hai, As your brother is 24yr old. check your your body mass index by calculating with your weight and height.(weight not mentioned in your quote) regarding your concern i will give clarification below. Scientifically normal human bone stop growing in the age between 18- 24. it will attain skeletal maturity. All your cartilage part will become bone. so there is will not be any further growth. only metabolic process will occur. genetic factor: if your parents were in the any height category ,you will fall almost in same. And in this case no need for any medication any advise. Stay healthy Thank you Hope i answered your query.