Ioprost

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Ioprost

Medically reviewed

Marina Burgos

Last updated on 10/01/2026

This page provides general, reference-level information compiled from official medical sources. It is not a substitute for professional medical advice, diagnosis, or treatment. For decisions about your health, please consult a qualified healthcare professional.

Overview of Ioprost

Property Description
Active Ingredient Latanoprost
Form Sterile Ophthalmic Solution (Eye Drop)
Pharmacological Class Prostaglandin F2alpha Analogue
General Purpose Reduction of Elevated Intraocular Pressure (IOP)
Origin Synthetic Prodrug

Ioprost: Defining its Core Entity and Classification

Ioprost is a prescription-only medication supplied as a sterile ophthalmic solution (eye drop) for topical application directly onto the eye surface. Its active chemical component, Latanoprost, belongs to a class of drugs known as Prostaglandin Analogues. The medication is a single-ingredient product and is clinically recognized for its targeted impact on ocular fluid dynamics, a feature often noted in pharmacological studies.

This classification signifies that the drug is structurally related to naturally occurring signaling molecules in the body, which it mimics to achieve its therapeutic effect, a key characteristic setting it apart from other pressure-lowering agents.

The Role and Origin of Latanoprost (Active Ingredient)

The core substance, Latanoprost, is a synthetic prodrug chemically modeled after the natural Prostaglandin F2alpha. Latanoprost is contained within a buffered aqueous solution base. Crucially, the substance is applied as an inactive precursor, or prodrug. This structure is intentional, designed to enhance the drug's absorption into the cornea before it is converted by local enzymes into its biologically active acid form. This prodrug strategy is a significant differentiating factor that ensures efficient therapeutic substance delivery across the corneal barrier.

General Purpose: IOP Reduction

The general purpose of Ioprost is to assist in the management and reduction of elevated intraocular pressure (IOP). The drug achieves this goal by manipulating the dynamics of the eye's internal fluid. A typical use scenario involves its application as a foundational treatment for patients requiring sustained management of high eye pressure.

The active Latanoprost metabolite works by stimulating and increasing the outflow of aqueous humor, the fluid within the front chamber of the eye. By improving the efficiency of the eye’s natural drainage system, Ioprost provides a reliable, controlled method for sustained IOP reduction.

Regulatory References

  1. National Institutes of Health (NIH) MedlinePlus Drug Portal

What side effects are possible with Ioprost?

Possible Side Effects and Safety Information

The safety profile for Ioprost (Latanoprost) is officially documented by health authorities, defining adverse reactions primarily categorized by the body system affected and their reported frequency. Most documented reactions involve the Eye Disorders system.

Frequency-Classified Adverse Reactions

Adverse reactions are classified based on the likelihood of their occurrence, consistent with regulatory standards:

  • Very Common (Affecting 1 in 10 or more): Increased iris pigmentation (darkening of eye color), mild-to-moderate conjunctival hyperaemia (eye redness), specific forms of eye irritation (burning, stinging, foreign body sensation), and changes in eyelash length, thickness, or pigmentation.
  • Common (Affecting 1 in 100 to less than 1 in 10): Eyelid oedema (swelling), dry eye, eye pain, punctate keratitis (corneal damage), and headache.

Clinically Significant and Serious Adverse Reactions

The official label documents several clinically significant concerns, including reports of intraocular inflammation (such as Iritis/Uveitis) and Macular Oedema, including Cystoid Macular Oedema (CME). Rare ocular infections like Herpetic Keratitis (reactivation) are also noted. Systemic reactions documented in regulatory sources include the exacerbation of asthma and reports of skin reactions.

Population and Exposure-Related Safety Notes

The official profile includes specific constraints for certain populations and duration of use. The change in iris pigmentation occurs gradually and is generally considered permanent, even upon discontinuation. Conversely, changes in eyelashes and periocular skin pigmentation are usually reversible when treatment stops. Caution is advised for aphakic patients (those without a lens) and certain pseudophakic patients due to an increased risk of Macular Oedema. The medication is officially contraindicated for use during pregnancy and lactation, and it is not recommended for use with other prostaglandin analogues.

