Clinical data | |
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Trade names | Xalatan, others |
AHFS/Drugs.com | Monograph |
MedlinePlus | a697003 |
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Routes of administration | Topical eye drop |
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Pharmacokinetic data | |
Metabolism | Activation by ester hydrolysis, deactivation by beta oxidation |
Onset of action | 3–4 hours |
Elimination half-life | 17 minutes (plasma) |
Duration of action | ≥ 24 hours |
Excretion | Mainly via kidney |
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ECHA InfoCard | 100.162.178 |
Chemical and physical data | |
Formula | C26H40O5 |
Molar mass | 432.601 g·mol−1 |
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Latanoprost, sold under the brand name Xalatan among others, is a medication used to treat increased pressure inside the eye (intraocular pressure). [5] This includes ocular hypertension and open-angle glaucoma. [5] Latanaprost is applied as eye drops to the eyes. [5] Onset of effects is usually within four hours, and they last for up to a day. [5]
Common side effects include blurry vision, redness of the eye, itchiness, and darkening of the iris. [5] Latanoprost is in the prostaglandin analogue family of medications. [5] It works by increasing the outflow of aqueous fluid from the eyes through the uveoscleral tract. [6]
Latanoprost was approved for medical use in the United States and the European Union in 1996. [5] [3] It is on the World Health Organization's List of Essential Medicines. [7] Latanoprost is available as a generic medication. [8] In 2022, it was the 67th most commonly prescribed medication in the United States, with more than 9 million prescriptions. [9] [10] It is available as a fixed-dose combination with netarsudil as netarsudil/latanoprost and with timolol as latanoprost/timolol.
In the United States, latanoprost is indicated for the reduction of elevated intraocular pressure in people with open-angle glaucoma or ocular hypertension. [2]
In people with ocular hypertension (IOP ≥21 mm Hg) including open-angle glaucoma, treatment with latanoprost reduced IOP levels by 22 to 39% over 1 to 12 months’ treatment. Latanoprost is more effective than timolol 0.5% twice daily in 3 of 4 large (n = 163 to 267) randomised, double-blind trials. Latanoprost demonstrated a stable long-term IOP-lowering effect in 1- or 2-year continuations of these trials, with no sign of diminishing effect during prolonged treatment. [11]
Meta-analysis suggests that latanoprost is more effective than timolol in lowering intraocular pressure (IOP). However, it often causes iris pigmentation. While current[ when? ] evidence suggests that this pigmentation is benign, careful lifetime evaluation of patients is still justified. [12]
People who had elevated IOP despite iridotomy and/or iridectomy (including people of Asian descent), latanoprost was significantly more effective than timolol in two double-blind, monotherapy trials (8.2 and 8.8 mm Hg vs 5.2 and 5.7 mm Hg for latanoprost vs timolol at 12 and 2 weeks, respectively). [13]
Listed from most to least common: [14] [15]
Research suggests that wiping the eye with an absorbent pad after the administration of eye drops can result in shorter eyelashes and a lesser chance of hyperpigmentation in the eyelid, compared to not wiping off excess fluid. [17]
Interactions are similar to other prostaglandin analogs. Paradoxically, the concomitant use of latanoprost and bimatoprost or other prostaglandins may result in increased intraocular pressure. [2] Non-steroidal anti-inflammatory drugs (NSAIDs) can reduce or increase the effect of latanoprost. [14] [15]
Like other prostaglandin analogues, latanoprost acid is an analog of prostaglandin F2α that acts as a selective agonist at the prostaglandin F receptor. Prostaglandins increase the sclera's permeability to aqueous fluid. By giving latanoprorost, it increases prostaglandin's scleral activity, increasing outflow of aqueous fluid and lowering intraocular pressure. [14] [15] The outflow of aqueous fluid would reduce the intraocular pressure in the eye, reducing the likelihood of complications such as optic nerve damage and visual field loss. [2]
Latanoprost is absorbed well through the cornea. As an ester prodrug, it completely hydrolyses to the active latanoprost acid upon absorption to become biologically active. [2] Highest concentrations of the acid in the aqueous humour are reached two hours after application, lowering of intraocular pressure starts after 3 to 4 hours, with its highest effect found after 8 to 12 hours, and its effect still present for at least 24 hours. When latanoprost acid reaches the circulation, it is quickly metabolised in the liver by fatty acid beta oxidation to 1,2-dinor- and 1,2,3,4-tetranor-latanoprost acid; blood plasma half life is only 17 minutes. The metabolites are mainly excreted via the kidney, with 88% of the topical dose and 98% of an intravenous dose being recovered in the urine respectively. [14] [15]
The activation and deactivation pathway is analogous to the one of tafluprost (at least up to the tetranor-metabolite); [15] compare Tafluprost#Pharmacokinetics.
