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Istalol ophthalmic (for the eyes) is a beta-blocker that also reduces pressure inside the eye.

Istalol is used to treat open-angle glaucoma and other causes of high pressure inside the eye.

Use Istalol exactly as it was prescribed for you. Do not use the medication in larger amounts, or use it for longer than recommended by your doctor. Follow the instructions on your prescription label.

Wash your hands before using Istalol eye drops. Do not use Istalol while you are wearing contact lenses. Istalol may contain a preservative that can be absorbed by soft contact lenses. Wait at least 15 minutes after using Istalol before putting your contact lenses in.

To apply the eye drops:

Tilt your head back slightly and pull down your lower eyelid. Hold the dropper above the eye with the dropper tip down. Look up and away from the dropper as you squeeze out a drop, then close your eye.

Gently press your finger to the inside corner of the eye (near your nose) for about 1 minute to keep the liquid from draining into your tear duct. If you use more than one drop in the same eye, wait about 5 minutes before putting in the next drop.

Do not allow the dropper tip to touch any surface, including the eyes or hands. If the dropper becomes contaminated it could cause an infection in your eye, which can lead to vision loss or serious damage to the eye.

Do not use Istalol eye drops if the liquid has changed colors or has particles in it. Call your doctor for a new prescription.