Drug abuse means self-administration of any drugs for non therapeutic purpose almost always for altering consciousness. In other words, it is the bad use or excessive use without the prescription of a doctor.
Three types of drug abuse are-
1. Physician originated.
2. Patient originated.
3. Adolescent originated.
This type of drug abuse may result when a doctor is reluctant about the dose and dosing frequency of psycho-active drugs or drugs with addictive potential. It is rarely common in the 1st world countries because of the control of pharmacist in drug dispensing. It contributes about 5% of the drug abuse.
This type of drug abuse is relatively uncommon in the 1st countries where pharmacist control is present. But some patients may visit several physicians to obtain a number of prescriptions for psycho-active drugs or drugs with addictive potential, i.e., barbiturates, tranquillizers, stimulants and narcotics & collect the drugs from different retail pharmacy. In some patient originated abuse, psychological compulsiveness is the main reason of taking drugs with addictive potentials.
Mental pressure, depression, heroism, mass media advertising, affluence are the factors more frequently reported for drug abuse by adolescent. In this drug abuse, alcoholic beverages, cigarettes, marijuana, hashish, pethidine, morphine & heroin are frequently used. In some cases experimental intake of medicine which is prescribed for the family members also cause adolescent drug abuse.