Herceptin and weight gain

Hi everyone,

I am curious if any of you have experienced the same thing. I have been on Herceptin since 8 Sep, every 3 weeks. Before my 1st treatment, I was about 118 - today I saw the Doctor, and am at 135. This seems so dramatic. Although my clothes aren't fitting that much different, I am amazed at this. I can't think of what else it could be. I have been on Zoloft since April, and no weight gain. Had my ovaries out 1 Mar, and no weight gain. I know I shouldn't complain, but should I mention this significant gain to the oncologist? The doctor I saw today was my endocrinologist ( I still see him from having grave's disease) who follows me with my synthroid. Anybody else experience this?