<prompt> Mainlining is -Cocaine addictionHomicidal cut woundsDrug addicts using main veins for injecting drugsSuicidal cut wounds  <response>: Most persistent drug abusers follow a classic progression from sniffing similar to oral route to skin popping subcutaneous route, to mainlining intravenous route - each step bringing more intense experience, a higher addiction liability. With mainlining the initial thrill is more intense. 