I'm on 0.5 mg Xanax XR; I take one pill in the morning and the other at night, before bed. That is a total of one mg a day. How long after taking it does it take to get into your system, and how long does it stay in your system? After how long do its effects start to wear off, and one needs another one? Is 0.5 Xanax XR a suitable dose for generalized anxiety disorder? I've been on it for years and now I'm kind of curious about some stuff.
Xanax (alprazolam) is a benzodiazepine and is used to treat anxiety disorders, panic disorders, and anxiety caused by depression.
Xanax XR Tablets are usually prescribed once daily, preferably in the morning.
Xanax XR is absorbed at a slower rate than regular Xanax with constant levels maintained from 5 to 11 hours after dosing.
Food has a significant effect of the bioavailability of Xanax XR. A high-fat meal given up to 2 hours before dosing can increase drug levels by about 25%.
Xanax XR is absorbed quicker in the morning compared with night time dosing.
The mean plasma elimination half-life of Xanax (much the same as Xanax XR) is reported to be 11.2 hours. The full range is from 6.3 to 26.9 hours in healthy adults.
For a drug to be totally eliminated from your system it takes 5.5 times the half life which equates to around 6 days.
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