I was living a very healthy life ,before 15 days I took pantocid and acogut as prescribed by doctor ,after taking the tablet I am suffering very severe pain in Both knees, My reports are normal Bs 141 (Random) H1bac 5.2 ESR 10 URIC ACID 3.85 Crp 4 Cbc normal Anti cpp less than 7 Ra factor 7.2 Vit b12 450 Vit d 19 Doctor says it may be due to vitamin d deficiency, but I want to know vitamin d would not suddenly drop in 15 days Pls suggest what diagnose should I do Knee x ray report quite normal