Lamotrigine formula?

What is the chemical formula for lamotrigine?

Lamotrigine’s molecular (chemical) formula is C9H7Cl2N5.

What does that formula mean (what atoms are in it)?

That formula indicates lamotrigine contains:
- 9 carbon atoms (C)
- 7 hydrogen atoms (H)
- 2 chlorine atoms (Cl)
- 5 nitrogen atoms (N)

Is “lamotrigine formula” sometimes used to mean the salt form?

People sometimes search for a “formula” when they really mean the active ingredient’s identity (the molecular formula above) versus the drug’s marketed salt (which can change the full formula). If you tell me whether you mean lamotrigine base or a specific brand/generic form (tablets, ER, etc.), I can help narrow it to the right form.