Okay, even more confused after looking at my prescription drug formulary on my insurance.

What is the difference between: Lamictal, Lamictal XR and Lamotrigine ER? Is Lamotrigine ER just a generic for Lamictal XR?

My PDoc sucks so if I don't ask for the correct RX at my visit then he will make me schedule another appointment for a new script and his appointments are ALWAYS 6-8 weeks out.

I'm trying to find the cheapest form of Lamictal with my RX plan so I will know what will be best for me cost wise before my appointment.