Complex sentence: The term claims a perceived general distrust of drug use for purposes of restoring or attaining pleasure or happiness; that the only legitimate use of drugs is for the purpose of curing or treating illness and disease.
Split into simpler sentences: The term claims a perceived general distrust of drug use for purposes of restoring or attaining pleasure or happiness. According to this view, the only legitimate use of drugs is for the purpose of curing or treating illness and disease.