The behavior you may be referring to is commonly known as "heroin nod" or "nodding off." Heroin is an opioid drug that affects the central nervous system, causing a range of physical and psychological effects. When individuals use heroin, it can lead to a feeling of euphoria and relaxation, but it also causes sedation and drowsiness.
The reason heroin addicts may appear to frown or nod off is due to the drug's ability to depress the central nervous system. The sedative effects of heroin can lead to a decrease in muscle tone and coordination, resulting in a drooping of the head and facial muscles. This effect is especially pronounced when heroin is taken in higher doses or when the drug is mixed with other substances, such as alcohol or benzodiazepines.
It's important to note that heroin use is highly dangerous and addictive. Prolonged use can lead to severe health consequences, including overdose and death. Heroin addiction is a serious medical condition that requires professional help and support for treatment and recovery. If you or someone you know is struggling with substance abuse, it's crucial to seek assistance from healthcare professionals or addiction support organizations.