I am 18 years my height is 5.6i my father is 6ft my mother is5.2 i want to add 4inch more in my height please suggest me some medicine?

What will be will be: If a teen had no growth in the past year, then growth has finished. Most people reach their maximum height in their late teens. Without nutritional problems or chronic childhood illnesses, height is largely based on genetics and parental heights. Aside from eating right, exercising, sleeping well, and being happy, there's not much a person nor his doctor can do to increase height.