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Tetracaine
Pronunciation
U.S. Brand Names
Generic Available
Canadian Brand Names
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Contraindications
Warnings/Precautions
Adverse Reactions
Overdosage/Toxicology
Drug Interactions
Stability
Mechanism of Action
Pharmacodynamics/Kinetics
Usual Dosage
Administration
Mental Health: Effects on Mental Status
Mental Health: Effects on Psychiatric Treatment
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Nursing Implications
Dosage Forms
References

Pronunciation
(TET ra kane)

U.S. Brand Names
Pontocaine®

Generic Available

Yes


Canadian Brand Names
Ametop™

Synonyms
Amethocaine Hydrochloride; Tetracaine Hydrochloride

Pharmacological Index

Local Anesthetic


Use

Dental: Ester-type local anesthetic topically applied to nose and throat for various diagnostic procedures

Medical: Spinal anesthesia; local anesthesia in the eye for various diagnostic and examination purposes; topically applied to nose and throat for various diagnostic procedures; approximately 10 times more potent than procaine


Pregnancy Risk Factor

C


Contraindications

Hypersensitivity to tetracaine or any component; ophthalmic secondary bacterial infection, patients with liver disease, CNS disease, meningitis (if used for epidural or spinal anesthesia), myasthenia gravis


Warnings/Precautions

No pediatric dosage recommendations; ophthalmic preparations may delay wound healing; use with caution in patients with cardiac disease and hyperthyroidism


Adverse Reactions

1% to 10%: Dermatologic: Contact dermatitis, burning, stinging, angioedema

<1%: Tenderness, urticaria, urethritis, methemoglobinemia in infants


Overdosage/Toxicology

Maximum dose is 50 mg


Drug Interactions

Decreased effect: Aminosalicylic acid, sulfonamides effects may be antagonized


Stability

Store solution in the refrigerator


Mechanism of Action

Ester local anesthetic blocks both the initiation and conduction of nerve impulses by decreasing the neuronal membrane's permeability to sodium ions, which results in inhibition of depolarization with resultant blockade of conduction


Pharmacodynamics/Kinetics

Onset of anesthetic effect:

Ophthalmic instillation: Within 60 seconds

Topical or spinal injection: Within 3-8 minutes after applied to mucous membranes or when saddle block administered for spinal anesthesia

Duration of action: Topical: 1.5-3 hours

Metabolism: By the liver

Elimination: Renal


Usual Dosage

Maximum adult dose: 50 mg

Adults:

Ophthalmic (not for prolonged use):

Ointment: Apply 1/2 " to 1" to lower conjunctival fornix

Solution: Instill 1-2 drops

Spinal anesthesia:

High, medium, low, and saddle blocks: 0.2% to 0.3% solution

Prolonged (2-3 hours): 1% solution

Subarachnoid injection: 5-20 mg

Saddle block: 2-5 mg; a 1% solution should be diluted with equal volume of CSF before administration

Topical mucous membranes (2% solution): Apply as needed; dose should not exceed 20 mg

Topical for skin: Ointment/cream: Apply to affected areas as needed


Administration

Before injection, withdraw syringe plunger to make sure injection is not into vein or artery


Mental Health: Effects on Mental Status

None reported


Mental Health: Effects on Psychiatric Treatment

None reported


Dental Health: Local Anesthetic/Vasoconstrictor Precautions

No information available to require special precautions


Dental Health: Effects on Dental Treatment

No effects or complications reported


Patient Information

Topical or ophthalmic anesthesia effects may last for some time following use; you will need to observe appropriate safety precautions to prevent injury (eg, do not rub or touch your eye, scratch your nose, or eat or drink (depending on use) until all sensation returns).


Nursing Implications

Store the solutions in the refrigerator; before injection, withdraw syringe plunger to make sure injection is not into vein or artery


Dosage Forms

Cream, as hydrochloride: 1% (28 g)

Injection, as hydrochloride: 1% [10 mg/mL] (2 mL)

Injection, as hydrochloride, with dextrose 6%: 0.2% [2 mg/mL] (2 mL); 0.3% [3 mg/mL] (5 mL)

Ointment, as hydrochloride:

Ophthalmic: 0.5% [5 mg/mL] (3.75 g)

Topical: 0.5% [5 mg/mL] (28 g)

Powder for injection, as hydrochloride: 20 mg

Solution, as hydrochloride:

Ophthalmic: 0.5% [5 mg/mL] (1 mL, 2 mL, 15 mL, 59 mL)

Topical: 2% [20 mg/mL] (30 mL, 118 mL)


References

Bartfield JM, Lee FS, Raccio-Robak N, et al, "Topical Tetracaine Attenuates the Pain of Infiltration of Buffered Lidocaine," Acad Emerg Med, 1996, 3(11):1001-5.

Bonadio WA, "Safe and Effective Method for Application of Tetracaine, Adrenaline, and Cocaine to Oral Lacerations," Ann Emerg Med, 1996, 28(4):396-8.

Duffin RM and Olson RJ, "Tetracaine Toxicity," Ann Ophthalmol, 1984, 16(9):836, 838.

Garfield JM, Andriole GL, Vetto JL, et al, "Prolonged Diabetes Insipidus Subsequent to an Episode of Chemical Meningitis," Anesthesiology, 1986, 64(2):253-4.

Grant SA and Hoffman RS, "Use of Tetracain, Epinephrine, and Cocaine as a Topical Anesthetic in the Emergency Department," Ann Emerg Med, 1992, 21(8):987-97.

Kintner JC, Grossniklaus HE, Lass JH, et al, "Infectious Crystalline Keratopathy Associated With Topical Anesthetic Abuse," Cornea, 1990, 9(1):77-80.

Skidmore RA, Patterson JD, and Tomsick RS, "Local Anesthetics," Dermatol Surg, 1996, 22(6):511-22.

van Kan JH, Egberts AC, Rijnvos WP, et al, "Tetracaine Versus Lidocaine-Prilocaine for Preventing Venipuncture-Induced Pain in Children," Am J Health Syst Pharm, 1997, 54(4):388-92.


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