Latanoprost exhibits thermal and solar instability. The concentration of latanoprost stored at 50 °C will decrease by 10% every 8.25 days. When stored at 70 °C the concentration will decrease by 10% every 1.32 days. Ultraviolet light, for example in sunlight, causes rapid degradation of latanoprost. [18]
Latanoprost was approved for medical use in the United States and the European Union in 1996. [5] [3]
In September 2023, the Committee for Medicinal Products for Human Use of the European Medicines Agency adopted a positive opinion, recommending the granting of a marketing authorization for the medicinal product Catiolanze, intended for the reduction of elevated intraocular pressure in adults with open angle glaucoma or ocular hypertension and in children from four years and adolescents with elevated intraocular pressure and pediatric glaucoma. [3] The applicant for this medicinal product is Santen Oy. [3] Catiolanze was approved for medical use in the European Union in November 2023. [3] [4]
Latanoprost is sold under many brand names including Xalatan, [2] [19] Iyuzeh, [20] Xelpros, [21] and Catiolanze. [3]
In the US, Xalatan is marketed by Viatris after Upjohn was spun off from Pfizer. [22] [23] [24]
Glaucoma is a group of eye diseases that can lead to damage of the optic nerve. The optic nerve transmits visual information from the eye to the brain. Glaucoma may cause vision loss if left untreated. It has been called the "silent thief of sight" because the loss of vision usually occurs slowly over a long period of time. A major risk factor for glaucoma is increased pressure within the eye, known as intraocular pressure (IOP). It is associated with old age, a family history of glaucoma, and certain medical conditions or the use of some medications. The word glaucoma comes from the Ancient Greek word γλαυκός, meaning 'gleaming, blue-green, gray'.
Prostaglandin analogues are a class of drugs that bind to a prostaglandin receptor.
Intraocular pressure (IOP) is the fluid pressure inside the eye. Tonometry is the method eye care professionals use to determine this. IOP is an important aspect in the evaluation of patients at risk of glaucoma. Most tonometers are calibrated to measure pressure in millimeters of mercury (mmHg).
Betaxolol is a selective beta1 receptor blocker used in the treatment of hypertension and angina. It is also a adrenergic blocker with no partial agonist action and minimal membrane stabilizing activity. Being selective for beta1 receptors, it typically has fewer systemic side effects than non-selective beta-blockers, for example, not causing bronchospasm as timolol may. Betaxolol also shows greater affinity for beta1 receptors than metoprolol. In addition to its effect on the heart, betaxolol reduces the pressure within the eye. This effect is thought to be caused by reducing the production of the liquid within the eye. The precise mechanism of this effect is not known. The reduction in intraocular pressure reduces the risk of damage to the optic nerve and loss of vision in patients with elevated intraocular pressure due to glaucoma.
Timolol is a beta blocker medication used either by mouth or as eye drops. As eye drops it is used to treat increased pressure inside the eye such as in ocular hypertension and glaucoma. By mouth it is used for high blood pressure, chest pain due to insufficient blood flow to the heart, to prevent further complications after a heart attack, and to prevent migraines.
Ocular hypertension is the presence of elevated fluid pressure inside the eye, usually with no optic nerve damage or visual field loss.
Brimonidine is an α2 agonist medication used to treat open-angle glaucoma, ocular hypertension, and rosacea. In rosacea it improves the redness. It is used as eye drops or applied to the skin.
Brinzolamide is a carbonic anhydrase inhibitor used to lower intraocular pressure in patients with open-angle glaucoma or ocular hypertension.
Dorzolamide, sold under the brand name Trusopt among others, is a medication used to treat high pressure inside the eye, including in cases of glaucoma. It is used as an eye drop. Effects begin within three hours and last for at least eight hours. It is also available as the combination dorzolamide/timolol.
Bimatoprost, sold under the brand name Lumigan among others, is a medication used to treat high pressure inside the eye including glaucoma. Specifically it is used for open angle glaucoma when other agents are not sufficient. It may also be used to increase the size of the eyelashes. It is used as an eye drop and effects generally occur within four hours.
Travoprost, sold under the brand name Travatan among others, is a medication used to treat high pressure inside the eye including glaucoma. Specifically it is used for open angle glaucoma when other agents are not sufficient. It is used as an eye drop. Effects generally occur within two hours.
Brimonidine/timolol, sold under the brand name Combigan among others, is a fixed-dose combination medication eye drop used for the treatment of glaucoma. It is a combination of brimonidine and timolol.
Tafluprost is a prostaglandin analogue. It is used topically to control the progression of open-angle glaucoma and in the management of ocular hypertension, alone or in combination with other medication. It reduces intraocular pressure by increasing the outflow of aqueous fluid from the eyes.
Latanoprost/timolol, sold under the brand name Xalacom, is a combination drug used for the treatment of glaucoma, consisting of latanoprost and timolol.
Glaucoma medication is divided into groups based on chemical structure and pharmacologic action. The goal of currently available glaucoma therapy is to preserve visual function by lowering intraocular pressure (IOP) in patients that have an increased intraocular pressure.
Ripasudil, a derivative of fasudil, is a rho kinase inhibitor drug used for the treatment of glaucoma and ocular hypertension.
Bimatoprost/timolol, sold under the brand name Ganfort, is a medication for the treatment of certain conditions involving high pressure in the eyes, specifically open angle glaucoma and ocular hypertension. It is available as eye drops.
Netarsudil/latanoprost, sold under the brand name Rocklatan among others, is a fixed-dose combination medication use to treat elevated intraocular pressure (IOP) in people with open-angle glaucoma or ocular hypertension. It contains netarsudil mesylate and latanoprost. It is applied as eye drops to the eyes.
Brinzolamide/brimonidine, sold under the brand name Simbrinza, is a fixed-dose combination medication used to reduce intra-ocular pressure in adults with ocular hypertension or in those with an eye condition known as open-angle glaucoma. It contains brinzolamide and brimonidine tartrate. It is used as an eye drop.
Posner–Schlossman syndrome (PSS) also known as glaucomatocyclitic crisis (GCC) is a rare acute ocular condition with unilateral attacks of mild granulomatous anterior uveitis and elevated intraocular pressure. It is sometimes considered as a secondary inflammatory glaucoma.