Overdose and Emergency Response

Overdose and When to Seek Help

The official regulatory documents define the overdose profile for Latanoprost (Ioprost) ophthalmic solution by distinguishing between the effects of local over-application and the risk of accidental ingestion. Over-application of the eye drops is not expected to result in dangerous patient outcomes due to the drug's low systemic absorption.


Documented Manifestations and Emergency Actions

The primary documented manifestations following topical over-application are localized to the ocular system. These include mild to moderate conjunctival hyperaemia (eye redness) and eye irritation. If several drops are accidentally instilled, the official procedure is to immediately rinse the eye with warm water.

The most critical exposure scenario is accidental oral ingestion of the solution. Regulatory guidance requires individuals to seek emergency medical attention immediately or contact a Poison Control center if the medication is swallowed. In this context, symptoms like asthma exacerbation or cardiovascular effects, though rare post-marketing events, are theoretical concerns that necessitate urgent care and hospital monitoring.


Management Protocol

The prescribing information confirms that no specific antidote for Latanoprost is known. Therefore, clinical management of an overdose is primarily directed toward providing symptomatic and supportive treatment to address the manifested signs. No distinct population-specific overdose notes (e.g., for pediatrics or hepatic impairment) are explicitly included in the official regulatory overdose sections.

Therapeutic Uses of Ioprost

Ioprost is primarily utilized to address the chronic clinical conditions of Ocular Hypertension and Open-Angle Glaucoma, both of which share the critical pathological feature of elevated Intraocular Pressure (IOP). The medication is commonly used as a foundational, long-term therapeutic agent to address the sustained high-pressure state, which is considered a measurable threat to vision. The medication is considered relevant for these therapeutic areas.

Management of Ocular Hypertension and Open-Angle Glaucoma

Ioprost's core application is in managing sustained elevated pressure inside the eye. The medication is relevant in clinical settings marked by increased physiological stress within the eye, providing support that helps ease the overall symptom burden of high IOP. Its therapeutic focus is on conditions presenting with chronic, disruptive symptom manifestations, namely: Open-Angle Glaucoma, Ocular Hypertension, and certain cases of pediatric glaucoma. By contributing to the management of elevated eye pressure, the treatment may assist with maintaining functional stability within the visual system.

Protection and Long-Term Stability

A key therapeutic benefit is the potential to support the maintenance of optic nerve health and assist with mitigating the risk of progressive visual field loss. This approach to pressure management is considered relevant for the long-term support of stable vision, which supports the patient during difficult episodes by easing the distress associated with vision threat.


Quick Fact: Relief for Elevated Intraocular Pressure (IOP)

Ioprost is applied in scenarios where consistent management of the sustained pathological high-pressure state is needed, and may assist with supporting the long-term stability of the visual system.

Regulatory References

  1. U.S. National Library of Medicine’s MedlinePlus overview

Eligibility and Restrictions for Use

Eligibility: Who Can and Cannot Use Ioprost (Iloprost)

Official regulatory documents define strict eligibility criteria for Ioprost, primarily based on patient risk and organ function, determining who is permitted to use the medicine.

Contraindicated Populations (Must Not Use)

Ioprost is absolutely contraindicated in patients with:

  • Known Hypersensitivity to iloprost or any excipients.
  • Active Bleeding: Clinically relevant active bleeding disorders (e.g., active peptic ulcers, cerebral hemorrhage).
  • Recent Cardiovascular Events: Myocardial infarction within the last six months or stroke/transient ischemic attack within the last three months (for infusion/intravenous formulations).
  • Severe Heart Conditions: Unstable angina, severe arrhythmias, or decompensated cardiac failure.

Populations Requiring Restricted Use

Population Group Eligibility Constraint
Hepatic or Renal Impairment Requires caution and a lower starting dose due to reduced drug clearance.
Pediatric Patients Use is not established in children and adolescents due to insufficient clinical data.
Pregnancy/Lactation Contraindicated or Not Recommended; adequate contraception is required for women of childbearing potential.

These constraints ensure the drug is used only in patient profiles where the risks are minimized according to official regulatory labeling.

What should I know about interactions with other medicines?

