I have high b12 which is greater than 2000 after taking meaxon plus 1ml injection one dose  is due to that level increased or i haven taken typhoid treatment last month and before taking injection Iam not able to walk properly and iam having weakness, Numbness or tingling in the hands and feet,short of breath if I walk too much,headache that's why my doctor given injection now should I continue injection or should I stop taking them