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Look Up > Drugs > Tetrahydrozoline
Tetrahydrozoline
Pronunciation
U.S. Brand Names
Generic Available
Synonyms
Pharmacological Index
Use
Pregnancy Risk Factor
Adverse Reactions
Drug Interactions
Stability
Mechanism of Action
Pharmacodynamics/Kinetics
Usual Dosage
Dental Health: Local Anesthetic/Vasoconstrictor Precautions
Dental Health: Effects on Dental Treatment
Patient Information
Nursing Implications
Dosage Forms

Pronunciation
(tet ra hye DROZ a leen)

U.S. Brand Names
Collyrium Fresh® Ophthalmic [OTC]; Eyesine® Ophthalmic [OTC]; Geneye® Ophthalmic [OTC]; Mallazine® Eye Drops [OTC]; Murine® Plus Ophthalmic [OTC]; Optigene® Ophthalmic [OTC]; Tetrasine® Extra Ophthalmic [OTC]; Tetrasine® Ophthalmic [OTC]; Tyzine® Nasal; Visine® Extra Ophthalmic [OTC]

Generic Available

Yes


Synonyms
Tetrahydrozoline Hydrochloride; Tetryzoline

Pharmacological Index

Adrenergic Agonist Agent; Ophthalmic Agent, Vasoconstrictor


Use

Symptomatic relief of nasal congestion and conjunctival congestion


Pregnancy Risk Factor

C


Adverse Reactions

>10%:

Local: Transient stinging

Respiratory: Sneezing

1% to 10%:

Cardiovascular: Tachycardia, palpitations, hypertension, heart rate

Central nervous system: Headache

Neuromuscular & skeletal: Tremor

Ocular: Blurred vision


Drug Interactions

Increased toxicity: MAO inhibitors can cause an exaggerated adrenergic response if taken concurrently or within 21 days of discontinuing MAO inhibitor; beta-blockers can cause hypertensive episodes and increased risk of intracranial hemorrhage; anesthetics


Stability

Do not use if solution changes color or becomes cloudy


Mechanism of Action

Stimulates alpha-adrenergic receptors in the arterioles of the conjunctiva and the nasal mucosa to produce vasoconstriction


Pharmacodynamics/Kinetics

Onset of decongestant effect: Intranasal: Within 4-8 hours

Duration: Ophthalmic vasoconstriction: 2-3 hours


Usual Dosage

Nasal congestion: Intranasal:

Children 2-6 years: Instill 2-3 drops of 0.05% solution every 4-6 hours as needed, no more frequent than every 3 hours

Children >6 years and Adults: Instill 2-4 drops or 3-4 sprays of 0.1% solution every 3-4 hours as needed, no more frequent than every 3 hours

Conjunctival congestion: Ophthalmic: Adults: Instill 1-2 drops in each eye 2-4 times/day


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

Remove contact lenses before using in eye, do not use for more than 72 hours unless directed to do so; consult physician if changes in vision or visual acuity occur; do not exceed recommended dosage


Nursing Implications

Monitor blood pressure, heart rate, symptom response


Dosage Forms

Solution, as hydrochloride:

Ophthalmic: 0.05% (15 mL)


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