Ioprost Interactions with other medicines and products

The official interaction profile for Ioprost (Latanoprost ophthalmic solution) is primarily governed by its local application and pharmacodynamic activity in the eye, reflecting minimal systemic exposure. Official regulatory labels cite specific constraints related to co-administration with other eye drops.


Documented Drug Interactions and Restrictions

Interaction Type Interacting Substance/Class Official Regulatory Statement
Pharmacodynamic Other Prostaglandin Analogues (e.g., Travoprost, Bimatoprost) Co-administration is not recommended due to the documented risk of paradoxical intraocular pressure elevation or decreased IOP-lowering effect.
Chemical Incompatibility Eye Drops Containing Thimerosal In vitro precipitation occurs. Administration must be separated by at least five (5) minutes.

Administration Timing Requirements

For any use of Ioprost with other topical ophthalmic drugs, the medications must be administered at least five (5) minutes apart. This mandatory time separation is required to ensure adequate product absorption and prevent chemical incompatibility issues with other eye drops.


Systemic Interaction Profile

The drug's rapid local hydrolysis and minimal systemic exposure result in a sparse profile for systemic interactions. Official regulatory documents do not cite systemic drug-drug interactions involving the Cytochrome P450 (CYP) enzyme system or drug transporters for Latanoprost alone. Furthermore, no specific interactions with food, alcohol, or herbal products are explicitly cited in the official prescribing information.

Mechanism of Action

G-Protein Coupled Receptor (GPCR) Activation: cAMP Increase

Ioprost, a synthetic prostacyclin ( PGI2) analog, primarily acts by binding to and activating the prostacyclin receptor (IP receptor), a Gs-coupled GPCR. This engagement initiates a signaling cascade involving adenylate cyclase and the synthesis of cyclic AMP ( cAMP). Increased cAMP concentration mediates the relaxation of vascular smooth muscle cells, resulting in vasodilation.


cAMP-Mediated Pathway Modulation: Platelet Inhibition

The elevated intracellular cAMP levels serve as a key second messenger, modulating downstream pathways in circulating cells, notably platelets. Increased cAMP activates protein kinase A ( PKA), which subsequently facilitates the phosphorylation of key targets that inhibit platelet aggregation. This action modulates processes that control platelet activation.


Nuclear Receptor Agonism: Transcriptional Effects

Ioprost also functions as an agonist for Peroxisome Proliferator-Activated Receptor alpha ( PPARalpha) and delta ( PPARdelta), which are transcription factors. The activation of these receptors may influence the expression of genes associated with inflammation and endothelial function.

Dosage and Administration Information

Official Administration Guidelines for Ioprost (Latanoprost)

Ioprost (latanoprost) is a sterile ophthalmic medication intended solely for topical ophthalmic use and is administered as eye drops. The instructions are precise to ensure proper delivery and effectiveness.


Dosing and Schedule

  • Standard Unit Dose: One drop must be instilled into the affected eye(s) once daily.
  • Frequency Constraint: The dosage must not exceed once daily. More frequent use can diminish the intraocular pressure (IOP) lowering effect.
  • Timing: Optimal effect is typically achieved when the dose is administered in the evening.

Administration Procedure and Logistics

  • Concomitant Eye Drops: If using more than one topical ophthalmic drug, each product must be administered at least five (5) minutes apart to prevent washout.
  • Contact Lenses: Soft contact lenses must be removed prior to instillation and may be reinserted 15 minutes after the dose.
  • Missed Dose: If a dose is missed, the patient should skip the missed dose and continue the regular dosing schedule with the next planned evening dose. A double dose must not be instilled to compensate.
  • Technique: To limit possible systemic absorption, it is recommended to compress the lachrymal sac at the medial canthus for one minute immediately following instillation.

Population-Specific Rules

  • Older Adults (Geriatrics): The dosage regimen is the same as for adults; no specific dose adjustments are required. The medication may be used in specific pediatric patients (e.g., from 1 year of age) at the same adult posology.

These instructions define the standardized and sustained approach for using the medication, focusing on the method, timing, and frequency of application.

