alamast
Alamast (Pemirolast Potassium) is a medication used to treat Allergic Conjunctivitis.
Pemirolast Potassium · by Santen
Key facts
- Active ingredient
- Pemirolast Potassium
- Form
- Drops
- Strength
- Pemirolast Potassium 0.1%
- Type
- Prescription (Rx)
- Brand or generic
- Brand-name
- May treat
- allergic conjunctivitis
- Manufacturer
- Santen
- FDA application
- NDA021079
- Availability
- Discontinued (per FDA)
May treat (source: NIH RxClass)
Dosage forms
Drops
The forms currently marketed in the U.S., per the FDA National Drug Code Directory.
Ways to save
Ask for the generic
Same active ingredient, far cheaper. Is there a generic? →
Request a 90-day supply
Bulk fills usually lower the per-dose price vs monthly refills.
Use copay cards
Manufacturer copay cards & patient-assistance programs — especially for brand drugs.
Compare alternatives
A same-class option may cost less. See alternatives →
Frequently asked questions
- What does Alamast treat?
- Alamast (Pemirolast Potassium) may be used to treat allergic conjunctivitis, based on NIH RxClass drug-classification data (conditions a drug may treat — not a verbatim copy of the FDA-approved label). This is general reference, not medical advice.
- Is there a coupon or discount for Alamast?
- pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Alamast. To pay less, ask your prescriber or pharmacist whether a generic equivalent exists, check the manufacturer's copay/savings card and patient-assistance program, and compare a pharmacy discount card against your insurance copay. Prices vary by pharmacy, insurance, and location, so always confirm at the counter. This is general reference, not medical or financial advice.
- Who makes Alamast?
- Alamast is marketed by Santen. You can see Santen's full profile, rating, and other products on pharmaranks.
- Is Alamast a brand-name or generic drug?
- Alamast is a brand-name product with the active ingredient Pemirolast Potassium.
- Is Alamast available over the counter?
- No. Alamast is a prescription (Rx) medication in the US — you need a prescription from a licensed clinician (in person or via telehealth); it isn't sold over the counter. For some conditions there are OTC alternatives — ask your pharmacist.
- What forms does Alamast come in?
- Alamast is currently marketed as drops, per the FDA's National Drug Code Directory.
- Is Alamast FDA-registered?
- Alamast is on record with the U.S. FDA under application number NDA021079. You can verify this on its official FDA label.
Information is sourced from public FDA regulatory data. Provided for general reference only — not medical advice. Always consult a licensed professional and the current prescribing information.
What people report to the FDA about PEMIROLAST POTASSIUM
The FDA Adverse Event Reporting System (FAERS) collects reports from patients and clinicians. It holds 21 reports naming PEMIROLAST POTASSIUM — the active ingredient in Alamast, and the FDA flagged 100% of those reports as serious. The effects reported most often — leaving out reports about overdose, misuse or the condition being treated, which dominate the raw list for common medicines:
- pyrexia4 reports
- liver disorder3 reports
- weight decreased3 reports
- abdominal pain2 reports
- asthenia2 reports
- cardiac failure2 reports
- convulsion2 reports
- fatigue2 reports
Read these as a signal, not a rate. A report does not mean PEMIROLAST POTASSIUM caused the effect — anyone can file one, and many describe people taking several medicines for several conditions. Crucially there is no denominator: FAERS does not record how many people took the drug, so these counts cannot be turned into “X% of patients” — a bigger number often just means a more widely used or more talked-about drug. Duplicates exist, and publicity drives reporting. For what is actually established, read the FDA label.
Source: openFDA drug/event (FAERS), retrieved September 25, 2026.
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