Final answer:
Heroin is a fast-acting opioid with withdrawal symptoms peaking within 1-3 days and lasting for 5-7 days. Chronic withdrawal symptoms can last for weeks or months.
Step-by-step explanation:
Heroin is a fast-acting opioid, so the withdrawal symptoms usually peak within 1-3 days and gradually subside over a period of 5-7 days. Chronic withdrawal symptoms can last for weeks or months.