Hi I Take 0.25mg Of Klonopin TID, And Have Been

Hi I take 0.25mg of Klonopin TID, and have been since August. I was diagnosed with Panic Disorder. Prior to taking the Klonopin I was hospitalized several times for severe panic attacks. Prior to taking the Klonopin I took Buspar for years, but it became ineffective. I also take Lexapro 10 mg for anxiety. My question is I have went from 160 pounds to almost 210 pounds since August. I eat healthy, and I am active and want to know if the Klonopin could be the cause?