As per my Dexa report I got T score of -2.1 in the the left demur femur. Other spine TScore -1.6 My age 69. I got lot Lower back pain and spondylitis of neck. My doctor told mineral density is very low although my serum calcium is 9.I order to improve my bone density my ortho doctor told me to have a one time zoledronic acid 5 mg/100 ml Shortly. My creatine is 1 and blood calcium is 9.Not taking any medication. Other than for BP. Not able you understand why this bone loss has happened to me. Little worried to take this injection due to reported side effects. My doctor told no side effects except minor ones for few days. He says he has given this to more than 800 patients and nothing to worry because I am not having any other illness. Can a any ortho doctor give a second opinion please take it as urgent Thank you.