preventatives
pre-ven-ta-tives
noun
Measures or substances used to stop something undesirable, like illness, from occurring.
"Regular exercise and a good diet are excellent preventatives."
Thesaurus
Synonyms: pre-emptive, obstructive, preemptive, hindering, preventive, frustrative, clogging, prohibitory, impeding, preclusive, deterrent, blockading
Antonyms: permissive