Yes, the abdominal or digestive problems COULD be due to the side effects of Paroxetene, an SSRI
type of antidepressant that you are being prescribed. It is quite common in the initial stages of treatment but if it is still persistent even after 6 months then you MUST inform your psychiatrist/prescribing doctors. If I was your psychiatrist, I would definitely want you to tell me about it, so that I would help you better.
If there has been a recent dose increase that could explain the side effects for being present even after 6 months of treatment or you may be one of the rare patients whose body is not tolerating it very well.
PLEASE DO NOT STOP YOUR MEDICATION. THIS WILL CAUSE MORE PHYSICAL AS WELL AS PSYCHOLOGICAL PROBLEMS, if it is stopped inappropriately, SINCE PAROXETENE IS A SHORT ACTING ANTIDEPRESSANT WHICH CAN CAUSE WITHDRAWAL PROBLEMS IF STOPPED ABRUPTLY.
Your psychiatrist will be the best one to help.