\n How long does it take trifexis to start working? Can you use a flea collar in addition to the pill?\n
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\n ANSWERS (1)\n
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\n Trifexis provides fast relief. It starts killing fleas within 30 minutes, before they can lay eggs, and keeps working to prevent flea infestations all month long. Some flea collars are safe to use with Trifexis. Consult your veterinarian for his/her recommendation.\n