I also mentioned dependence. I experienced no addiction to Soma after several weeks, and no withdrawals such as seizures after quitting. I experienced dependence, and I developed insomnia for about a week after stopping the Soma. Dependence lies on a spectrum somewhere between habit and addiction.
"I absorb energy like a sponge everywhere I go. It allows me to see the world and my purpose in it." Zak Bagans, Ghost Adventures (INFJ)