I got a script for Fioricet for tension headaches, but I was very surprised to see it said it could be habit forming. Wondering what is in it. Someone told me it is a barbituate? Is that true? Barbs are dangerous and rarely prescribed b/c I thought those can affect breathing. Doctor said nothing. Have not taken one yet, but my head is killing me, but I wonder b/c I take Xanax for my panic disorder and doctor knows this so I am concerned about the interaction. More info if anyone has taken Fioricet and is familiar with this drug. Thanks