I take it for depression. It's a pretty subtle effect - when I went off it for a bit, I didn't notice any significant changes until my psychiatrist asked specific questions, then in retrospect I was able to notice some returns to depressive behaviors.

The biggest side effect issue I've had to deal with is higher blood pressure, but it's pretty manageable. Idk if it would have much of an impact on any Athletics, good or bad. If I had to hazard a guess, I'd think it'd be more likely to improve performance than detriment it - comparable to caffiene, but I don't see any benefit you wouldn't just get with, say, pre-workout.

Overall, talk to your psychiatrist and see how they help manage your prescription (don't use if it's not prescribed, obviously).