Action News has learned the deputy is "alert and responsive."
It all started at Linnel Camp in Farmersville on Monday, where deputies checked on the well-being of a woman who had contacted them.
They discovered the woman had an outstanding warrant for her arrest.
Deputies searched the woman and came across a white substance.
After finding it, one deputy started feeling sick and was taken to the hospital with symptoms of possible fentanyl exposure.
Deputies arrested the woman for possession of a controlled substance.