This is the class of drugs that is usually used to treat pituitary tumors like your husband has.
It's worth noting that dopamine is the brain chemical involved in infatuation - which explains why so many spouses having affairs, in the throes of infatuation, behave in similar irrational ways. But in your husband's case, it could be the dopamine-mimicking drug he's on causing the problem. Please call his doctor and have a chat. (Note: Due to strict confidentiality rules, his doctor may not be willing to tell YOU anything about your husband, but you can still relay the behavior changes you're seeing and your concern that it may be medication-related).
