This is the biggest difference between Ambien and other medications for insomnia is that it doesn�t make you feel sleepy, rather it just helps the patient maintain sleep. order ambien online no prescription It is a preferred medication of patients and doctors mainly because it usually begins working within 15 minutes, and has a short half life of just two to three hours so the patient will be able to wake up with ease the morning after taking the medication. Patients should be aware that Ambien may be associated with some side effects that patients should be aware of before taking it.