May 29, 2017
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Miostat Patient Information Including Side Effects

Brand Names: Carbachol Ophthalmic, Isopto Carbachol, Miostat

Generic Name: carbachol ophthalmic (Pronunciation: KAR ba kall)

What is carbachol ophthalmic (Miostat)?

Carbachol lowers pressure in the eye by increasing the amount of fluid that drains from the eye.

Carbachol ophthalmic (for the eye) is used to treat glaucoma.

Carbachol ophthalmic may also be used for purposes not listed in this medication guide.

What are the possible side effects of carbachol ophthalmic (Miostat)?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have a serious side effect such as:

  • vision problems, seeing "floaters" in your vision;
  • feeling like you might pass out;
  • fast or slow heartbeats;
  • wheezing, trouble breathing; or
  • severe burning, stinging, or eye irritation after using the eye drops;

Less serious side effects may include:

  • headache;
  • stomach cramps, vomiting;
  • diarrhea;
  • mild eye irritation; or
  • increased sweating or urination.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Read the Miostat (carbachol intraocular solution) Side Effects Center for a complete guide to possible side effects

What is the most important information I should know about carbachol ophthalmic (Miostat)?

You should not use carbachol if you are allergic to it, or if you have swelling of your iris (the colored part of your eye).

Before using this medication, tell your doctor if you have had a recent eye injury, heart failure or recent heart attack, high or low blood pressure, asthma, a stomach ulcer, an overactive thyroid, urination problems, Parkinson's disease, if you have had a retinal tear, if you are nearsighted, or if you have had cataract surgery.

Do not allow the tip of the dropper to touch any surface, including your 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.

This medication may cause blurred vision and may impair your thinking or reactions. Be careful if you drive or do anything that requires you to be alert and able to see clearly.

Do not use this medication while wearing contact lenses. Carbachol ophthalmic may contain a preservative that can discolor soft contact lenses. Wait at least 15 minutes after using carbachol before putting in your contact lenses.

Call your doctor at once if you have vision problems, seeing "floaters" in your vision, or severe burning, stinging, or if you have eye irritation after using the eye drops.

Side Effects Centers

Additional Miostat Information

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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