Drug use of any kind eventually becomes isolative and self centered.
British Dictionary definitions for isolative
isolative
/ˈaɪsəˌleɪtɪv; ˈaɪsələtɪv/
adjective
1.
(of a sound change) occurring in all linguistic environments, as the change of Middle English / iː / to Modern English / aɪ /, as in timeCompare combinative (sense 2)