Kratom exhibits opioid-like properties, leading to dependency and withdrawal symptoms similar to opioids. Studies indicate that regular kratom users experience withdrawal symptoms including muscle aches, insomnia, irritability, and aggression. 

Settle AG, Yang C. A Case of Severe Kratom Addiction Contributing to a Suicide Attempt. Cureus. 2022 Sep 28;14(9):e29698. doi: 10.7759/cureus.29698. PMID: 36321032; PMCID: PMC9616552.