How long does Xanax last?
Although it starts working fast, the effects of Xanax wear off quickly, in about five hours. Therefore, it’s typically taken multiple times a day.
The standard dose of Xanax for adults with anxiety disorders is 0.25-0.5 mg three times per day, according to the Food and Drug Administration (FDA). The standard dose of Xanax for adults with panic disorders is 0.5 mg taken three times per day to begin. The dosage is slowly increased as needed. Although dosing can vary widely and tends to be higher for panic disorders, the lowest effective dose should be used.
Xanax XR is an extended-release version of Xanax that only needs to be taken once per day. Xanax and Xanax XR are essentially the same medication and differ only in how long they work. They have the same side effects and treat the same conditions, such as anxiety disorders, panic disorders, and anxiety caused by depression.
Xanax XR stays effective in the body for up to 11 hours. Patients take Xanax XR only once per day because it lasts longer than Xanax.