Estazolam is a sleeping tablet from a group of drugs called benzodiazepines. It is a good idea to stop this medication if you no longer need it for your shift work. People using this type of tablet for more than a few days grow used to it (tolerance) and may need increasing doses to get the same effect. These types of medicines are also addictive so that when you stop taking them, you can have some withdrawal symptoms (like agitation, vivid dreams or nightmares) and it can be difficult to return to a normal sleep pattern. I usually recommend that my patients reduce the dose gradually over a few weeks while using alternative methods of sleep promotion – getting exercise and sunlight in the daytime, making the bedroom comfortable and dark, drinking some milk or chamomile tea before bed, or using meditation/relaxation exercises. While it can be a difficult period, most people manage to wean themselves off successfully – good luck!!