For haemoglobin, go for Inj orofer IV, slowly by 8 drops / min initially because of the age of the patient. It will increase the Hb within 24 hrs.
Next Steps
Start with ORS to him 2-3 times a day to maintain electrolyte balance in body, which If deficient may cause low BP or dizziness and fatigue.
Health Tips
For any medicinal assistance contact personally via paid consultation and medicine will be sent to you at your door step.