What do people act like when they're on meth?

Tweaked. " methers" often refer to the effects of methamphetamine as " tweaking". While on meth, people appear hyperactive, tend to talk a lot, have dialated puplis, sweating, and may be paranoid. Sometimes they have tactile hallcinations such as feeling like bugs are crawling on their skin leading to scratching and sores on skin. Appetite is suppressed such that they may appear anorexic. Acne is common.