Why is slow titration important with lamotrigine, and what skin reaction must be watched for?

• A. Slow titration reduces risk of Stevens-Johnson syndrome; monitor for rash, especially within the first weeks of therapy.
• B. Slow titration increases the risk of liver toxicity and requires liver function testing.
• C. Titration speed has no impact on adverse reactions.
• D. Rapid titration is recommended to achieve quicker seizure control.

Answer: (A)

Lamotrigine carries a real risk of a serious skin reaction, Stevens-Johnson syndrome, which is more likely if the dose is increased quickly. Slower titration gives the body time to adjust and reduces this hypersensitivity risk. The skin reaction to watch for is a new or worsening rash, often accompanied by fever or mucous-membrane involvement, that can progress rapidly. Any new rash, especially in the first weeks of therapy, should prompt immediate discontinuation of lamotrigine and urgent medical evaluation. If valproate is also being used, the risk is higher, so even slower titration and closer monitoring are important.