Tetryzoline

An article about Tetryzoline, a medication used to relieve redness in the eyes.

Tetryzoline

Chemical structure of Tetryzoline

Tetryzoline, also known as tetrahydrozoline, is a medication primarily used to relieve redness in the eyes caused by minor irritations. It is a vasoconstrictor, which means it works by narrowing the blood vessels in the eye, reducing redness and swelling.

Mechanism of Action

Tetryzoline is an imidazoline derivative that acts as an alpha-adrenergic receptor agonist. By stimulating these receptors, tetryzoline causes vasoconstriction of the blood vessels in the conjunctiva, leading to decreased blood flow and reduced redness.

Uses

Tetryzoline is commonly found in over-the-counter ophthalmic solutions used to relieve eye redness due to minor irritations such as exposure to wind, sun, or smoke. It is also used in some nasal decongestant sprays.

Side Effects

Common side effects of tetryzoline include:

• Temporary stinging or burning of the eyes
• Blurred vision
• Increased redness or irritation of the eyes

In rare cases, systemic absorption can lead to more serious side effects such as:

• Hypertension
• Tachycardia
• Headache

Precautions

Tetryzoline should be used with caution in individuals with:

• Glaucoma
• Hypertension
• Heart disease

It is important to follow the recommended dosage and not to use the product for more than 72 hours without consulting a healthcare professional.

Related Pages

• Vasoconstrictor
• Alpha-adrenergic receptor
• Ophthalmic solution