Which drug is known to suppress growth hormone levels?

Bromocriptine is a dopamine agonist that has been shown to effectively suppress growth hormone levels, particularly in conditions such as acromegaly, where excess growth hormone is produced. By stimulating the dopamine receptors, bromocriptine not only inhibits the secretion of growth hormone from the pituitary gland but also helps to reduce associated symptoms. This pharmacological action makes it a valuable treatment option in managing hypersecretion of growth hormone.

The other drugs listed do not have a primary role in suppressing growth hormone levels. While antipsychotics like aripiprazole, haloperidol, and olanzapine may influence hormonal levels through different mechanisms, their main indications and actions are not focused on growth hormone suppression. In fact, some of these medications could potentially be associated with metabolic changes, making bromocriptine the most relevant choice for achieving the specific outcome of suppressing growth hormone levels.