Accurate dosing of local anesthetics is one of the most fundamental clinical skills in dentistry—and one of the easiest to get wrong under pressure. Whether you are calculating maximum cartridges for a pediatric patient, comparing epinephrine limits for a cardiac-compromised adult, or simply double-checking the mg per cartridge of a less-familiar agent, having a reliable quick-reference dosing chart on hand saves time and reduces risk.

This page consolidates the most commonly referenced local anesthetic dosing data into a set of clean, scannable tables. You will find adult maximum recommended doses (MRDs), duration-of-anesthesia ranges, epinephrine limits, and pediatric MRD values—all in one place. Every value is sourced from Malamed’s Handbook of Local Anesthesia (7th Ed.) and AAPD clinical guidelines.

If you prefer to have these calculations done for you automatically, try the free Dental Local Anesthetic Calculator. For a step-by-step walkthrough of the math behind these tables, see the How to Calculate Local Anesthetic Dose guide.

Adult Maximum Recommended Doses

The table below lists the five local anesthetic agents used in dental practice, along with their commercially available formulations, vasoconstrictor concentrations, weight-based MRDs, absolute maximum doses, and the milligrams of anesthetic contained in a standard 1.7 mL dental cartridge. These values apply to healthy adult patients and represent upper limits—not target doses.

Drug Formulation Concentration Vasoconstrictor MRD (mg/kg) Absolute Max (mg) mg per 1.7 mL Cartridge
Lidocaine + Epi 2% Epinephrine 1:100,000 7.0 500 34
Lidocaine + Epi 2% Epinephrine 1:50,000 7.0 500 34
Lidocaine Plain 2% None 4.4 300 34
Articaine + Epi 4% Epinephrine 1:100,000 7.0 None listed 68
Articaine + Epi 4% Epinephrine 1:200,000 7.0 None listed 68
Mepivacaine Plain 3% None 6.6 400 51*
Mepivacaine + Levo 2% Levonordefrin 1:20,000 6.6 400 34
Bupivacaine + Epi 0.5% Epinephrine 1:200,000 N/A 90 9
Prilocaine + Epi 4% Epinephrine 1:200,000 8.0 600 68
Prilocaine Plain 4% None 6.0 600 68

* Mepivacaine 3% plain contains 51 mg per 1.7 mL cartridge. Some references cite 54 mg based on a 1.8 mL cartridge volume. Always verify cartridge size before calculating.

A few important notes on this table. First, bupivacaine does not have a weight-based MRD—its dosing is governed solely by the absolute maximum of 90 mg per appointment. Second, articaine does not have a published absolute maximum in Malamed; its ceiling is determined entirely by weight. Third, when using lidocaine 2% without a vasoconstrictor, the MRD drops significantly from 7.0 to 4.4 mg/kg and the absolute max falls from 500 to 300 mg. This is a common source of confusion on board examinations and in clinical practice.

For a deeper dive into lidocaine-specific dosing, including worked examples and clinical scenarios, see the Lidocaine Maximum Dose in Dentistry guide.

Duration of Anesthesia

Choosing the right local anesthetic is not only about staying within safe dose limits—it also depends on the type and length of the procedure. Pulpal anesthesia duration determines how long you have to work on the tooth itself, while soft tissue anesthesia duration affects how long the patient will experience residual numbness after the procedure. The ranges below are approximations based on block injections; infiltration durations tend to be shorter.

