My wife is taking Morphine and Oxycodone for chronic back pain from a vertebral fracture 2 years ago (repaired) and herniated disks. She is finding that her hair (which has always been very thick and healthy) is thinning dramatically. She is also taking Simvastatin and an anti-depressant, Citalopram, and an amphetamine for ADHD. Is hair loss a normal side effect of these meds, and, if so, what can be done to combat the problem?