Anti-social Personality Disorder/Psychopathy
Cersei’s problems aren’t as straightforward as everyone else, according to Dr. Honda. As a female with a high position in a highly patriarchal society, it skews things a bit. She was marginalized and abused by her father and husband, is actively engaged in an incestuous relationship with her brother and her kid’s a dick. But at the same time, she’s in a context that values power, so her psychopathic behaviour might be more about adapting to the culture, than about her personality. Every deviant thing that she does is about gaining power and is an act of survival.
He does suspect though that she has an alcohol dependence, but it doesn’t seem to affect her in any way, so it’s hard to diagnose her as a functional alcoholic, as she probably drink to cope with her life.