The prescription drug known as estazolam is in a class of drugs known as central nervous system (CNS) depressants. The group is shared with other substances including barbiturates, alcohol, and other sedatives or sleep aids. It is used to induce anxiolytic feelings as well anticonvulsant, hypnotic effects to calm hyperactivity in the central nervous system. CNS depressant drugs produce their results by suppressing the excitability of the nervous system, which results in the user to feel relaxed physically and cognitively.Depressants can cause several adverse effects that range from tolerance to addiction. As previously mentioned, these reasons push doctors to only prescribe the medication for short-term therapeutic reasons for anxiety or insomnia. Physicians generally warn their patients to not use benzo drugs for more than four weeks at a time.If you become tolerant or dependent on the drug, it can increase the intensity of anxiety or insomnia symptoms. It can also lead to dangerous withdrawal symptoms that can lead to fatalities if not monitored properly. For these reasons, if you do become dependent on the drug, you must be aware of the withdrawal symptoms.