I have hair loss and i am on the following meds & suppliments:Ketocnazole 200 mg, Naproxene 250mg, cyclobenzeprine 150mg, Levothyroxine175, Xanax0.25mg Tylenol # 3, Glocosimine& chrondrotine, Hair skin & Nails 5,000, Vitamin b 12, what could be causing substantial hair loss Iam 52 yrs old.