Dental anesthesia — what to expect.
Local anesthetic, nitrous, and oral sedation are routine and very safe. Here's what's normal, what's not, and what to do if something feels off.
Local anesthesia.
Numbing of the lip, tongue, or cheek that lasts 1–4 hours depending on the agent (lidocaine, articaine, mepivacaine). Mild bruising or soreness at the injection site is common and resolves in a day or two. A racing heart for a few seconds during injection (from the epinephrine in the anesthetic) is normal.
Nitrous oxide.
A feeling of warmth and lightness during the procedure. Wears off within 5 minutes after the mask is removed. Occasional mild nausea — we adjust the flow rate or stop. No driving restriction.
Oral conscious sedation.
Drowsiness and mild loss of memory that lasts 4–6 hours. You'll need a ride home and someone to be with you the rest of the day. Avoid alcohol, heavy meals, and operating anything machine-like for 24 hours.
When to call us.
Numbness lasting more than 24 hours. Significant facial swelling that worsens. Hives, breathing difficulty, or chest tightness — call 911 first.
Common questions.
Can I be allergic to dental anesthetic?
Rare. True allergies are documented in your chart. More often, patients react to the epinephrine — we can use anesthetic without epinephrine if needed.
Is sedation safe during pregnancy?
Nitrous is avoided in the first trimester. Local anesthesia is considered safe. We coordinate with your OB if there's any question.
Will I feel pain?
If you feel anything sharp during the procedure, raise your hand — we'll add more anesthetic. The goal is zero sharp sensation.
Questions about comfort or safety?
Ask us before your appointment — we'll review the plan with you in advance.
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