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trusopt

Trusopt (Dorzolamide Hydrochloride) is a carbonic anhydrase inhibitor used to treat Open-Angle Glaucoma.

Dorzolamide Hydrochloride · by Msd Sub Merck

Available as a generic: Dorzolamide Hydrochloride

Not yet rated· sourced from the FDA label
Rated against independent regulatory sources·Last updated June 7, 2026·How we rate
Verified againstopenFDANIH DailyMedRxClass

Key facts

Active ingredient
Dorzolamide Hydrochloride
Form
Drops
Strength
Dorzolamide Hydrochloride EQ 2% Base **Federal Register Determination That Product was not Discontinued or Withdrawn for Safety or Effectiveness reasons**
Type
Prescription (Rx)
Brand or generic
Brand-name
Manufacturer
Msd Sub Merck
What the pharmacy pays
~$0.87 per ml — not your price
FDA application
NDA020408
Availability
Discontinued (per FDA)

Drug class

How this class works, per Carbonic Anhydrase Inhibitors - StatPearls - NCBI Bookshelf.

May treat (source: NIH RxClass)

See how Trusopt ranks — best-rated carbonic anhydrase inhibitor for:

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 Trusopt treat?
Trusopt (Dorzolamide Hydrochloride) may be used to treat open-angle glaucoma, 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.
How does Trusopt work?
Trusopt is a carbonic anhydrase inhibitor. These block the enzyme carbonic anhydrase, which normally helps the body recycle bicarbonate. In the kidneys this flushes more bicarbonate, sodium, and water into the urine, and in the eye it cuts production of the fluid that builds up pressure, which is why they treat conditions like glaucoma and altitude sickness.
How much does Trusopt cost?
Nobody can tell you what you will pay — your price is set by your insurer's formulary, your deductible and the pharmacy's markup, and none of those are published. What IS published is what the pharmacy paid to acquire it: about $0.87 per ml, per the CMS NADAC survey. Treat that as the floor, not the quote — ask the pharmacist for the cash price as well as your copay, because for cheap generics the cash price often wins.
Is there a coupon or discount for Trusopt?
pharmaranks is an independent ratings site, not a pharmacy — we don't issue coupons or sell Trusopt. 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 Trusopt?
Trusopt is marketed by Msd Sub Merck. You can see Msd Sub Merck's full profile, rating, and other products on pharmaranks.
Is Trusopt a brand-name or generic drug?
Trusopt is a brand-name product with the active ingredient Dorzolamide Hydrochloride. Lower-cost generic equivalents containing Dorzolamide Hydrochloride are available — ask your pharmacist.
Is Trusopt available over the counter?
No. Trusopt 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 Trusopt come in?
Trusopt is currently marketed as drops, per the FDA's National Drug Code Directory.
What class of drug is Trusopt?
Trusopt is classified as carbonic anhydrase inhibitor, per the FDA's Established Pharmacologic Class.
Is Trusopt FDA-registered?
Trusopt is on record with the U.S. FDA under application number NDA020408. 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.

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