Cabergoline
Dostinex, Cabaser
A long-acting dopamine agonist that strongly lowers prolactin. A prescription drug for hyperprolactinemia and prolactin-secreting pituitary tumors.
Legal status: Prescription medicine in most countries; not on the WADA Prohibited List.
What it gives
What people use it for and what the sources report. Strength is a general category from the literature: mild, clear or strong.
Purpose
Approved for hyperprolactinemia. In sport, used against high prolactin linked to 19-nor steroids (nandrolone, trenbolone): low libido, erection problems, nipple discharge. Prescription only, under a doctor with prolactin tests.
What people seek and what studies show
In a large trial in women with high prolactin it normalized levels in 83%, versus 59% on bromocriptine, with fewer side effects; in men with small prolactin-secreting tumors, 89% reached normal prolactin and testosterone. Evidence for better libido when prolactin is normal is thin: small, short studies, such as a single-dose study in ten healthy men. It has not been studied in steroid users.
Effects
Evidence: Approved medicine — studied in people for its medical use
Possible side effects
Possible does not mean certain: whether they appear depends on dose, duration, individual response and monitoring. Below — what to watch for and how to notice it early.
3 possible side effects
level · how often it is reportedWhat the levels mean
Level: general category from the literature, not your personal risk
How often
- common
- reported often
- possible
- reported in some people
- rare
- reported occasionally
How to lower the risks
For 3 of 3 possible side effects there are specific ways to lower the chance: everyday measures, supplements and options a doctor may consider. No measure removes a risk completely.
Good sleep, fewer stressors, tell someone close to you what to watch for.
How each option helps (2)
- Avoiding alcohol and other liver stressors — Alcohol and other drugs on top of steroids explain much of the link between steroid use and violence.
- Sleep hygiene — Enough sleep lowers irritability and improves impulse control.
Regular cardio, blood pressure control, an echo as a baseline and then yearly.
How each option helps (4)
- Heart screening: ECG and echocardiogram — Echocardiography shows wall thickening and reduced pumping early, while stopping AAS and treating BP can still help.
- Working with a doctor — Orders ECG and echocardiography and treats early heart changes.
- Home blood-pressure monitoring — Keeping BP controlled is one of the main ways to limit heart-wall thickening.
- Regular cardio training — Supports heart and vessel function, but does not reverse steroid-related heart thickening or weakening.
Low-level side effects
How each option helps (2)
- Working with a doctor — Assesses persistent vomiting or severe belly pain (possible pancreatitis or gallstones) and adjusts prescribed GLP-1 treatment when nausea persists.
- Pancreatin + dimeticone (Pankreoflat) — May ease heaviness and gas after meals; can cause nausea or diarrhea. Not for pork or cow's milk protein allergy (anaphylaxis reported) or early acute pancreatitis.
Check-ups and blood tests
Which tests and check-ups to do and when. This is a guide — agree the exact schedule with your doctor.
Which doctors can help
At home
- Home blood pressure: 2–3 times a week in the morning, keep a log
Get medical help at once if
- Chest pain or pressure, breathlessness on light effort, swollen ankles, fainting — seek urgent care.
- Losing control of anger, thoughts of harming yourself or others — stop and get help today.
In an emergency, call your local emergency number.
For women
Also used to stop breast-milk production and for prolactinomas in women; the same valve, fibrosis and impulse-control cautions apply.
Myth & fact
“More cabergoline means better libido.”
The goal is normal prolactin, not zero. Very low prolactin has been linked to poorer sexual function, and more cumulative exposure means more valve risk.
Combinations
No specific combination notes for this substance yet. The stack check still adds up side effects that several substances share.
Sources
Possible side effects by body system, combinations, how to lower the risks and which tests to do — free.
Open the stack check