It is hard to say. New medications do take time to adjust to, sometimes up to a few weeks. As your body adjusts, you can experience stronger sides effects. Then as you get used to the medication, the side effects will reduce or go away completely. You may want to call your doctor to see if concentration problems are an expected side effect.
Whoever prescribed your medications is who you should talk with about possible side effects. If it's been months since you started the medications and you don't feel your memory or concentration is any better, then you may need an adjustment of your medication. You may be taking too much or it could be you are taking the wrong medication for you. The doctor who prescribed your medications should be able to figure out what is going on. Sometimes it takes a little bit of adjusting before you can find medications that work for you so what you are experiencing is not unusual.
It sounds like something else is causing your memory and concentration issues then. Most of the time when you are interested in something, you should be able to focus. But if things that interest you do not help you concentrate, then there is another cause. It could be stress, medications or another issue. It would be good to talk with your psychiatrist to see what he/she can do to help.
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