes in endometrial receptivity.
When Aygestin is preferred
Aygestin is approved for endometriosis-associated pain, abnormal uterine bleeding due to hormonal imbalance, and secondary amenorrhoea.
When Yaz is preferred
Yaz is approved for contraception in adult women requesting an oral contraceptive, treatment of premenstrual dysphoric disorder (PMDD), and treatment of moderate acne in women aged ≥14 who are also requesting contraception.
Frequently asked questions
Is Aygestin or Yaz better? ▾
Aygestin and Yaz 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 Aygestin to Yaz? ▾
Switching between Aygestin and Yaz 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 Aygestin and Yaz 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 Aygestin comparisons
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.