Hi there ~
Side effects of medications are not uncommon, however it is good to know what those might be. Tegritol may cause problems or difficulty with concentration which may be due to the possible drowsiness
that the medication may cause. Most people get acclimatized with the medication's side effects over a period of time, as in your own case where most side effects have gone away. Please be patient and if it is still not going away and is cause you to have significant problems with daily living, decreasing the morning dosing
or taking part of the morning dose away and using more at night may be one solution. However you need to consult your psychiatrist
in that situation.
Take care and I hope this was helpful.