My doctor has me taking Wellbutrin and Celexa (citolapram) and they work well together
Common side effects include diarrhea and delay/inhibition of orgasm. Amongs teens & children, some research indicates an increased risk of suicidal thoughts.
As far as i know 5mg is a pretty low dose, most people like myself start on 10mg and then increase to 20mg after a short while (10 days for me). As to whether its addictive, i havent heard anything along these lines...hope this helps a little