I am on prozac (fluoxetine) for ibd related anxiety, can this exacerbate add symptoms?

No: Antidepressants like Prozac (fluoxetine) have not been shown to worsen adhd symptoms. However, if you are on medication for adhd, perhaps it is lowering the effectiveness of that medication. On the other hand, if you are still anxious, the anxiety can make it hard for you to concentrate, leading to adhd-like symptoms.

Yes, sometimes.: Any med that is not a good "fit" (in type of med, or dose, or the specific combination of meds) can make any problem you have worse, or create new problems. The specific med regimen that suits you needs to be determined through ongoing careful clinical supervision. It's a process that requires a motivated, compliant patient communicating well with a dr expert in psychoactive meds.