My husband was given a "replacement" for alprazolam 2mg tablets which absolutely does NOT work! The pill is round, white, has intertwined ww on one side and a single score in the middle with a D on the top half and a 2 on the bottom half of the other side. I used to take xanax/alprazolam to help me sleep at a .5mg dosage, so I took 1/4 to see if it would work for me and it does not work! What is this drug?