A new study has found a possible link between long-term use of the mini-pill and a rare brain tumour called meningioma.
The mini-pill contains the hormone progesterone. It is commonly prescribed to women who cannot take oestrogen. Millions use it safely every year.
Researchers found that women who took a progesterone-only pill containing desogestrel for more than five years had a slightly higher risk of developing a meningioma. These tumours grow in the lining of the brain. Most are not cancerous, but they can still cause problems as they grow.
Symptoms may include ongoing headaches, nausea, vision changes, memory issues, seizures, or unusual drowsiness. Some cases require surgery to relieve pressure on the brain.
Experts stress that the overall risk is very small. The study estimated that only one in 67,000 long-term users would develop a tumour serious enough to need surgery. The increased risk was seen only after five continuous years of use. It appeared to disappear within a year of stopping the pill.
Doctors advise women not to stop taking their contraception suddenly. Anyone concerned should speak to their GP to review personal risk and discuss alternatives.
The key message is reassurance: the risk is rare, but awareness of symptoms and regular medical advice remain important.