How long does it take for Keppra to be effective in your body? how long before it becomes adjusted?

Keppra reaches what is called Steady State in 2 days with twice daily dosing. So if you are taking your medication once in the morning and once in the evening, 2 days after your first dose - you will have the level in your blood stream that your doctor is wanting to try.

I am not sure what you are asking about how long before it becomes adjusted. If you mean how long will it take for you to become used to taking the medication? This is very much dependent on the individual. Some people have no problems and adjust to the new medication immediately. Some take a long time to get used to it.
Typically when I provide education on Keppra to my patients, I caution them to monitor for dizziness and feeling drowsy for at least 1 month. This may not even be an issue for everyone. Alcohol will also make these side effects much more severe. Try to avoid all alcohol.
Other side effects that tend to get better the longer you take the medication are feeling weak all over and sore throat.

If you mean how long before your Provider will wait before adjusting your dose - this too is very independent and really cannot be answered.

Good Luck with the new medication.