Complex sentence: Though not an opiate itself, kratom is thought to behave similarly to a μ-opioid receptor agonist like morphine, and thus is used for managing chronic pain as well as recreationally.
Split into simpler sentences: Though not an opiate itself, kratom is thought to behave similarly to a μ-opioid receptor agonist like morphine. Some people used for managing chronic pain as well as recreationally.