Melody,

If you plan is under the Medicare umbrella (dictated by what is allowed under Plan D) they dont cover anti-anxiety meds at all in that class (not sure why - its silly) - but they do cover sleeping pills such as ambien, etc......

You can find Alprazalom (generic for xanax) at drugstore.com for almost as cheap as Costco, they ship it to you..... or as Dahlek says - you will reach your deductible asap with IVIG and get ambien or other traditional sleeping medication on your current plan....

Hope you get some sleep