I can't find an interaction between pravastatin and levo, but that doesn't mean there isn't one.
Levo should be taken on an empty stomach, then nothing to eat or drink except water for 30-60 minutes. There are people who take it at night; however, you do need to make sure there's adequate time for your stomach to empty, between your last meal and taking the med.
All other medications should be separated from the levo for a couple hours, if possible.