Epinephrine is commonly used to extend the numbing effect of local anesthetics.
Tell your dentist if you have severe thyroid, diabetic, or cardiovascular disease, high blood pressure, or are pregnant. Also, inform your dentist if you are taking any medications. If your systolic blood pressure is over 160, your dentist might avoid using epinephrine with local anesthetic and refer you to a physician.
What is Epinephrine?
Epinephrine, also known as adrenaline, is a natural hormone that your body produces. In medicine, it is used for many purposes, and in dentistry, it is a very important additive to local anesthetics like Lidocaine.
Why is Epinephrine Used with Local Anesthetic?
You will usually find epinephrine combined with local anesthetics in dentistry. It serves two key purposes:
It makes the anesthetic last longer: Epinephrine is a "vasoconstrictor," meaning it narrows the blood vessels in the area of the injection. This prevents the anesthetic (like Lidocaine) from being carried away by the bloodstream too quickly, keeping you numb for a longer, more effective period.
It controls bleeding: By narrowing the blood vessels, it also minimizes bleeding at the procedure site. This gives your dentist a clear view of the area they are working on, which is critical for a successful procedure.
Using epinephrine is a standard, safe, and effective way to ensure you remain completely numb and comfortable throughout your dental treatment. Your dentist will use the lowest effective dose and will always review your medical history to ensure it is safe for you.