Parsing inflected forms may not always work as expected. If the following does not give the correct word, try Latin Words or Perseus.
prae-mĕdĭcātus, a, um, Part. [medico], protected by medicines or charms (poet., and eccl. Lat.): Aesonides, Ov. H. 12, 15: antidoto praemedicatus, Tert. Jejun. 12.