I've used Bepanthen in the past, and indeed it is powerful and I certainly recommend it.
However now I use something which I find much better, which is not sold on pharmacies as far as I am aware an so you would need to have it made for you. It is a lip balm with 1% - 3% PCA NA. I do not really know what that is, but is some type of natural fat which birds have.
I use regularly throughout the day, and after every shower (if I just leave my lips to dry naturally, they will sure get bad right away) and my lips are pretty much normal all the time. I still get the occasional peeling day every now and then, and more often in the winter or when my immunity is low, but overall I'm pretty good.
Definitely worth giving it a shot, but again, unfortunately it doesn't cure anything, it just covers up the symptoms.