Drug Formulation Pulpal Anesthesia (min) Soft Tissue Anesthesia (min)
Lidocaine 2% + Epi 1:100,000 ~60 180–300
Lidocaine 2% + Epi 1:50,000 ~60 180–300
Lidocaine 2% Plain ~5–10 60–120
Articaine 4% + Epi 1:100,000 ~60–75 180–360
Articaine 4% + Epi 1:200,000 ~45–60 120–300
Mepivacaine 3% Plain ~20–40 (infiltration) 120–180
Mepivacaine 2% + Levo 1:20,000 ~60 180–300
Bupivacaine 0.5% + Epi 1:200,000 ~90–180 240–540
Prilocaine 4% + Epi 1:200,000 ~60–90 180–480
Prilocaine 4% Plain ~10–15 (infiltration) 90–180

Several clinical patterns stand out. Lidocaine 2% without a vasoconstrictor provides only 5 to 10 minutes of pulpal anesthesia, making it inadequate for most restorative or surgical procedures. Bupivacaine 0.5% with epinephrine offers the longest duration of any dental local anesthetic—up to 3 hours of pulpal and 9 hours of soft tissue anesthesia—making it the agent of choice when prolonged postoperative pain control is desired (e.g., third-molar surgery). Mepivacaine 3% plain is a practical mid-range option when a vasoconstrictor is contraindicated but a reasonable working time is still needed.

Epinephrine Reference

Epinephrine concentration, total content per cartridge, and maximum cartridge counts are among the most commonly tested—and most commonly confused—values in local anesthesia. The table below provides a quick reference for the three standard epinephrine concentrations used in dental cartridges, along with maximum cartridge limits for both healthy adults (200 µg limit) and cardiac-compromised patients (40 µg limit).

Epi Concentration µg/mL µg per 1.8 mL Cartridge Max Cartridges (Healthy: 200 µg) Max Cartridges (Cardiac: 40 µg)
1:50,000 20 36 5.5 1.0
1:100,000 10 18 11.0 2.0
1:200,000 5 9 22.0 4.0

Levonordefrin 1:20,000: 50 µg/mL, 90 µg per 1.8 mL cartridge. Levonordefrin is not interchangeable with epinephrine for dose-budget calculations. It is approximately 1/6th as potent as epinephrine as a vasopressor and is found exclusively in mepivacaine 2% formulations.

In clinical practice, the epinephrine limit is rarely the constraining factor for healthy patients. A 200 µg ceiling allows 11 cartridges of 1:100,000 epi—well beyond typical procedural needs. However, for patients with significant cardiovascular disease, unstable angina, uncontrolled hypertension, or certain arrhythmias, the 40 µg limit becomes the practical ceiling. In those cases, a maximum of 2 cartridges of 1:100,000 or 1 cartridge of 1:50,000 is the standard recommendation.

When treating cardiac patients, some practitioners opt for mepivacaine 3% plain or prilocaine 4% plain to avoid vasoconstrictors altogether, accepting the shorter duration in exchange for avoiding adrenergic risk.

Pediatric MRD Values (AAPD)

Pediatric dosing demands special attention because children’s lower body weight means the absolute milligram ceiling is reached much sooner. Overdose in pediatric patients remains a genuine clinical risk, particularly for children under 30 kg. The values below are derived from the American Academy of Pediatric Dentistry (AAPD) Best Practice guidelines for pediatric local anesthesia.

Drug Pediatric MRD (mg/kg) Age Restriction Notes
Lidocaine 4.4 None Lower than adult MRD with epi (7.0 mg/kg)
Articaine 7.0 Age ≥ 4 years Same as adult MRD
Mepivacaine 4.4 None Lower than adult MRD (6.6 mg/kg)
Bupivacaine 1.3 Age ≥ 12 years Long-acting; use with caution in pediatric patients
Prilocaine N/A — Not listed in AAPD guidelines

Key takeaways for pediatric dosing: Lidocaine and mepivacaine both use 4.4 mg/kg as the pediatric MRD, which is notably lower than the adult values of 7.0 and 6.6 mg/kg, respectively. This difference catches many practitioners off guard. Articaine at 7.0 mg/kg is the same in children and adults, but it should not be used in children under age 4 due to limited safety data in that population. Bupivacaine is restricted to age 12 and older because its long duration of soft tissue anesthesia (up to 9 hours) increases the risk of self-inflicted bite injuries in younger children.

