Abstract: The present invention relates to a stable ready to use and powder for oral suspension dosage forms of Lamotrigine and its pharmaceutically acceptable salts and process of preparing such compositions. The liquid and powder for oral suspension dosage forms of Lamotrigine have been previously known only as extemporaneous preparations. Present invention relates to manufacture of liquid and powder for oral suspension dosage forms of Lamotrigine having improved physico-chemical properties with desired technical attributes. The prepared dosage forms are useful in patients having difficulties in swallowing tablets and provide physician with more options for dose titration.