Yaz and Yasmin contraceptive pills will be cheaper from March. How are they different from other pills?

The oral contraceptive pills Yaz and Yasmin will be listed on the Pharmaceutical Benefits Scheme (PBS) from March 1 2025, meaning Australian women will pay less for them.

This listing follows advice from the Australian Pharmaceutical Benefits Advisory Committee, which recommended adding these pills to the PBS so women who find other contraceptive pills unsuitable have more options. These contraceptives also help manage acne and some other hormone-related conditions.

So how do Yaz and Yasmin work? And how much will they cost once they’re on the PBS?

What makes Yaz and Yasmin different?

Oral contraceptive pills prevent pregnancy primarily by stopping ovulation – the release of an egg from the ovaries.

They also thicken mucus in the cervix, making it harder for sperm to reach an egg. And they thin the lining of the uterus, reducing the likelihood of implantation.

Most combination oral contraceptive pills contain an oestrogen-based hormone (typically ethinylestradiol) and a progestogen hormone.

Both Yaz and Yasmin contain ethinylestradiol and a synthetic progestogen, called drospirenone. They both contain 3 milligrams of drospirenone.

They differ from each other in the amount of ethinylestradiol they contain. Yaz has 20 micrograms and Yasmin has 30 micrograms of the hormone. They also differ in the number of active and placebo pills a pack contains. Yaz has 24 active pills and 4 placebo pills while Yasmin has 21 active pills and 7 placebos.

Both contraceptives are just as effective in preventing pregnancies as other oral contraceptives. The chance of getting pregnant while taking either medication is around 9%.

In deciding which one is most suitable, a doctor will consider how their patient has responded to hormone treatment in the past and any other hormone-related conditions they have.

Both Yaz and Yasmin have benefits beyond birth control. Drospirenone is thought to help reduce hormone-related acne and hirsutism (excessive facial hair growth).

Premenstrual dysphoric disorder (PMDD) is a severe form of premenstrual syndrome that causes intense mood swings, depression, anxiety, and irritability before menstruation. The hormonal stability provided by Yaz, with its short hormone-free interval, can help alleviate PMDD symptoms.

Things to look out for if taking them

All combined oral contraceptive pills have common side effects that women may experience, including nausea, vomiting, break-through bleeding, absent or missed periods, headaches, irritability and breast tenderness.

There are some additional risks for the Yaz and Yasmin products. The drospirenone in the contraceptives has been associated with a slightly higher risk of blood clots when compared with other progestogens. The risk is low but may be higher in women who smoke, are over 35, or have other risk factors for clots.

Drospirenone can also cause a build up of potassium in the blood. This is a particular risk for women with kidney problems, and for those who also take diuretics or blood pressure medications, which can also raise potassium levels.

Elevated potassium can cause symptoms such as muscle weakness, fatigue, dizziness and an irregular heart rhythm.

What’s changing? How much will they cost?

These approvals are the first contraceptive pills to be added to the PBS in 30 years and are part of a larger package of women’s health measures the government announced on the weekend.

The government will also provide incentives for doctors and nurses to bulk bill services for implanting long-term contraceptives such as IUDs (intrauterine devices).

Currently, pharmacies advertise three-months’ supply of Yaz and Yasmin for around A$79 dollars ($316 per year).

Come March, the price women will pay will drop to $31.60 per box, or $126.40 per year. Concession card holders will pay $7.70 per box, or $30.80 per year.

But the price of Yaz and Yasmin will still be higher than other combined oral contraceptives (containing the hormones levonorgestrel and ethinylestradiol) on the PBS, which start at $22 for a four-month supply or $66 per year.

How can you switch?

If you are considering Yaz or Yasmin, speak to your doctor. They will take your medical history and discuss your lifestyle and any other specific health needs.

They will also explain the potential side effects to watch out for and any precautions you may need to take.

If you proceed, your doctor will outline a process for transitioning to the new medication, including timing and where to start in the pill sequence.

Read more: What is premenstrual dysphoric disorder? And how is it different to PMS?