Drugs are any substances or chemicals which whwhen taken into the body either through nasal, oral, transdermal or intravenous way have psychological, emotional and behavioral effects on a person.
Drug dependence is a cluster of physiological, behavioral and cognitive phenomena of variable intensity in which the ues of drug takes on a high priority thereby creating a strong desire to take the substance.
Drug misuse is the use of substance incoherent or inconsistent with the prescribed dosage or frequency of use.
Drug tolerance is the condition of the body to adapt to the effects of substance to the body thus requiring an even larger amount of the substance to experience the same physiological and mental effect experienced when taking the smaller dosage.
Drugs of abuse are drugs commonly abused by users. Three drugs of abuse are shabu, marijuana and inhalants.