Final answer:
Chronic use of narcotics often leads to a decreased sex drive, with narcotics causing both addiction and dependence which have negative effects on sexual function.
Step-by-step explanation:
The chronic use of narcotics often results in a decreased sex drive. Narcotics, which can lead to drug addiction and drug dependence, have various side effects, including impacts on sexual function. Addiction is defined as the compulsive use of a substance, such as a psychoactive drug, despite the negative consequences that such use may entail. Drug dependence refers to a condition in which stopping the use of a substance can produce physical and/or psychological symptoms. Chronic opioid use, for example, is known to decrease libido as well as cause dysfunction in hormonal production that regulates sexual behavior.