Benari doesn’t want to remain an outlier, though. And perhaps surprisingly, many doctors and surgeons are starting to agree that surgery should be considered more than a last-resort remedy for weight loss. Instead, it should be seen as a crucial aspect of diabetes care, and quite possibly the best tool we have against the chronic, often worsening condition.
That call went unheeded, however, as preventative has managed to survive as a variant, albeit a much less popular one. A search on the Corpus of Contemporary American English finds preventive beating preventative by a ratio of about 6 to 1 in current written usage, across both academic and nonacademic texts. You can still get away with using preventative in standard English, but that extraneous syllable won't gain you anything, other than disdain from the sticklers.