Tetrahydrozoline-ophth

Before using tetrahydrozoline, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients (such as preservatives like benzalkonium chloride), which can cause allergic reactions or other problems. Talk to your pharmacist for more details.Before using this medication, tell your doctor or pharmacist your medical history, especially of: glaucoma, heart problems (e.g., heart attack, chest pain), high blood pressure, diabetes, eye infection/injury, overactive thyroid (hyperthyroidism).This drug may cause temporary blurred vision after you apply it. Do not drive, use machinery, or do any activity that requires clear vision until you are sure you can perform such activities safely.Caution is advised when using this product in children because they may be more sensitive to the effects of the product, especially eye irritation.During pregnancy, this medication should be used only when clearly needed. Discuss the risks and benefits with your doctor.It is not known whether this drug passes into breast milk. Consult your doctor before breast-feeding.

This medicine may be harmful if swallowed. If swallowing or overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center. Symptoms of overdose may include drowsiness, severe sweating, decreased body temperature, slow/shallow breathing.

If your symptoms are due to allergies, avoid allergens that may be the cause of your symptoms. Some common causes of allergies include pollen, grasses, weeds, dust mites, and pet dander.