a relevant question is whether blocking the PRLR by SMI-6 would cause undesirable side effects in treated BC patients. We think not. Indeed, cabergoline, a potent suppressor of pituitary PRL release, has been chronically prescribed to thousands of patients with hyperprolactinemia with minimal ill effects [
47]. On the contrary,
all known adverse effects of PRL result from its overproduction, which can cause infertility in women, impotence in men, and aggravation of autoimmune diseases [
4].
The only potential caveat is that women with BC who have an infant, will not produce breast milk while treated with a PRLR-blocking drug. However, breast feeding in patients with BC is clearly not a recommended practice.