Good day to you too !!
As per the history, your doctor has given injection to your father in law, the dosage for vitamins
dont need much care, the care to be taken is how injections are being given !
The injections in buttocks are given in upper-outer quadrant, if buttocks are divided into 4 regions by imaginary lines. The other three areas are the red alert areas, which contain various nerves like sciatic nerve
and other major venous plexus.
The dosage is mostly alternate days on average aged patients but his age is more so the doctor has advised for more days in between.
hope above info helped you !
Dr Hari Om Chandrakar