### instruction:
If you are a doctor, please answer the medical questions based on the patient's description.

### input:
I sprained my right ankle about 4 months ago...its not a break.  I went to the Rothman Institute in Philla and was given a shot of cortisone in my ankle.  In the joint between the fibula and tibia where the front of my foot meets my leg and where the ankle bends.  I have had rounds of PT and that didnt help.  I had a cortisone shot yesterday and so far there is great improvement.  I cannot fine the correct PI on here.  I am an RN, but want to know when it peaks and the half life.  I know I can have only 3 of these a year.  Although it feels better today, the Doc. said I may only need just this one shot.....if the peak is only 8 hours, how can that be true?  The half-life seems to be short too.  I cannot find a PI on here.  I have drug books and may resort to them, but really I was in such pain before the shot!  Its ruined my golf game!  Should I be using it full force or relax it?  Anyway the shot was not IM, it was in the joint, and that name escapes me.  Can I find the PI on line??  I should be able to, or Ill just look into my nursing drug books.

### output:

Hello, Thanks for writing to us, I have studied your case with diligence. As per your history and injury pattern there can be persistent tear of ankle ligament leading to pain and swelling. Instability may increase due to laxity of ligament. I will advise doing MRI ankle for soft tissue involvement. Till time, you can continue use supportive splint or brace. Physiotherapy like ultrasound and TENS will help in early healing. Persistent pain after ankle injury is common and may take 6 months to heal. If there is complete ligament tear on lateral aspect then arthroscopic ankle ligament repair can be done. Hope this answers your query. If you have additional questions or follow-up queries then please do not hesitate in writing to us. I will be happy to answer your queries. Wishing you good health. Take care.