I thought i saw he was losing it but my memory is terriblle these days. Eil Crannel is an anti-androgen similar to spironolactone. Theres a bit more about it here....
I wonder if the combined stress of his band breaking up and not being able to play guitar has increased or accelerated his hairloss. I think stress can be a big factor if you are a midly susceptible to male pattern baldness.