Synonyms for In ones best interests:

• adj.

  •politic (adjective)
  • discreet,
  • on the lookout,
  • cool,
  • in one's best interests,
  • urbane,
  • canny,
  • adroit,
  • sensible,
  • tactical,
  • advisable,
  • delicate,
  • sagacious,
  • tuned in,
  • shrewd,
  • smooth,
  • expedient,
  • diplomatic,
  • sharp,
  • prudent,
  • perspicacious,
  • judicious.

Antonyms for In ones best interests:

• adj.

  • politic
    indiscreet, tactless, unwise, impolitic, injudicious.