Switched to Wellbutrin

Today my doctor switched me from Prozac to Wellbutrin. The prozac just wasnt working out for me. I had been on it for about 8 weeks and I didnt feel much better. I have heard good things about Wellbutrin though. My sister told me that it actually increases sexual desire. She learned that from her pharmacology book (she is studying to become a nurse). My doctor said that it may take another 4-6 weeks for Wellbutrin to start working. I am optimistic about it though.