| (subclass Depressant BiologicallyActiveSubstance) | Mid-level-ontology.kif 9337-9337 | Depressant is a subclass of biologically active substance |
| (subclass Ethanol Depressant) | Mid-level-ontology.kif 8637-8637 | Ethanol is a subclass of depressant |
| (subclass Opium Depressant) | Mid-level-ontology.kif 9346-9346 | Opium is a subclass of depressant |
| (subclass AlcoholicBeverage Depressant) | Mid-level-ontology.kif 10905-10905 | Alcoholic beverage is a subclass of depressant |
| (subclass Benzodiazepine Depressant) | Medicine.kif 3867-3867 | Benzodiazepine is a subclass of depressant |
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