Yasmin
Is It Right for You?
A complete guide to Yasmin — what it treats, how it works, dosages, side effects, and when a clinician may prescribe it following an online consultation.
What Is Yasmin?
Yasmin is a combined oral contraceptive pill (COCP) containing two active ingredients: ethinylestradiol 30 micrograms (a synthetic oestrogen) and drospirenone 3 mg (a synthetic progestogen derived from spironolactone). It is taken daily in a 21-pill pack (active pills), followed by a 7-day pill-free interval during which a withdrawal bleed typically occurs.
Drospirenone, the progestogen component of Yasmin, has a distinct pharmacological profile that sets it apart from older progestogens. It has anti-androgenic properties — making Yasmin particularly useful for women who experience androgen-related symptoms such as acne, seborrhoea, and mild hirsutism alongside their contraception. It also has antimineralocorticoid properties, counteracting the fluid-retaining effects of oestrogen and reducing the bloating and water retention sometimes experienced with other combined pills.
Yasmin is a highly effective form of contraception when taken correctly (> 99% efficacy). It is taken once daily at approximately the same time each day during the 21 active days.
Yasmin is a prescription-only medication in the UK. A licensed clinician must assess your medical history, blood pressure, risk factors, and family history before it can be prescribed — which can now be done quickly and conveniently through a telehealth consultation.
What Conditions Is Yasmin Used For?
Yasmin is licensed for:
prevention of pregnancy in women of reproductive age.
(in women who also require oral contraception) — Yasmin is licensed for the treatment of moderate acne vulgaris in women who also desire oral contraception, due to drospirenone's anti-androgenic properties.
Yasmin provides highly effective contraception but offers no protection against sexually transmitted infections (STIs) including HIV, chlamydia, gonorrhoea, and herpes. Barrier methods such as condoms should be used in addition to Yasmin if STI protection is required.
How Does Yasmin Work?
Yasmin works through three complementary mechanisms:
Ovulation Suppression — Ethinylestradiol and drospirenone together suppress the hypothalamic-pituitary-ovarian axis. They inhibit the pulsatile release of GnRH from the hypothalamus and suppress the mid-cycle LH surge that triggers ovulation. Without ovulation, no egg is available for fertilisation — this is the primary mechanism of contraception.
Cervical Mucus Thickening — Drospirenone causes the cervical mucus to become thick, viscous, and hostile to sperm penetration, providing a secondary barrier to fertilisation even if ovulation were to occur.
Endometrial Changes — The combined hormonal effect alters the endometrial lining, making it less receptive to implantation of a fertilised egg — a tertiary mechanism.
Anti-androgenic Effects (Drospirenone) — Drospirenone competes with androgens at the androgen receptor and inhibits 5-alpha-reductase, reducing the effect of circulating androgens on sebaceous glands and hair follicles. This accounts for Yasmin's efficacy in reducing acne, seborrhoea, and mild hirsutism.
Antimineralocorticoid Effects (Drospirenone) — Drospirenone blocks aldosterone receptors, reducing sodium and water retention, which counteracts the fluid-retaining effect of oestrogen and reduces bloating.
Dosages & Administration
The correct dose depends on the type and severity of infection, age, weight, and kidney function. Always follow your clinician's instructions. The table below is for general reference only.
Administration Tips
Take at the same time every day — consistency is critical for maximum contraceptive efficacy. Even a delay of several hours does not significantly reduce efficacy, but missing pills or taking them erratically does.
Start on the first day of your period (Day 1 start) for immediate contraceptive protection, or on any day of your cycle with additional barrier contraception for 7 days.
The 7-day pill-free interval allows a withdrawal bleed, which is lighter and more regular than a natural period. You are still protected from pregnancy during this interval if you have taken all 21 pills correctly.
If you miss a pill: Take it as soon as you remember. If it is more than 12 hours late, use additional contraception (condoms) for the next 7 days. If pills are missed in week 1 or week 3, specific guidance applies — consult the patient information leaflet or your clinician.
Vomiting or severe diarrhoea within 4 hours of taking a pill means the pill may not have been absorbed — treat as a missed pill and use additional contraception.
Side Effects of Yasmin
Side effects vary between women. Many women experience no side effects; others experience initial effects that typically settle within the first 2 to 3 months.
