The risk of relapse for people who have given up addictive drugs is elevated because of ____,which means that for some people,exposure to addictive drugs changes gene expression.

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Epigenetic effects refer to changes in gene expression that do not involve changes to the underlying DNA sequence. In the case of addiction, exposure to addictive drugs can lead to changes in gene expression that increase the risk of relapse even after the person has stopped using drugs. This can be due to changes in the way that genes related to reward, motivation, and stress response are expressed in response to drug use.

The Risk of Relapse for People Who Have Given Up