These instructions cover typical titration for lamotrigine for someone beginning medication who is not taking another medication that interacts with it such as another seizure medication. People taking carbamazepine or valproate should follow a different set of titration instructions.
Your doctor should give you a prescription for 42 x 25 mg pills. You may also get a prescription for 100 mg pills which you do not take until after you have finished the 25 mg prescription.