Unfortunately, My body has to take Meds 3x's a day. I tried it but taking meds for 41 years, the body gets to handle it over time and builds up a resistance, thus more MEDS are taken.

I don't know if 'immediate release' vs. 'extended release' will affect your body or not. It's a matter of convenience and how many times per day you want to be taking pills. You might find the following article of interest:
https://en.wikipedia.org/wiki/Time_release_tech...
I take Levetiracetim XR and am happy that I don't have to take it multiple times per day. I also don't have to worry about blood levels being too high or low. The XR keeps them at an even keel.
Your milage may vary. :-)

I've been on the XR now for about 6 months if not longer. I was in a similar situation as yourself. I am thankful I am on it. All you can do, is try it. It's not going to hurt you. It did seem to help reduce the effects. I don't recall how long it took though. I take 300mg am and 250mg pm. I take it exactly at the same time. 7 & 7. This seems to help when I keep it like this to prevent any differences/ feeling/ symptoms.
I wish I knew about XR earlier. It might of helped me earlier and kept me from changing my dosage.
Best of luck to you.

I don't know if anybody is still reading this topic, but I just found it, and it was a huge help! I do know exactly why the generic and the brand vary so much, and it is not commonly known. The AMOUNT of the active ingredient is required to be the same, but they are allowed a 20% variation in the *confidence interval* measurement when the study is done to try to prove that brand and generic meds are the same. Basically, the confidence interval measures how sure you are that you got the result you thought you did. that is a HUGE variation... Being allowed a twenty percent variation is almost unbelievable to me. There's no way to know exactly why you are seeing that much of a difference in how sure you are about your result. Most people seem to be able to handle such a huge variation for most drugs, but not epilepsy meds. That has been known for a long time, but it is not always shared with the patients.

I am also on lamictal and I had somewhat of the same issue. My doctor increased my meds a couple times and now I'm doing well. My doctor said I still have plenty of room to increase my meds if needed