A San Jose woman was arrested this week on suspicion of DUI and drug possession after Sonoma County sheriff’s deputies noticed she was driving erratically in southeast Santa Rosa, officials said Wednesday.

Deputies stopped Davynna Nicholls, 21, after she committed a traffic violation on southbound Santa Rosa Avenue. The Sheriff’s Office reported on its Facebook page that Nicholls was evaluated and found to be under the influence of both alcohol and marijuana.

Deputies searched her car and found several baggies of a white powder thought to be ketamine, along with blotter paper that may have been acid. Nicholls was arrested on suspicion of DUI and two misdemeanor counts of drug possession.

She was taken to Sonoma County Jail.

You can reach Staff Writer Martin Espinoza at 707-521-5213 or martin.espinoza@pressdemocrat.com. On Twitter @renofish.