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Clarine Opht

Generic Name: TETRAHYDROZOLINE - OPHTHALMIC
Pronounced: (TEH-truh-hi-DROZE-oh-leen)

Clarine Opht Side Effects

Stinging/redness in the eye, widened pupils, or blurred vision may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects.

Tell your doctor immediately if any of these unlikely but serious side effects occur:

  • shakiness (tremor)
  • fast/pounding/ irregular heartbeat
  • headache
  • sweating
  • weakness
  • nervousness


Stop using this medication and tell your doctor immediately if any of these rare but very serious side effects occur:

  • eye pain
  • worsening redness/itching/swelling in or around the eyes
  • other vision problems


A very serious allergic reaction to this drug is rare. However, seek immediate medical attention if you notice any symptoms of a serious allergic reaction, including:

  • rash
  • itching/swelling (especially of the face/tongue/throat)
  • severe dizziness
  • trouble breathing


This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Clarine Opht Precautions

Before using tetrahydrozoline, tell your doctor or pharmacist if you are allergic to it; or to preservatives (e.g., benzalkonium chloride); or if you have any other allergies.

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.

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