Your milage may vary; all stimulants except for caffeine seem to ramp up my ringing. I haven't taken ritalin in years, but amphetamines definitely have this effect and I can't imaine that ritalin would be different.
If your problems with concentration stem from depression, I'm going to stick my neck out and say that trying to treat them with ADHD drugs is probably a bad idea. These drugs are pretty addictive and euphoric; if you look at how the pharmacokinetics of ritalin compare to cocaine, you will see Many Similarities.