What Happens If You Mix Alcohol With Valium?

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Alcohol and Valium can be a dangerous combination, even when consumed in low doses, according to WebMD. Alcohol and Valium interact by allowing more of the Valium to reach the brain. This leads to increased effects, including a decrease in mental and motor function; drowsiness, depressing, slowed or labored breathing; confusion and loss of coordination. More serious consequences include overdose and death, according to Axis Residential Treatment.