It depends. Some people do have to concentrate more than others. And many times concentration goes in and out. Often concentration varies according to interest and attention span. Not many people can focus for long periods of time and may even go in and out of focus during a TV program or the news. So if this trouble concentrating is new for you, it's worth talking to your doctor about. Ruling out medication issues or something like an attention disorder is important. But if this is not new, then it is probably just the way you are able to focus.
If your ability to focus has gotten worse, there needs to be a cause. You may want to ask your doctor to screen you for ADHD. It could be the cause of your worsening ability to focus and concentrate. Medication can help a lot.
Yes, they are ending subscriptions for now, as I have heard. JA is switching to a one question one answer/accept format. Every expert wishes to be paid for their answers (this is a paid site, not free) so if you are planning on not accepting your answers then asking another question, you may need to speak to the moderators about the limits of that plan.
It sounds like you might need a medication review to be sure the medications are not interfering with your concentration. If that is ruled out, then you may want to see your regular physician to ask about other causes. Schizophrenia does affect concentration and may be worsening your ability to focus. Talk to your psychiatrist about your symptoms so they can help.
We do need to start a new thread, if you are still wishing to ask questions.