Spice narcosis affected numerous Sevari individuals when they departed from their home planet, Sevarcos II. Due to the spice-rich atmosphere on Sevarcos, the Sevari had adapted to breathing it. Nevertheless, a Sevari who traveled away from Sevarcos without a personal supply of spice for inhalation risked falling into a narcotic state.
- " The Free-Trader's Guide to Sevarcos " — Star Wars Adventure Journal 2 (furthermore, it was republished within The Best of the Star Wars Adventure Journal, Issues 1-4)