Self administration of a drug for non medical reasons in quantities and frequencies which may impair an individual’s ability to function effectively and which may result in social, physical or emotional harm is best named as:

Community medicine deals with with healthcare issues that affect the community as a whole. It is also known as social medicine, preventive medicine, public health or community health science.

Medical interventions that occur in communities can be classified as three categories: Primary care, Secondary care, and Tertiary care. 

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