Immunotherapy Weight Gain

I have had two months of Nivolumab treatment for metastaic melanoma and have another 10 months to go.  I have put on nearly 17 pounds of weight in the two months ive been on it.  I know that the weight gain is making my knee pain a lot worse as I have been up and down in weight for years (however I have never put this much weight on is this time).  I have used Monjaro to control my weight previous to my diagnoses and would like to go back on it.  I understand that my weight is the least of my problems but mentally I am struggling with the increase in weight.  

I have mapped and logged my food and I have a gym at home that I can do weights if I go back on it as I realise Monjaro targets muscles mass. 

Does anyone know of someone that has been on Nivolumab and Monjaro?