Tetrahydrozoline is a derivative of imidazoline, which is found in over-the counter-eye drops and nasal sprays. Other derivatives include naphazoline, oxymetazoline, and xylometazoline. Poisoning can result from an overdose.

• Tetrahydrozoline

• Tetrahydrozoline
• Tyzine Pediatric Drops
• Tyzine
• Eyesine
• Murine Tears Plus
• Optigene 3
• Geneye
• Visine Original
• Visine Advanced Relief

Note: This list may not be all-inclusive.

• Low temperature
• Difficulty breathing
• No breathing
• Constricted or dilated pupils
• Blurred vision
• Blue lips and fingernails
• Nausea and vomiting
• Rapid heartbeat
• Elevated blood pressure (initially)
• Low blood pressure (later)
• Nervousness
• Irritability
• Coma
• Headache
• Tremors
• Seizures

DO NOT INDUCE VOMITING UNLESS INSTRUCTED TO DO SO BY POISON CONTROL OR BY A PHYSICIAN.

Determine the following information:

• The patient's age, weight, and condition
• The name of the product (ingredients and strengths if known)
• The time it was swallowed
• The amount swallowed

They will instruct you if it is necessary to take the patient to the hospital. See Poison Control Centers for telephone numbers and addresses. Take the container with you to the emergency room.

Some or all of the following procedures may be performed:

• Inducing vomiting
• Administering activated charcoal
• Administering a laxative
• Gastric lavage
• Administering artificial respiration if necessary
• Maintaining adequate respiration rate
• Treating the symptoms

Survival past 24 hours is usually a good sign that recovery will follow.