Question: oxazepam how long in system?
Answer: Serax (oxazepam) is a benzodiazepine that is often prescribed to treat anxiety, insomnia, and alcohol withdrawal symptoms. This sedative drug can stay in a person's system up to 30 hours after last use. Serax stays in a person's system for about 30 hours. The half-life of Serax can range anywhere from five to 15 hours.