What does SPECT stand for? SPECT stands for Single Photon Emission Cardiac Tomography (nuclear cardiology) Suggest new definition This definition appears very rarely and is found in the following Acronym Finder categories:
Expert: Dr. Arun Phophalia replied 5 years ago. Greetings. In a study the average lethal dose for Xanax has been found as 22 mg. But death can occur at 10 mg single dose. With alcohol, there is further central nervous system depression and the lethal dose can be far less. Though for it (combination and alcohol)data are not available.
To answer your question 15-20 min you will begin to feel effects. Although it is concerning you mention a 5mg Xanax pill, Xanax only comes in .25mg, .5 mg 1mg and 2mg pills. All would take effect around the same time period though and last approximately 4 hours depending on tolerance.