Indications 

Tetrahydrozoline is a sympathomimetic amine that functions as a decongestant to alleviate redness of the eyes associated with minor eye irritations like smoke, dust, swimming or smog.  

This drug works by constricting the blood vessels in the eye, providing temporary relief. Certain brands of tetrahydrozoline eye drops may contain lubricants to safeguard the eyes from further irritation and dryness. 

Uses and Dosage 

Follow all directions on the product packaging or as directed by your doctor. If you have any questions or concerns, seek advice from your doctor or pharmacist. 

Prior to applying the eye drops, wash your hands thoroughly. To prevent contamination, do not touch the dropper tip or allow it to touch your eye or any other surface. If you wear contact lenses, remove them before using the eye drops. Wait at least 10 minutes after administering the medication before reinserting contact lenses. 

Before using, inspect the product visually to ensure safety. Do not use the eye drops if the liquid has changed color or is cloudy. Keep the medication out of the reach of children and pets. 

Use the medication up to 4 times a day, or as directed by your doctor, in the affected eye(s).  

Tilt your head back, look upward, and gently pull down the lower eyelid to form a pouch. Hold the dropper directly over the eye and dispense 1 drop into the pouch. Look downward and gently close your eyes for 1 to 2 minutes, while applying gentle pressure to the corner of your eye near your nose.  

Avoid blinking or rubbing the eye. Repeat these steps if you require more than 1 drop and for the other eye if directed. 

Do not rinse the dropper. Always replace the dropper cap securely after each use. If you are using other types of eye medication, such as drops or ointments, wait at least 5 minutes before applying another medication. Administer eye drops before eye ointments to ensure the eye drops can be absorbed. 

Using this medication excessively may cause increased eye redness, known as a rebound effect, when the medication wears off. If this occurs, consult your doctor. Do not use this medication for longer than 3 to 4 days at a time. 

If your condition persists or worsens after 72 hours, or if you suspect a serious medical problem, stop using the medication and seek immediate medical attention. 

Side Effects 

Allergic Reaction 

• Hives 
• Difficulty breathing 
• Swelling of face, lips, tongue, or throat 

Serious Side Effects  

• Ongoing or worsening eye redness 
• Eye pain 
• Changes in vision 
• Chest pain, fast or uneven heart rate 
• Severe headache, buzzing in your ears, anxiety, confusion, or feeling short of breath 

If you experience any of these side effects, stop using Visine and call your doctor immediately. 

Common Side Effects 

• Mild burning or stinging of the eye 
• Blurred vision, watery eyes 
• Dilated pupils 

Cautions 

Before using tetrahydrozoline, inform your healthcare provider or pharmacist about any history of allergies or sensitivities you have. The product may contain inactive ingredients such as benzalkonium chloride, which can cause allergic reactions or other issues.  

Before using this medication, inform your doctor or pharmacist about your medical history, particularly if you have had glaucoma, heart issues such as chest pain or heart attack, high blood pressure, diabetes, eye injury or infection, or overactive thyroid (hyperthyroidism). 

Following the application of this medication, your vision may become temporarily blurred. Avoid driving, operating machinery, or performing any task requiring clear vision until safe to do so. 

During pregnancy, this medication should only be used when deemed necessary. Discuss the potential risks and benefits with your doctor.