maximum daily dosage for xanax
1 Anxiety: An initial dose of 0.25 mg to 0.5 mg of Xanax is administered orally, three times a day. 2  The dose can be increased gradually every three to four days up to maximum daily dose of 4 mg in divided doses.3  Panic: An initial dose of 0.5 mg of Xanax is administered orally, three times a day. Depression: An initial dose of 0.5 mg of Xanax is administered orally three times a day. 2  The dose can be increased by no more than 1 mg every three to four days. 3  An average dose of 3 mg of Xanax daily in divided doses has shown to be most effective.