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Pronunciation |
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(TET
ra
kane) |
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U.S. Brand
Names |
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Pontocaine® |
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Generic
Available |
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Yes |
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Canadian Brand
Names |
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Ametop™ |
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Synonyms |
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Amethocaine Hydrochloride; Tetracaine Hydrochloride |
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Pharmacological Index |
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Local Anesthetic |
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Use |
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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 |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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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 |
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Warnings/Precautions |
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No pediatric dosage recommendations; ophthalmic preparations may delay wound
healing; use with caution in patients with cardiac disease and
hyperthyroidism |
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Adverse
Reactions |
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1% to 10%: Dermatologic: Contact dermatitis, burning, stinging, angioedema
<1%: Tenderness, urticaria, urethritis, methemoglobinemia in infants
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Overdosage/Toxicology |
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Maximum dose is 50 mg |
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Drug
Interactions |
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Decreased effect: Aminosalicylic acid, sulfonamides effects may be
antagonized |
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Stability |
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Store solution in the refrigerator |
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Mechanism of
Action |
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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 |
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Pharmacodynamics/Kinetics |
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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 |
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Usual Dosage |
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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
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Administration |
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Before injection, withdraw syringe plunger to make sure injection is not into
vein or artery |
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Mental Health: Effects
on Mental Status |
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None reported |
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Mental Health:
Effects on Psychiatric
Treatment |
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None reported |
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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |
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Dental Health:
Effects on Dental Treatment |
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No effects or complications reported |
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Patient
Information |
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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). |
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Nursing
Implications |
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Store the solutions in the refrigerator; before injection, withdraw syringe
plunger to make sure injection is not into vein or artery |
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Dosage Forms |
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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) |
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References |
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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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