Drug information of unoprostone


Drug group:

Unoprostone isopropyl is a prostaglandin analogue. Ophthalmic Solution 0.15% is a synthetic docosanoid. Unoprostone isopropyl has the chemical name isopropyl (+)-(Z)-7-[(1R,2R,3R,5S)-3,5 dihydroxy-2-(3-oxodecyl)cyclopentyl]-5-heptenoate. The main indication of Unoprostane is treatment of glucoma
For the lowering of intraocular pressure in patients with open-angle glaucoma or ocular hypertension who are intolerant of other intraocular pressure lowering medications or insufficiently responsive (failed to achieve target IOP determined after multiple measurements over time) to another intraocular pressure lowering medication.

Mechanism of effect

Unoprostone is believed to reduce elevated intraocular pressure (IOP), by increasing the outflow of aqueous humor. The mechanism of action for the IOP-lowering effect of unoprostone is controversial. Early studies showed that unoprostone increases aqueous humor outflow through the uveoscleral pathway similar to the 20-carbon prostaglandin analogs, such as latanoprost.8 More recent evidence, however, shows that it may work, at least in part, through stimulation of Ca2+-activated BK and CIC-2 type channels, leading to increased trabecular meshwork outflow.


Unoprostone will begin to reduce IOP 30 minutes after ocular instillation.


Absorbed: through cornea and conjunctival epithelium; minimal systemic absorption

Half-Life: 14 min

Peak Plasma: <1.5 ng/mL

Metabolism: hydrolyzed by esterases to unoprostone free acid

Excretion: urinary (as metabolites)

Drug indications

increased ocular tension


1 gtt in affected eye(s) BID

Drug contraindications

Hypersensitivity to this drug


Increased pigmentation may occur due to increased melanin content in iris, eyelid periorbital tissues, and eyelashes

May exacerbated active intraocular inflammation (eg, uveitis)

Macular edema, including cystoid macular edema reported; caution in aphakic patients or pseudophakic patients with torn posterior lens capsule

Points of recommendation

May use with other topical ophthalmic drugs to lower IOP; if 2 drugs are used, separate administration by at least 5 minutes

Contains benzalkonium chloride, which may be absorbed by soft contact lenses; remove contact lenses before administration and wait at least 15 minutes after administration before reinserting contact lenses

Avoid touching eyelids or surrounding areas with dropper bottle tip to minimize contaminating dropper tip and solution

Pregnancy level


Breast feeding warning

 Unknown if distributed into human milk; use caution

Drug forms


Ask a Pharmacist

User's questions
    No comments yet.