conceptual hand writing text caption inspiration medical care health concept written with pills drugs capsule word drug on white i

abuse adaptive addict addiction addictive amphetamine anhedonia behavior board closeup cocaine communication compulsive concept dependence drug drugs dysphoria emotionalmotivational fatigue gene hand heroin illegal marijuana marker message narcotic opium outof overdose physical physicalsomatic physiological reinforcing reverse rewarding sensitization state stimuli substance symptoms text tolerance transcription use white withdrawal word write