- Nausea (particularly in the first cycle; take with food)
- Breast tenderness
- Headache
- Mood changes (low mood, mood swings — affect some women)
- Reduced libido
- Breakthrough bleeding or spotting (particularly in early cycles)
- Changes in vaginal discharge
- Contact lens intolerance (corneal changes)
- Mild blood pressure rise
- Venous thromboembolism (VTE) — deep vein thrombosis or pulmonary embolism; the most important serious risk of COCPs; risk is higher with drospirenone-containing pills than with levonorgestrel-containing pills
- Arterial events — myocardial infarction and stroke; risk is greatest in smokers, women over 35, hypertensive women, and those with migraine with aura
- Liver tumours — rare; benign hepatic adenoma has been associated with long-term COCP use
- Hypertension — oestrogen-containing pills can raise blood pressure; monitor regularly
- Hyperkalaemia — due to drospirenone's antimineralocorticoid effect, particularly with concurrent potassium-sparing drugs; rare at standard doses
All combined oral contraceptives carry an increased risk of blood clots (VTE) compared to non-users. The background risk for women of reproductive age not on the pill is approximately 2 per 10,000 women per year. With drospirenone-containing pills such as Yasmin, this rises to approximately 9–12 per 10,000 per year. This risk increases substantially if additional risk factors are present — obesity, immobility, a personal or close family history of VTE, or major surgery. Seek immediate medical attention if you develop calf pain, leg swelling, chest pain, or breathlessness.
Drug Interactions
Always disclose all medications and supplements to your clinician or pharmacist
Significantly accelerate the metabolism of ethinylestradiol and drospirenone, reducing contraceptive efficacy and increasing the risk of unintended pregnancy. A higher-dose pill, additional contraception, or a non-hormonal method may be required. Some enzyme inducers are contraindicated with Yasmin.
Drospirenone's antimineralocorticoid activity can raise serum potassium; concurrent use with drugs that also raise potassium requires serum potassium monitoring.
Although the interaction is now considered minimal based on current evidence, broad-spectrum antibiotics may theoretically affect gut flora and oestrogen enterohepatic recycling. Additional barrier precautions are no longer routinely recommended for most antibiotic courses, but this should be discussed with your clinician.
COCPs significantly reduce lamotrigine plasma levels, potentially compromising seizure control. Women with epilepsy on lamotrigine should use Yasmin with particular caution and in close consultation with their neurologist.
Important Warnings
You have a personal history of VTE, arterial thrombosis, stroke, or heart attack; you have migraine with aura; you are over 35 and smoke; you have uncontrolled hypertension; you have severe or active liver disease; you have a known clotting disorder (e.g. Factor V Leiden, antiphospholipid syndrome); you are pregnant or breastfeeding within 6 weeks of delivery.
Migraine with aura is an absolute contraindication to combined oestrogen-containing contraceptives due to significantly increased risk of ischaemic stroke. Women who develop new migraines with aura while taking Yasmin should stop immediately and seek medical review. A progestogen-only pill is a safer alternative.
Yasmin is contraindicated during pregnancy. If pregnancy is suspected, stop Yasmin and perform a pregnancy test. Yasmin is not recommended during breastfeeding as oestrogen can reduce milk production; a progestogen-only pill is preferred during lactation.
Smoking significantly amplifies the cardiovascular risks of combined oral contraceptives, particularly for arterial events. Women who smoke are strongly advised to stop smoking. COCPs are generally contraindicated in women over 35 who smoke. A progestogen-only pill or non-hormonal method may be more appropriate.
Speak to a Clinician About Treatment
Getting advice no longer means sitting in a waiting room. Through The GP Service, you can consult with a licensed clinician in minutes — from home, on your lunch break, or wherever works for you. If treatment is clinically appropriate, your clinician can issue a prescription during the consultation. A consultation does not guarantee a prescription.
The treatment you need, when you need it.
Yasmin FAQs
Yasmin is less likely to cause weight gain than pills containing progestogens with androgenic properties. Drospirenone's antimineralocorticoid action actually counteracts fluid retention caused by oestrogen, and some women report feeling less bloated on Yasmin than on other pills. There is no clinically significant direct effect on body fat.
Yes. Yasmin is licensed for the treatment of moderate acne in women who also require oral contraception. Its anti-androgenic effects reduce sebum production and improve androgen-sensitive skin conditions. Many women notice significant improvement in skin oiliness and acne within 3 to 6 cycles. It is not, however, the most potent hormonal acne treatment — co-cyprindiol (Dianette) contains a higher dose of anti-androgen and is used for more severe androgen-mediated acne.
If you start Yasmin on the first day of your period, you are immediately protected against pregnancy. If you start on any other day, you need to use additional barrier contraception (e.g. condoms) for the first 7 days. After 7 days of consistent pill-taking, Yasmin provides full contraceptive protection.
You can stop Yasmin at any point in your pill pack. Your natural menstrual cycle will typically return within 1 to 3 months. Fertility returns promptly after stopping — if you do not wish to become pregnant, start an alternative contraceptive method immediately or use barrier contraception.
Yasmin is distinguished by its progestogen component, drospirenone, which has anti-androgenic and antimineralocorticoid properties not shared by most other progestogens. This makes Yasmin particularly suitable for women who experience acne, oily skin, or bloating with other pills. However, drospirenone-containing pills carry a modestly higher VTE risk than pills containing older progestogens such as levonorgestrel. Your clinician will weigh these factors against your individual risk profile.