Valium: Diazepam Oral Tablets VALIUM is a brand name for Diazepam oral table, available in oral and gel form; it is used to treat alcohol withdrawal, muscle spasm, anxiety, and seizures. Buy Valium Online . Dangerous Side – Effects The drug comes with a black box warning, meaning effects that may be dangerous, which may include difficulty in breathing, drowsiness, and death in extreme cases. This drug may slow down brain functioning due to which it is not advisable not to drive, operate machinery, or carry other tasks that require alertness. Sudden stopping of the drug may cause seizures. More common side effects may include tremor, dizziness, weakness of muscles, drowsiness, headache, dry mouth or excess saliva, nausea, and constipation. It may also cause blurred vision, slow down of speech, suicidal thoughts, or memory loss. In case there's any reaction in the liver, it may re...