There's a lot of ways people act and react on opiates....some like emma stated, some people get a lot of energy, some people get sedated, usually always more friendly and talkative....as still said though, the whole lying/deceit thing seems to go along with drug use and addiction in general, not so much just opiates. How do you act on Meth? Maybe someone else acts differently, you can't uncover their DOC by the way they act all the time. Are you here because you are an addict, or because you're concerned about your addict friend?