efecto secundario

== Spanish == === Etymology === Literally, “secondary effect”. === Pronunciation === IPA(key): /eˌfeɡto sekunˈdaɾjo/ [eˌfeɣ̞.t̪o se.kũn̪ˈd̪a.ɾjo] Syllabification: e‧fec‧to se‧cun‧da‧rio === Noun === efecto secundario m (plural efectos secundarios) side effect (medicine) side effect knock-on effect === Further reading === “efecto secundario”, in Diccionario de la lengua española [Dictionary of the Spanish Language] (in Spanish), online version 23.8.1, Royal Spanish Academy [Spanish: Real Academia Española], 15 December 2025