Brief Answer:
To be XXXXXXX the possibilities are nil.
Detailed Answer:
Hi Welcome to Health care magic forum.
As you describe, usually, medically the possibilities are nil.
For that you are expected to know the reasons,the growing points are present at the ends of the long bones,so long they are active,the person will be growing.
When the growth centers are active,the other factors like nutrition,blood,general health, genetics etc has to aid the growth.
If there is
malnutrition, ill health like chronic diseases like
tuberculosis,or genetics like both or one of the parents are short etc are present in spite of the growing capacity they cant have growth.
What ever the reason for growth retardation, when she crosses, 18years,the active points closes, stops the growth, and height growth is stopped permanently.
After that period,if she takes the nutritious food, got cured of the chronic diseases, she cant have increase in growth.
She can have improvement in the weight with out any restriction.
There are surgeries,to increase the heights,with lots of side effects, and life risk.
There are some over the counter drugs, which have no clarity of how they work, of course some people may use them. For us there will be no information about those drugs.
I thing the answer is informative to your satisfaction.
Wishing for a good luck. thank you.