Bimatoprost

About Bimatoprost

Bimatoprost is a prostaglandin analog. As Lumigan (bimatoprost ophthalmic solution 0.01 percent), the label approves it to reduce elevated intraocular pressure in people with open angle glaucoma or ocular hypertension. The dose is one drop in the affected eye or eyes once daily in the evening, and no more often, because dosing more than once a day may reduce the pressure lowering effect. Pressure starts to fall about 4 hours after the first dose, with the peak effect at about 8 to 12 hours. Use below age 16 is not recommended because of concern about increased pigmentation with long term use. As Latisse (bimatoprost ophthalmic solution 0.03 percent), the label approves it to treat hypotrichosis of the eyelashes, meaning too few or too short lashes, by increasing their length, thickness and darkness. One drop goes on a sterile disposable applicator and is brushed once nightly along the skin of the upper eyelid margin at the base of the lashes, with a new applicator for the other eye; it is never applied to the lower lid, and extra applications do not grow lashes faster.

There is no boxed warning. Neither product may be used by anyone hypersensitive to bimatoprost or any ingredient. Both labels warn that brown pigmentation of the iris can increase and is likely permanent, and that the eyelid skin and lashes can darken, which the Latisse label says is reversible in most people after stopping and the Lumigan label says has been reported to be reversible in some. Lumigan can make the lashes longer, thicker and more numerous, and Latisse can cause hair growth where the solution repeatedly touches skin outside the lid margin, so excess is blotted off. Both labels advise caution in active intraocular inflammation such as uveitis and in people at risk for macular edema, including those without a natural lens or with a torn posterior lens capsule. The Lumigan label also warns that bacterial keratitis has been reported with contaminated multiple dose eye drop bottles. The most common side effect of Lumigan is eye redness (conjunctival hyperemia); for Latisse the common effects are eye itching, eye redness, darkening of the eyelid skin, eye irritation, dry eye and eyelid redness.

What is distinctive is that one molecule is sold as two separate products with different strengths, labels and uses, and they are not interchangeable at the counter. The Latisse label warns that bimatoprost lowers eye pressure, so anyone already using Lumigan or another prostaglandin analog for eye pressure should talk to the prescriber before adding Latisse, because combining them may reduce the pressure lowering effect, and eye pressure should be monitored. Both solutions contain benzalkonium chloride, which soft contact lenses can absorb, so lenses come out before use and go back in 15 minutes later. The Lumigan label says to use it in pregnancy only if the potential benefit justifies the potential risk to the fetus. A separate bimatoprost product, Durysta, is an implant injected into the front chamber of the eye in a procedure rather than a drop used at home, and it is not covered here. Bimatoprost is not a controlled substance.

Taking Bimatoprost

How to take it

For glaucoma, wash your hands, tilt your head back, pull the lower lid down and squeeze one drop into the pocket once each evening without the tip touching your eye, then close the eye for two to three minutes and press gently on the inner corner. For eyelashes, remove makeup and contact lenses, put one drop on a new sterile applicator, brush it along the upper lid margin at the base of the lashes, blot any excess, and use a fresh applicator for the other eye. Take out soft contact lenses first and wait 15 minutes before putting them back.

If you miss a dose

Use the missed dose as soon as you remember, unless it is almost time for the next one; then skip it and go back to your usual schedule. Do not use a double dose or extra applications.

Storage

Keep the bottle tightly closed in its original container at 2 to 25 degrees C (36 to 77 degrees F), away from excess heat and moisture and out of reach of children. Lumigan can be used until the expiration date on the bottle after opening.

Interactions to know about

Space other eye drops at least five minutes apart from bimatoprost. Using the eyelash solution together with Lumigan or another prostaglandin analog for eye pressure may reduce the pressure lowering effect, so tell the eye doctor about both.

This summarizes the official prescribing information. Your prescriber’s and pharmacist’s instructions, and the leaflet that comes with your medicine, take priority.

Why the cash price for Bimatoprost differs from pharmacy to pharmacy

Quotes depend first on which product the prescription is for. The AB rated generics listed for the 0.01 percent glaucoma drop were approved in 2025, so only a few makers supply it, and some pharmacies still stock only the Lumigan brand, which is priced as a brand. Bottle size matters too: the drop comes in 2.5 mL, 5 mL and 7.5 mL bottles, and a quote for one size is not the same as a quote for another.

The 0.03 percent eyelash solution is a different product with its own generics rated AT to Latisse, sold with a set number of applicators per bottle, so a quote covers the bottle and its applicators together. Because the two strengths have different labels and uses, a pharmacy cannot swap one for the other, and a prescription for the discontinued Lumigan 0.03 percent drop has to be clarified with the prescriber. On a small bottle, the dispensing fee is a noticeable share of the quote.

Ways to pay less for Bimatoprost without insurance

• For glaucoma, ask the prescriber to write bimatoprost 0.01 percent ophthalmic solution and allow generic substitution, then ask each pharmacy whether it stocks an AB rated generic.
• Once the eye pressure is stable, ask the prescriber for the largest bottle size or a longer supply, and compare quotes for the same bottle size.
• For eyelashes, ask for generic bimatoprost 0.03 percent solution rated AT to Latisse, and confirm the bottle comes with its sterile applicators.
• If you want to stay on a brand, ask the maker whether its savings program applies to someone paying cash, since many require commercial insurance.
• Upload the prescription to Script Unlock so licensed pharmacies can quote their cash price. You pay the pharmacy directly.

Questions to ask your pharmacist about Bimatoprost

1. 1.Is my bottle the 0.01 percent glaucoma drop or the 0.03 percent eyelash solution, and is it a generic?
2. 2.How long should I wait between my bimatoprost and my other eye drops?
3. 3.I already use drops for eye pressure; is it safe for me to use the eyelash solution too?
4. 4.Can this change the color of my eyes or the skin around them, and is that permanent?

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