I struggled with this issue on Zyprexa and Abilify didn't seem to do much regarding prolactin levels.
Pseudoephedrine is a stimulant used as a decongestant in cold medicines often combined with Ibuprofen or Acetaminophen. It weakly crosses the blood brain barrier so it doesn't have stimulant qualities when used at low dosages. It does not directly affect any dopamine receptors (like Adderall or Ritalin) it only release norepinephrine so the risk of psychotic episodes while being simultaneously on antipsychothics that decrease its action is pretty small. I never got an episode by using normal dosages. My breasts are normal now. 

I'm going to post this study, to prove its effectiveness, you should talk to your doctor about it before trying on your own and you shouldn't take high dosages because it's a vasoconstrictor so it mess with your heart but low doses are safe. 

"A single dose of pseudoephedrine significantly reduced milk production. This effect was not attributable to changes in blood flow, but depression of prolactin secretion may be a contributing factor. At the maximum recommended pseudoephedrine doses, the calculated infant dose delivered via milk was &lt; 10% of the maternal dose, and is unlikely to affect the infant adversely. The ability of pseudoephedrine to suppress lactation suggests a novel use for the drug."

"However, the mean milk volume was reduced by 24% from 784 ml day−1 in the placebo period to 623 ml day−1 in the pseudoephedrine period (difference between means 161 ml day−1 (95% CI: 63, 259 ml day−1); t = 3.9, P = 0.006)." 

Source: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC1884328/