For last 2-3 days I was feeling some pain in my neck, and due to intense office work its difficult to maintain posture properly. So I consulted a doctor and after Vitamin D test I was found vitamin D deficient (8.1 ng/ml). Also since yesterday I was feeling some sensation in my hands and a very light pain in the sholder when I wake up after a sleep. Doctor recommended me an injection: arachitol 6 lac injection (only one). I just wanted to confirm if it is recommended to go for this injection in my condition or are there any side effects of this? Please suggest...