Your father will require a pain killer to try and control the pain, restart the vitamin B12 deficency medications, he will also require another multivitamin to correct other deficiencies, increase intake of water to 3 liters per day if he doesn't have any renal problems. It is likely that due to the vitamin B12 deficency has caused reduced red blood cell production which would've reduced the effective oxygen transport throughout the body.

Please Take Tab hifenac TH 1 Twice a day Tab pan 1 perday Tab neurobion forte 1 Twice a day All for 5days Later on... Take dates beet root jaggery green leafy vegetables regularly Take salads and fruits more Take vegetables juices and soups more Take milk regularly Take Tab osto calcium 2 per day for 3 months Tab fersoft Z 1 for 3 mths Go for morning and evening walk daily for good digestion and easy defication and good circulation Do some relaxing exercise daily