Heroin is a drug well-known because of its powerful pain killer effect and its euphoric qualities. It is commonly used as an effective escapist drug. Between its numerous effects is possible to highlight the sense of wellbeing and calm, feeling of warmth and content. Drowsy and untroubled. Feeling of pleasure with the absence of worry, anxiety, or pain. High doses produce heavily sedated, be sleepy, unable to talk and appear to fall asleep.