| (subclass Depressant BiologicallyActiveSubstance) | Mid-level-ontology.kif 9338-9338 | |
| (subclass Ethanol Depressant) | Mid-level-ontology.kif 8638-8638 | |
| (subclass Opium Depressant) | Mid-level-ontology.kif 9347-9347 | |
| (subclass AlcoholicBeverage Depressant) | Mid-level-ontology.kif 10906-10906 | |
| (subclass Benzodiazepine Depressant) | Medicine.kif 3867-3867 |
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