Cabergoline

Key points

• Its extended action in the body allows dosing just once or twice weekly, unlike older options that need daily use.
• It treats hyperprolactinaemia, which can disrupt periods, fertility and libido, as well as prolactinoma, a prolactin-secreting pituitary tumour it can shrink.
• Long-term use calls for monitoring of heart valve changes, and it is unsuitable for people with existing valve problems or uncontrolled hypertension.

What is Cabergoline?

Cabergoline is a dopamine receptor agonist, meaning it mimics the action of dopamine, a natural chemical in the brain. By stimulating dopamine receptors on the pituitary gland, it tells the body to reduce prolactin production. This makes it an effective treatment for conditions caused by excess prolactin, a state known as hyperprolactinaemia. Its long duration of action allows for dosing once or twice a week, which many patients find more convenient than older alternatives.

What Cabergoline is Used For

Cabergoline is primarily used to treat Hyperprolactinaemia, a condition where the body produces too much prolactin. Elevated prolactin can cause irregular periods, unexpected milk production and fertility difficulties in women, as well as reduced libido and erectile difficulties in men. It is also prescribed for Prolactinoma, a benign tumour of the pituitary gland that secretes prolactin. By shrinking the tumour and lowering prolactin levels, cabergoline addresses both the hormonal imbalance and the physical mass.

How Does Cabergoline Work?

Cabergoline binds to dopamine D2 receptors on lactotroph cells in the anterior pituitary gland. This binding signals those cells to slow down prolactin synthesis and release. For you, this means prolactin levels drop, which can restore normal menstrual cycles, improve fertility and reduce tumour size in prolactinomas. The effect is sustained because cabergoline stays bound to the receptor for a long time, giving it a half-life of around 63 to 69 hours.

Cabergoline Brands and Forms

Cabergoline is available as a tablet, taken by mouth. The listed option is Dostinex, the originator brand. Tablets are the standard form for this medication, offering precise dosing and ease of use. When choosing a treatment, patients often consider the balance between the well-known originator brand and the availability of generic alternatives. Cabergoline falls within the broader area of Women’s Health, where managing prolactin levels is a common therapeutic goal.

Safety Overview for Cabergoline

What to Check Before Using This Medicine

Before starting cabergoline, your doctor will typically assess your prolactin levels and may perform imaging of the pituitary gland. Inform your healthcare provider about any history of heart valve problems, uncontrolled high blood pressure or liver disease. Cabergoline is not suitable if you have certain fibrotic conditions or uncontrolled hypertension.

Possible Reactions and Tolerability

Common reactions include nausea, headache, dizziness and fatigue, especially when first starting treatment. These often lessen as your body adjusts. Less commonly, some people experience low blood pressure when standing, constipation or mood changes. Your doctor will monitor you for any signs of heart valve changes with long-term use.

Interactions and Health Factors

Cabergoline can interact with other dopamine-blocking medications, such as certain antipsychotics and anti-nausea drugs, which may reduce its effectiveness. Other medications that lower blood pressure may add to its effects. Always share your full medication list with your doctor before beginning treatment.

Product labelling and verified clinical sources remain the correct references for specific contraindications, interactions and reactions.

Further reading

• Cabergoline 0.5mg Tablets
• Cabergoline: MedlinePlus Drug Information