MB,
I have not personally done this regimen...but can tell you that it is common practice, and I have read countless posts from others doing similar transitions.
What's more, you can trust your P-doc as an expert in psychotropic medications, so you know you have safe medical guidance from the most knowledgeable source.
I'm sure you will hear from others who have made comparable switches, so keep checking back for responses.
Wishing you the best...keep us updated, and we'll keep you in support.
S.C.