Yes, it is possible for an individual to exhibit narcissistic personality traits as a result of substance abuse, and these traits may appear to subside or become less prominent when they are sober. Substance abuse can significantly impact an individual's behavior, emotions, and personality, and it can exacerbate pre-existing personality traits, including narcissistic tendencies.
Substance abuse, such as alcohol or drugs, can lead to changes in brain chemistry and functioning, affecting judgment, impulse control, and emotional regulation. This can cause individuals to engage in reckless, self-centered, and manipulative behaviors characteristic of narcissism. While under the influence of substances, they may display more overt narcissistic traits, such as grandiosity, arrogance, and a lack of empathy.
However, when the person is sober, the effects of the substances wear off, and their brain chemistry returns to a more stable state. As a result, their personality and behavior might shift back toward their baseline, and some of the overt narcissistic traits might not be as prominent. They may appear more "normal" in their interactions and emotional responses.
It's important to note that substance abuse is a complex issue, and it can interact with underlying personality traits or disorders in various ways. For some individuals, substance abuse might mask pre-existing narcissistic traits, making it challenging to identify the root cause of their behavior.
Substance abuse and personality disorders, such as Narcissistic Personality Disorder (NPD), can co-occur, creating a complicated situation that requires professional assessment and treatment. Substance abuse treatment, therapy, and support can help individuals address both the substance use and any underlying personality issues they may be facing.