Is Lignocaine 2% + Adrenaline Safe? Dentist's Guide to Lignox

# Is Lignocaine 2% + Adrenaline Safe? Dentist's Guide to Lignox *Medical Review by Dr. Dhivakaran | 2026-06-21* ## Overview Lignocaine 2% + Adrenaline, commonly sold as **Lignox, Xylocaine**, is a standard medication used in dentistry. ## How does it work? Temporarily blocks nerve signals to the brain. ## Who should take this? Used by doctors for extractions and [root canals](/treatments/root-canal-treatment). ## ⚠️ Safety Warning **Who should avoid it:** Patients with uncontrolled hyperthyroidism (due to adrenaline). **Pregnancy Safety:** Category B. Generally considered safe. ## Patient Instructions > Do not chew your lip while numb. ## References * Malamed: Handbook of Local Anesthesia --- *Disclaimer: This content is for informational purposes only and does not substitute professional medical advice.*