I was looking up exorcism stuff on the Vatican website and stumbled across this from (then) Cardinal Ratzinger (now Pope Emeritus Benedict XVI)
From these prescriptions it follows that it is not even licit that the faithful use the formula of exorcism against Satan and the fallen angels, extracted from the one published by order of the Supreme Pontiff Leo XIII, and even less that they use the integral text of this exorcism. Bishops should take care to warn the faithful, if necessary, of this.
So does that mean that the St. Michael Prayer:
Glorious St. Michael the Archangel, defend us in battle, be our protection against the wickedness and snares of the Devil, and do thou o Prince of the Heavenly Host, by the power of God, cast into hell Satan and all the evil spirits who prowl about the Earth seeking the ruin of souls. Amen
which I learned by heart 15 years ago and say every time the creepy crawlies pound on my windows at 3 AM is verboten?