Most frequent side effects are nausea, orthostatic hypotension, headaches, and vomiting through stimulation of the brainstem vomiting centre. Vasospasms with serious consequences such as myocardial infarction and stroke that have been reported in connection with the puerperium, appear to be extremely rare events. Peripheral vasospasm (of the fingers or toes) can cause Raynaud's Phenomenon.
Bromocriptine use has been anecdotally associated with causing or worsening psychotic symptoms (its mechanism is in opposition of most antipsychotics, whose mechanisms generally block dopamine receptors).Pulmonary fibrosis has been reported when bromocriptine was used in high doses for the treatment of Parkinson's disease.
Use to suppress milk production after childbirth was reviewed in 2014 and it was concluded that in this context a causal association with serious cardiovascular, neurological or psychiatric events could not be excluded with an overall incidence rate estimated to range between 0.005% and 0.04%. Additional safety precautions and stricter prescribing rules were suggested based on the data. It is a bile salt export pump inhibitor.
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^National Institute ofMental Health. PDSD Ki Database (Internet) [cited 2013 Jul 24]. ChapelHill (NC): University of North Carolina. 1998-2013. Available from: "Archived copy". Archived from the original on 2013-11-08. Retrieved 2013-11-26.CS1 maint: archived copy as title (link)