The Food Interactions with Drugs Evidence Ontology (FIDEO) represents Food-Drug Interactions and underlying interaction mechanisms described in scientific publications, drug and adverse effects databases, and drug interactions compendia. The ontology builds on previous efforts from the FoodOn, DRON, ChEBI, IAO, RO, BFO and DIDEO ontologies as well as the Hedrine and DrugBank resources. This ontology is maintained at https://gitub.u-bordeaux.fr/erias/fideo and requests for changes or additions should be filed at the issue tracker there.