Dopamine agonists such as bromocriptine (brand name Parlodel) and cabergoline (brand name Dostinex) inhibit GH release from the tumor. They work by stimulating natural receptorsof the hormone dopamine on the surface of the tumor. This sends messages into the tumor cells to stop producing GH.
Drugs (for example, lisuride, bromocriptine, cabergoline, pergolide, and ropinirole) that stimulate dopamine receptors directly. They are often used in conjunction with levodopa to supplement its effect. They have a number of known side-effects, including nausea, vomiting, and sometimes severe psychiatric reactions – including hallucinations