Hello,
Thanks for the query to H.C.M. Forum.
Prozac ( fluoxetine ) and now amitryptiline as these both drugs are antidepressant and this is naturally you gain weight with these drugs.
You have not mentioned why, are you visiting
neurologist ?
As far as concerned about knee pain going upstairs & downstairs may be due to,
1
Osteoarthritis , diagnosis can be confirmed by CT SCAN and X ray of both knee , consult an orthopedic doctor and get his opinion.
2
Rheumatoid arthritis , diagnosis can be blood examination for rheumatic factor.
3 Gouty arthritis , get in blood for uric acid as this is very important tool in
joint disease.
As you mentioned that they done
knee surgery , still painful so all these above mentioned tests are important , get it done and once again consult orthopedic doctor and get his treatment and opinion.
Good luck. Dr. HET