The below information on Alamast has been taken from official FDA sources, but we cannot guarantee it's accuracy. Please use this site for educational purposes only. This site does not replace a proper discussion with your doctor.

    Brand Name:Alamast
    Generic:Pemirolast Potassium
This drug was approved by the FDA in one form or another on:
1999-09-24 ,
This drug is made in one form or another by the following companies:
Santen Inc.
This drug is available in the following forms:
Opthalmic Solutions
View the actual FDA approved label for this drug at the following links:

About Alamast

Alamast is used to prevent itching of the eye caused by allergies. Alamast should not be used to treat contact lens-related problems. You may notice decreased itching within a few days, but frequently longer treatment (up to four weeks) is necessary.

Precautions for Alamast

  • Do not wear contact lenses if your eyes are red.
  • If you wear soft contact lenses and your eyes are not red, remove the lenses before using Alamast. Wait at least 10 minutes after using Alamast before putting in your contact lenses, because Alamast contains a preservative that may be absorbed by the lens.
  • Do not allow the tip of the dropper to touch the eyelids or surrounding areas, because this may contaminate the medicine.
  • Wait at least 10 minutes after using Alamast before putting in your contact lenses.
  • Keep the bottle tightly closed when not in use.

Side Effects of Alamast

The side effects of Alamast are generally mild. Some possible side effects are:

  • Headache
  • Stuffy nose
  • Cold or flu symptoms
  • Temporary burning or stinging of the eye when drops are first put in.
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Recent Forum Posts on Alamast


I like the product a lot but I think it is so expensive it cost about $80.00 and I can't afford it .I have no job right now and no insurance .

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