Something else to add to the mix - steroids can make people very, very talkative, sometimes in a weird, aggressive way.

Unfortunately, sometimes the 'why' matters less than the behavior. I've had to stop seeing friends before because their behavior was unacceptable. Knowing that the behavior may stem from an underlying medical condition just makes me feel guiltier about ending the friendships. It doesn't make it any easier to deal with the way they treat me, even if they are apologetic.