Final answer:
Heroin withdrawal does not typically involve pinpoint pupils. Withdrawal symptoms usually present as the opposite effects of the drug's use, and during heroin withdrawal, individuals may actually experience pupil dilation rather than constriction. Methadone is used in treatment to reduce cravings and withdrawal symptoms.
Step-by-step explanation:
Heroin withdrawal does not typically involve pinpoint pupils (miosis). During opioid intoxication, individuals often experience pinpoint pupils due to the drug's effect on the central nervous system. However, during withdrawal, the opposite occurs, and pupils may actually dilate. Withdrawal symptoms are usually the reverse of the effects experienced during drug use. Common heroin withdrawal symptoms include abdominal pain, piloerection (goosebumps), muscle twitching, and dysphoria (a state of unease or dissatisfaction).
Methadone is a psychoactive drug that may be prescribed to a person with heroin addiction because it can diminish cravings and withdrawal symptoms without producing the same high as heroin, facilitating the process of recovery.