What is Dostinex? Have you ever felt a loss of libido or sexual desire? Is the thought of sex less interesting lately? Dostinex can renew your passions in a way Viagra and other drugs can't. What is Dostinex? Dostinex (Also known as Cabergoline / Cabaser) is a relatively new drug Dostinex was primarily invented for the purpose of lowering prolactin in patients with a pituitary tumors and other prolactin related conditions.