Lidocaine with Adrenaline for Sebaceous Cyst Excision

Benefits and Recommendations

The American Academy of Dermatology recommends using lidocaine with adrenaline for sebaceous cyst excision due to its safety, effectiveness, and provision of superior hemostasis and prolonged anesthesia compared to lidocaine alone 1, 2, 3
Vasoconstrictors like epinephrine play a critical role in dermatologic surgery by slowing anesthetic mobilization, prolonging its effect, reducing peak blood levels, and providing hemostasis—all essential for clean excision of sebaceous cysts 2, 3
The use of lidocaine with epinephrine extends the anesthesia duration by approximately 200% regardless of concentration, providing prolonged anesthesia 4, 5
Epinephrine provides superior hemostasis, which is particularly important for complete removal and preventing recurrence of sebaceous cysts 6
The addition of epinephrine reduces systemic toxicity by limiting systemic absorption and reducing peak blood levels of lidocaine 3, 6
Lidocaine with epinephrine achieves anesthesia within 2-5 minutes, allowing for faster onset of action 6

The American Academy of Dermatology recommends using the lowest effective concentration of epinephrine (typically 1:100,000 or 1:200,000) to provide adequate pain control and vasoconstriction 2, 3, 5
The maximum safe dose for adults is 7.0 mg/kg of lidocaine with epinephrine, which allows up to 490 mg or 49 mL of 1% solution for a 70 kg adult 5, 6
For sebaceous cyst excision, most procedures require far less than the maximum dose—typically 3-10 mL of 1% lidocaine with epinephrine is sufficient 6

Adding sodium bicarbonate to buffer the solution (1:9 or 1:10 ratio of bicarbonate to lidocaine with epinephrine) decreases injection pain, which is a Level A recommendation 2, 3, 4, 6
Extensive research has thoroughly refuted the historical dogma that epinephrine causes necrosis in areas with "end arteries" 1
Multiple systematic reviews and randomized controlled trials have demonstrated no cases of necrosis when using lidocaine with epinephrine on digits, ears, nose, hands, and feet 1, 4, 6
Patients with stable cardiac disease may receive lidocaine with epinephrine (Level B recommendation), but it is recommended to consult cardiology if uncertain about tolerance 1, 2, 5
Pregnant women should postpone elective procedures until after delivery, or delay until the second trimester when possible 1, 2, 5
Aspirating before each injection and using incremental injections while continuously assessing the patient for early signs of toxicity are recommended safety precautions 5, 6
Avoid using lidocaine with epinephrine within 4 hours of other local anesthetic interventions to prevent cumulative toxicity 6