Cabergoline for OHSS prevention

Cabergoline is a tablet used in IVF to lower the risk of ovarian hyperstimulation syndrome (OHSS) in people who are likely to overrespond to stimulation. It belongs to a group of medicines called dopamine agonists.

Who it is for

It is not part of every cycle. Clinics reach for it when the response to stimulation is strong: many follicles, a high estrogen level, or a high AMH or antral follicle count, which are the same features that raise OHSS risk. It is one of several tools a clinic uses together with choices like an agonist trigger or a freeze-all cycle.

How it works

OHSS happens when a substance called VEGF makes blood vessels leaky, so fluid shifts out of the bloodstream into the abdomen. Cabergoline dampens that VEGF effect, reducing the vessel leakiness without interfering with the developing follicles or the embryo. In practice it is usually started around the day of the trigger shot and taken for about a week.

What the evidence shows

Randomised trials and Cochrane reviews find that dopamine agonists such as cabergoline reduce the rate of moderate to severe OHSS in high-risk patients, roughly from about a quarter of such cycles down to around one in ten, and they do so without lowering pregnancy or live-birth rates. The best dose is still being refined, but the protective effect is well supported.

Side effects

Most side effects are mild and settle quickly: nausea, dizziness, a headache, or feeling tired. Taking it with food or at bedtime helps. The very high, long-term doses linked to rare heart-valve concerns are used for other conditions, not the short low-dose course given for OHSS prevention. Cabergoline is inexpensive and widely stocked in India under several brand names, so match the box to your prescription. If your clinic recommends it alongside a freeze-all decision, that is a coherent safety plan for a strong responder, not a sign something has gone wrong.

Does cabergoline mean I definitely will not get OHSS?▾

No. It meaningfully lowers the risk of moderate to severe OHSS, but does not eliminate it. Keep watching for warning signs such as rapidly worsening bloating, severe pain, breathlessness, or passing little urine, and contact your clinic if they appear.

Will it reduce my chance of pregnancy?▾

The evidence says no. Trials show cabergoline reduces OHSS without lowering pregnancy or live-birth rates, which is why clinics use it in high-risk cycles rather than resorting only to cancelling the cycle.

How long do I take it?▾

Usually about a week, often starting around the day of the trigger shot. Follow your clinic's exact instructions on dose and duration.