Diazepam Intensol concentrate is used for treating anxiety disorders or for the short-term relief of the symptoms of anxiety. It is also used to relieve certain types of muscle spasms and to treat symptoms of alcohol withdrawal (eg, agitation, tremor, hallucinations). Diazepam Intensol concentrate is also used with other medicines to treat certain types of seizure disorders. It may also be used for other conditions as determined by your doctor. Diazepam Intensol concentrate is a benzodiazepine. It works by increasing the action of a certain chemical (gamma-aminobutyric acid [GABA]) in the brain and nervous system. This helps to reduce anxiety. It also helps to reduce seizure activity in the brain and to reduce muscle spasms.