However, some researchers have drawn distinctions between the concepts of antisocial personality disorder and psychopathy, with many researchers arguing that psychopathy is a disorder that overlaps with but is distinguishable from ASPD. Symptoms and behaviors
Addiction
ASPD is one of the personality disorders most likely to be associated with addiction. This is due to their tendency towards impulsive and reckless decision making, which puts them at risk of developing a substance abuse disorder, prepulse inhibition deficiency, misuse of oral administrations, drug overdoses, blood-borne diseases, shorter periods of abstinence, drug use at earlier ages, aggressive behavior, impulsivity, frequent illegal drug use, drug injections, and difficult interpersonal relationships. Substance abuse problems are far more common amongst people with ASPD who live in rural environments rather than urban ones. There are also gender differences between men and women in regard to substance abuse. Men who abuse substances are far more likely to have ASPD than women, who are more likely to have a mood disorder. The relationship between substance abuse and ASPD can be affected by other personality disorders. For example, one of the previously mentioned studies found that 27.6% of participants who had ASPD and alcohol abuse had more than one personality disorder. Heroin, methamphetamine, opiates, alcohol, nicotine, cannabis, polydrugs, cocaine, and crack cocaine are some prevalent drugs amongst people with ASPD. Alongside substance abuse, patients with ASPD are more likely to develop a gambling addiction. Impulsivity
Antisocial personality disorder has been associated with higher levels of impulsivity, suicidality,  and irresponsible behavior.
Twin studies, which are designed to discern between genetic and environmental effects, have reported significant genetic influences on antisocial behavior and conduct disorder.In the specific genes that may be involved, one gene that has seen particular interest in its correlation with antisocial behavior is the gene that encodes for monoamine oxidase A (MAO-A), an enzyme that breaks down monoamine neurotransmitters such as serotonin and norepinephrine. Various studies examining the genes relationship to behavior have suggested that variants of the gene that results in less MAO-A being produced, such as the 2R and 3R alleles of the promoter region, have associations with aggressive behavior in men. The association is also influenced by negative experience in early life, with children possessing a low-activity variant (MAOA-L) who experience such maltreatment being more likely to develop antisocial behavior than those with the high-activity variant (MAOA-H). Even when environmental interactions (e.g. emotional abuse) are controlled for, a small association between MAOA-L and aggressive and antisocial behavior remains.The gene that encodes for the serotonin transporter (SCL6A4), a gene that is heavily researched for its associations with other mental disorders, is another gene of interest in antisocial behavior and personality traits. Genetic associations studies have suggested that the short "S" allele is associated with impulsive antisocial behavior and ASPD in the inmate population. However, research into psychopathy find that the long "L" allele is associated with the Factor 1 traits of psychopathy, which describes its core affective (e.g. lack of empathy, fearlessness) and interpersonal (e.g. grandiosity, manipulativeness) personality disturbances.