Understanding Microgynon
Microgynon 30 is a widely prescribed combined oral contraceptive pill [1.2.2]. Its primary function is to prevent pregnancy. Like other combined pills, it contains synthetic versions of two female hormones: estrogen (as ethinylestradiol) and progestogen (as levonorgestrel) [1.3.1]. Each standard Microgynon 30 pill contains 30 micrograms (mcg) of ethinylestradiol and 150mcg of levonorgestrel [1.2.1, 1.3.2]. These hormones work together to prevent pregnancy in a highly effective manner when taken correctly [1.3.1].
What Pill is the Same as Microgynon? The Direct Equivalents
Several other contraceptive pills are medically identical to Microgynon 30. This means they contain the exact same active ingredients in the same dosages and work in the body in the same way [1.4.1]. The most common equivalents include:
- Rigevidon: Often considered the generic version of Microgynon, it is medically interchangeable [1.4.1].
- Levest: This is another pill that is identical in hormonal composition to Microgynon and Rigevidon [1.2.3, 1.5.1].
- Ovranette: This brand also contains 150mcg of levonorgestrel and 30mcg of ethinylestradiol, making it another direct equivalent [1.3.2, 1.3.3].
When a pharmacist or doctor switches you from Microgynon to one of these brands, it is because they are considered bioequivalent. The primary difference is often the manufacturer and the cost, with generic versions typically being less expensive than the branded original [1.4.1, 1.4.2].
Brand vs. Generic: Is There a Difference?
While the active ingredients in Microgynon and its generics like Rigevidon are identical, the non-active ingredients can differ [1.5.1]. These are the fillers, binders, and colorings that make up the rest of the tablet. For the vast majority of users, this difference has no clinical effect. The pills work in precisely the same way to prevent pregnancy [1.4.4]. However, in very rare cases, an individual might have a sensitivity to one of the non-active ingredients, but this is uncommon.
Comparison of Microgynon and its Equivalents
| Feature | Microgynon 30 | Rigevidon | Levest |
|---|---|---|---|
| Active Ingredients | 150mcg Levonorgestrel & 30mcg Ethinylestradiol [1.3.2] | 150mcg Levonorgestrel & 30mcg Ethinylestradiol [1.2.1] | 150mcg Levonorgestrel & 30mcg Ethinylestradiol [1.2.3] |
| Type | Combined Oral Contraceptive | Combined Oral Contraceptive | Combined Oral Contraceptive |
| Use | 21 days on, 7 days off | 21 days on, 7 days off | 21 days on, 7 days off |
| Medical Equivalence | Branded Original | Medically Identical Generic [1.4.1] | Medically Identical Generic [1.5.2] |
How Do These Combined Pills Work?
Microgynon and its equivalents prevent pregnancy through a three-pronged approach [1.2.1, 1.7.2]:
- Preventing Ovulation: The primary mechanism is stopping the ovaries from releasing an egg each month.
- Thickening Cervical Mucus: The hormones make the mucus at the cervix (the neck of the womb) thicker, which makes it difficult for sperm to travel and reach an egg.
- Thinning the Womb Lining: The hormones prevent the lining of the uterus from thickening, making it less likely that a fertilized egg could implant and grow.
Potential Side Effects and Risks
As with any medication, there can be side effects. Most are mild and tend to resolve within the first few months as your body adjusts [1.2.1]. Common side effects include:
- Headaches [1.8.3]
- Nausea [1.8.3]
- Breast tenderness [1.8.3]
- Mood changes [1.2.1]
- Breakthrough bleeding or spotting [1.8.1]
More serious but rare risks are associated with combined hormonal contraception, most notably an increased risk of blood clots (venous thromboembolism or VTE), heart attack, and stroke [1.8.1]. This risk is higher for individuals with certain health factors, such as being a smoker over the age of 35, having a high BMI, or a personal or family history of blood clots [1.2.1, 1.8.1].
How to Take the Pill and What to Do if You Miss One
These pills are typically taken once a day for 21 consecutive days, followed by a 7-day pill-free break, during which a withdrawal bleed (similar to a period) usually occurs [1.2.1].
- If you miss one pill: Take it as soon as you remember, even if it means taking two pills in one day. You are still protected against pregnancy [1.10.2].
- If you miss two or more pills: Take the most recently missed pill as soon as possible and continue with the rest of the pack. You will need to use a backup method of contraception, like condoms, for the next seven days. If you've had unprotected sex in the days prior, you may need to consider emergency contraception [1.10.2, 1.10.4].
Conclusion
Pills such as Rigevidon, Levest, and Ovranette are medically the same as Microgynon 30 [1.4.5]. They contain the same hormones in the same doses and offer the same level of contraceptive protection [1.4.1]. The main difference lies in the branding, manufacturer, and often the cost [1.4.1]. If you are considering starting or switching contraceptive pills, it is essential to consult with a doctor or pharmacist. They can provide personalized advice based on your medical history and help you decide which medication is the most suitable and safe option for you.
For more comprehensive information on contraception options, you can visit the NHS website.
