Stella, welcome to Psych Central. Sorry you are having difficulty adjusting to the dose. Some people go from 200 to 250mg and stay there a couple weeks before increasing again if needed. Tell your doc the problem and see if you can do 250mg or 225mg depending on pill size.

I was researching Lamictal here in a blog by an MD
Bipolar Medication Spotlight: Lamictal (Lamotrigine) | Bipolar Beat

It should be up to your doctor with your feedback on how increase affects you, to say how long before moving up.
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