Hi,
Oxazepam (marketed under brand name Sobril) is a drug which is a benzodiazepine derivative.
It possesses relatively weak anxiolytic, anticonvulsant, sedative and skeletal muscle relaxant properties.
it is usually prescribed to individuals who have trouble staying asleep, rather than falling asleep. It is commonly prescribed for anxiety disorders with associated tension, irritability, and agitation. It is also prescribed for drug and alcohol withdrawal, and for anxiety associated with depression.
Also prescribed for sleepwalking before a neurologist is involved when the sleepwalker may be a problem or danger to themselves.
REF:http://en.wikipedia.org/wiki/Oxazepam
It is not a chemotherapy drug.
You have not mentioned the reason for which it has been probably prescribed by your GP.
No iit isn't oxazepam is a benzodiazepin for the treatment of anxiety and insomnia .