Local anesthetic dosing for children: every dental label is weight-based, and articaine draws a line at 4 years

What it says#

This entry reports what the manufacturers' labels say. The treating dentist calculates the dose for the child in the chair, from that child's weight and health status, and a healthy adult maximum is never the target for a child.

The single most useful thing in all five labels is that not one of them gives a child a milligram number. Every pediatric ceiling in dentistry is a rate applied to a weight, and two of the drugs add an age floor below which there is no dose at all.

Articaine sets an age floor at 4. ARTICADENT from Dentsply is indicated "in adults and pediatric patients 4 years of age or older," and its Pediatric Use section says safety and effectiveness below 4 years have not been established and that safety of doses greater than 7 mg/kg (0.175 mL/kg) in pediatric patients has not been established. For ages 4 to 16 the maximum is stated in the same terms as the adult one: 7 mg/kg of articaine and 0.0017 mg/kg of epinephrine, equivalent to 0.175 mL/kg. Septodont's Septocaine label puts it more bluntly: "Use in pediatric patients under 4 years of age is not recommended," and "there was insufficient exposure to Septocaine at doses greater than 7.00 mg/kg in order to assess its safety in pediatric patients." The clinical evidence behind the 4 to 16 range is small: 61 pediatric patients in the trials, 51 receiving 0.76 to 5.65 mg/kg for simple procedures and 10 receiving 0.37 to 7.48 mg/kg for complex ones, with about 13% needing an additional injection.

Bupivacaine sets an age floor at 12. The Marcaine 0.5% with epinephrine 1:200,000 dental label says it "is not recommended for children," and in two separate places, "Until further experience is gained in children younger than 12 years, administration of bupivacaine in this age group is not recommended."

Mepivacaine prints an actual table. The Polocaine DENTAL label from Dentsply and the Scandonest and Carbocaine labels from Septodont all carry a pediatric weight table at 3 mg per pound, capped at 270 mg for the 3% plain and 180 mg for the 2% with levonordefrin. For 3% plain, in milligrams and cartridges: 20 lb, 60 mg, 1.2 cartridges; 30 lb, 90 mg, 1.8; 40 lb, 120 mg, 2.3; 50 lb, 150 mg, 2.9; 60 lb, 180 mg, 3.5; 80 lb, 240 mg, 4.7; 100 and 120 lb, 270 mg, 5.3. For the 2% with levonordefrin the milligrams are the same up to 60 lb but the cartridge counts are higher because a cartridge holds less drug: 1.8, 2.6, 3.5, 4.4 and 5.3 cartridges at those weights, and the milligram figure then flattens at 180 mg for 80 lb and above. The table is attributed to Malamed, Handbook of Medical Emergencies in the Dental Office, second edition, 1982.

The same labels also print a formula, "Maximum dose for pediatric population = Child's Weight (lbs.) x Maximum Recommended Dose for Adults (400 mg) / 150," and the two do not agree. The formula works out to 2.67 mg per pound, while the table is built at 3 mg per pound; at 40 lb the formula gives about 107 mg and the table gives 120 mg. Both are printed in the same section, and the label calls the table an approximation of the calculation.

Lidocaine and prilocaine hand you a pediatric formula under 10 years. Both Dentsply labels use the same construction: it is difficult to recommend a maximum dose for children since this varies as a function of age and weight, so for children under ten with normal lean body mass and normal body development the maximum may be determined by a standard pediatric drug formula such as Clark's rule. Each gives a worked example at the same weight. For lidocaine: "in pediatric patients of five years weighing 50 Ibs, the dose of lidocaine hydrochloride should not exceed 75 - 100 mg when calculated according to Clark's rule," and "in any case, the maximum dose of lidocaine hydrochloride should not exceed 7 mg/kg (3.2 mg/lb) of body weight." For prilocaine: "in a child of five years weighing 50 lb, the dose of prilocaine HCl should not exceed 150 to 200 mg (6.6 to 8.8 mg/kg or 3 to 4 mg/lb of body weight)."

Both also give a practical volume. In children under 10 years of age it is rarely necessary to administer more than one-half cartridge per procedure for a single tooth, which the lidocaine label puts at 0.9 to 1.0 mL or 18 to 20 mg and the prilocaine label at 40 mg. In maxillary infiltration that half cartridge will often suffice for two or three teeth, and in a mandibular block it will allow treatment of an entire quadrant.

Who it applies to#

Every child getting an injection, which in most general offices means the hygiene-to-restorative handoff and the emergency child who was not on the schedule. The labels are written for the dentist administering the drug, and all of them repeat that pediatric patients should be given reduced doses commensurate with age, body weight and physical condition.

It does not apply below the age floors. Under 4 years there is no articaine dose in the label to give, and under 12 years there is no bupivacaine dose. The labels do not forbid those uses outright, they say the safety has not been established and the use is not recommended, which is a different thing legally and the same thing practically.

The sedation case deserves separate attention. The mepivacaine labels say that if sedatives are used to reduce apprehension, reduced doses should be used because local anesthetics and sedatives are both central nervous system depressants that may have an additive effect, and that young children should be given minimal doses of each agent. The pediatric anesthetic ceiling does not rise because the child is asleep.

What changed#

The direction of travel is toward an explicit age. Articaine's modern label states the 4 to 16 range in the highlights section, names the epinephrine maximum in mg/kg, and says outright that safety above 7 mg/kg in children has not been established, none of which the older narrative labels do. Lidocaine, prilocaine and mepivacaine still use the 1970s and 1980s construction: a standard pediatric formula, a worked example, and a weight table traced to a 1982 textbook.

What has not changed is the absence of an absolute pediatric milligram cap on most of these labels. There is no pediatric equivalent of lidocaine's 500 mg or mepivacaine's 400 mg; the rate applied to the weight is the whole rule, except where the mepivacaine table flattens at 270 mg and 180 mg.

Where the source is#

All pediatric language above comes from FDA-approved labeling read on DailyMed for this entry. The link under the title opens the ARTICADENT label; the downloads open Septocaine, Polocaine DENTAL, Scandonest 3% Plain, Citanest Plain Dental and Xylocaine DENTAL. Versions read: ARTICADENT published March 4, 2024; Septocaine published September 6, 2007; Polocaine DENTAL and Carbocaine published February 23, 2024; Scandonest 3% Plain published June 2, 2025; Citanest Plain Dental published November 15, 2021; Citanest Forte DENTAL published March 4, 2024; Xylocaine DENTAL published August 17, 2026; Marcaine dental published November 17, 2025. DailyMed is free and shows a version history for each label. The Malamed handbook the mepivacaine table cites is a 1982 textbook that was not obtained for this entry; the table is reported as the FDA label prints it.