As long as it's not jumping from the frying pan to the fire, you might try a tranquilizer in the transition. Like the famed Xanax... Although most of these are "addictive", if taken with care and for transition, it might do the trick.
There are some good herbal tranquilizers too, like orange and/or lemon leaf in camomile tea. Believe me, the citrus leaves have a surprising effect, especially for sleeping.
But it might be better to hit it harder at first with something like Xanax, when the going is worst. Don't overdo the tranquilizer either.
Anyways, your psychiatrist would probably know better.