To illustrate the clinical impact: a 20 kg child using lidocaine at 4.4 mg/kg has a maximum dose of only 88 mg. That is just 2.5 cartridges of 2% lidocaine (1.7 mL). A single additional cartridge could push the child above the recommended limit. Weight-based calculation is not optional in pediatric dentistry—it is essential.

How to Use This Chart

Applying the values in these tables follows a straightforward three-step process:

  1. Calculate the weight-based maximum dose. Multiply the patient’s weight in kilograms by the appropriate MRD value in mg/kg. For example, a 65 kg patient receiving articaine 4% with epinephrine: 65 × 7.0 = 455 mg.
  2. Check against the absolute maximum. If the drug has a listed absolute max (e.g., 500 mg for lidocaine with epi), use whichever value is lower. For lidocaine in a 90 kg patient: 90 × 7.0 = 630 mg, but the absolute max caps it at 500 mg.
  3. Convert to cartridges. Divide the maximum dose by the mg per cartridge. For the articaine example above: 455 ÷ 68 = 6.69 cartridges, rounded down to 6 cartridges.

Always round down to the nearest whole cartridge for clinical safety. If using multiple anesthetic agents in the same appointment, you must account for total dose across all agents, as their toxic effects are additive.

For a detailed, step-by-step walkthrough of this process with additional worked examples, see the full guide: How to Calculate Local Anesthetic Dose.

Calculate Instantly

Skip the manual math. The MaxDose calculator automatically computes maximum recommended doses, cartridge counts, and epinephrine limits based on patient weight. It supports all five dental local anesthetics in both adult and pediatric modes—with unit conversion, 1.7 mL and 1.8 mL cartridge options, and a clean mobile-friendly interface.

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Frequently Asked Questions

What is the MRD of lidocaine with epinephrine?

The maximum recommended dose (MRD) of lidocaine with epinephrine (1:100,000 or 1:50,000) is 7.0 mg/kg for a healthy adult, with an absolute maximum of 500 mg per appointment. A standard 1.7 mL cartridge of 2% lidocaine contains 34 mg. For a 70 kg patient, the weight-based limit is 490 mg, which equates to approximately 14 cartridges.

How many mg of articaine are in one dental cartridge?

One 1.7 mL dental cartridge of 4% articaine contains 68 mg of articaine. The calculation is straightforward: a 4% concentration means 40 mg per mL, and 40 mg/mL × 1.7 mL = 68 mg per cartridge. If you are using 1.8 mL cartridges, the amount is 72 mg per cartridge.

What is the maximum epinephrine dose for a cardiac patient?

The maximum recommended dose of epinephrine for a patient with clinically significant cardiovascular disease is 40 micrograms (0.04 mg) per appointment. This equates to approximately 2 cartridges of 1:100,000 epinephrine or about 1 cartridge of 1:50,000 epinephrine (based on 1.8 mL cartridge volumes). The healthy adult limit is 200 micrograms. Always consult the patient’s physician when there is uncertainty about cardiac risk.

Are pediatric local anesthetic doses the same as adult doses?

No. Pediatric doses are strictly weight-based and frequently use lower mg/kg values than adult doses. For example, lidocaine’s pediatric MRD is 4.4 mg/kg (versus 7.0 mg/kg with epi in adults), and mepivacaine’s pediatric MRD is 4.4 mg/kg (versus 6.6 mg/kg in adults). Some agents also carry age restrictions: articaine is recommended only for children age 4 and older, and bupivacaine for age 12 and older. Always calculate doses based on the child’s actual body weight and use the AAPD-recommended MRD values.

References

  1. Malamed SF. Handbook of Local Anesthesia. 7th Ed. St. Louis, MO: Mosby/Elsevier; 2019.
  2. American Academy of Pediatric Dentistry (AAPD). Best Practice: Use of Local Anesthesia for Pediatric Dental Patients. The Reference Manual of Pediatric Dentistry. 2023 Revision.