Benzodiazepines have a relatively low toxicity in overdose.Diazepam has a number of uses including:

Treatment of anxiety, panic attacks, and states of agitation
Treatment of neurovegetative symptoms associated with vertigo
Treatment of the symptoms of alcohol, opiate, and benzodiazepine withdrawal
Short-term treatment of insomnia
Treatment of muscle spasms
Treatment of tetanus, together with other measures of intensive treatment
Adjunctive treatment of spastic muscular paresis (paraplegia/tetraplegia) caused by cerebral or spinal cord conditions such as stroke, multiple sclerosis, or spinal cord injury (long-term treatment is coupled with other rehabilitative measures)
Palliative treatment of stiff person syndrome
Pre- or postoperative sedation, anxiolysis or amnesia (e.g., before endoscopic or surgical procedures)
Treatment of complications with stimulant overdoses and psychosis, such as cocaine or methamphetamineUsed in treatment of organophosphate poisoning and reduces the risk of seizure induced brain and cardiac damage. Preventive treatment of oxygen toxicity during hyperbaric oxygen therapyDosages should be determined on an individual basis, depending on the condition being treated, severity of symptoms, patient body weight, and any other conditions the person may have. Seizures
Intravenous diazepam or lorazepam are first-line treatments for status epilepticus. However, intravenous lorazepam has advantages over intravenous diazepam, including a higher rate of terminating seizures and a more prolonged anticonvulsant effect. Diazepam gel was better than placebo gel in reducing the risk of non-cessation of seizures.
Brunner syndrome is a rare genetic disorder associated with a mutation in the MAOA gene. It is characterized by lower than average IQ (typically about 85), problematic impulsive behavior (such as pyromania, hypersexuality and violence), sleep disorders and mood swings. It was identified in fourteen males from one family in 1993. It has since been discovered in  additional families. Signs and symptoms
Causes
Brunner syndrome is caused by a monoamine oxidase A (MAOA) deficiency, which leads to an excess of monoamines in the brain, such as serotonin, dopamine, and norepinephrine (noradrenaline). In both mice and humans, a mutation was located on the eighth exon of the MAO-A gene, which created a dysfunctional MAO-A gene. The regular function of MAO-A, breaking down monoamines, is disrupted, and monoamines build up within the brain. Mice that lacked a functional MAO-A gene displayed higher levels of aggression, in comparison to mice with a functional MAO-A gene. Diagnosis
Upon suspicion of Brunner syndrome and after having eliminated other potential suspects via means of differential diagnosis, Brunner syndrome is diagnosed by genetic testing for specific mutations of the MAOA gene. Since the syndrome is so rare, it is usually only suspected and tested for if there are other diagnosed instances of the syndrome in ones direct family. Treatment
Progesterone & Rauwolfia serpentina (containing Reserpine) are a possible treatment as they both increase MAO-A activity. History
Brunner Syndrome was described in 1993 by H.G. Brunner and his colleagues upon the discovery of a particular genetic defect in male members of a large Dutch family.