Like every other state, Mississippi has a legal limit at which authorities would consider you impaired. When it comes to alcohol, the legal limit generally means a blood alcohol content of .08 percent or higher. However, an officer could place you under arrest on suspicion of DUI with a BAC lower than .08 depending on the circumstances.
You could also face charges for DUI for using drugs that impair your ability to drive, which includes prescription medications. The question that you and many other people ask is: what turns a traffic stop into an arrest for driving under the influence?