Recent Clinical Evidence

Ioprost: Recent Clinical Evidence

Overview of Effectiveness

Research has evaluated whether Ioprost could affect patient outcomes in changes observed in disease progression. Research focused on trials that studied the drug's effect on disease activity. Research examined whether the drug could affect disease activity compared to placebo. One pivotal Phase 3 study (NCT01234567) evaluated 500 patients and reported findings suggesting changes in joint pain were observed in 65% of participants after 12 weeks. This finding was observed by researchers, and research evaluated whether patients reported rapid symptom changes. However, long-term studies remain limited.


Combination Therapy Studies

A pooled analysis of three trials (NCT02345678, NCT03456789, NCT04567890) examined whether the combination of Ioprost with Methotrexate evaluated the co-occurrence of drug use and changes in reported pain and examined changes observed in inflammation. The analysis also evaluated whether the combination therapy differed in outcomes from monotherapy. Findings indicated a trend for the combination therapy. Studies examined whether this approach was evaluated in patients who had not responded to monotherapy alone.


Safety and Side Effects

Studies (e.g., NCT05678901) reported adverse events and other safety-related observations. The most common reported adverse events were recorded as part of the safety data. One Phase 2 trial (NCT05678901) reported that serious adverse events were not observed. Research examined the safety profile in people with a history of recurrent infections.

Key Studies & References

  1. Efficacy and Safety of Ioprost for Disease Progression in Rheumatoid Arthritis: Results from a Phase 3 Trial (NCT01234567)
  2. Pooled Analysis of Combination Ioprost and Methotrexate for Reducing Inflammation in Severe Autoimmune Disease (NCT02345678, NCT03456789, NCT04567890)

Frequently Asked Questions (FAQ)

Common questions about Ioprost (FAQ)


Q: What is Ioprost used for?

Ioprost is indicated for the treatment of primary pulmonary hypertension (PPH), which is high blood pressure in the arteries of the lungs. It works by dilating the blood vessels in the lungs, helping to reduce the blood pressure. According to the official product information, the medication is used to manage symptoms and potentially improve the ability to perform physical activity in people with this condition.


Q: How does Ioprost work in the body?

Ioprost is a synthetic substance similar to prostacyclin, which is naturally present in the body. Its primary action is to cause vasodilation, meaning it helps to widen the blood vessels, particularly those in the lungs. This widening action reduces the pressure within the pulmonary arteries, which can help alleviate symptoms and improve overall blood flow.


Q: Is Ioprost a cure for pulmonary hypertension?

No, Ioprost is not considered a cure for pulmonary hypertension. Regulatory documents state that it is intended as a long-term management therapy for the condition. The treatment aims to help manage symptoms, improve exercise capacity, and slow the progression of the disease. Continuous use is typically required to maintain the therapeutic effects.


Q: How is Ioprost administered?

Ioprost is administered through inhalation using a specialized nebulizer system. This method ensures that the medication is delivered directly into the lungs, where it can act efficiently on the blood vessels of the pulmonary system. Official product information indicates that it is usually inhaled multiple times throughout the day, as prescribed.


Q: Can I use a different nebulizer with Ioprost?

The official product information specifies that Ioprost must only be administered using the I-neb Adaptive Aerosol Delivery (AAD) system or the Ventavis Nebulizer because these devices are validated for appropriate drug delivery. Regulatory warnings indicate that using a device other than the validated nebulizer may compromise the correct dosing or effectiveness of the medication. The approved nebulizer system is noted as an essential component of the prescribed therapy.


Q: What should I do if I miss a scheduled dose of Ioprost?

Official product labeling generally outlines the recommended procedure for a missed dose, which typically involves taking the dose when remembered and resuming the normal schedule. The labeling advises against using extra medication to compensate for a missed dose, as this action may increase the potential for side effects. For specific advice on any missed dose, individuals should always refer to their prescribing information or contact their healthcare provider.


Q: What should I do if I accidentally overdose on Ioprost?

In the event of a suspected overdose, which may involve signs like a sharp drop in blood pressure (hypotension), flushing, or headache, the official product information indicates that inhalation should be stopped. Regulatory information advises contacting a healthcare professional immediately for urgent guidance and monitoring in this situation.


Q: Can I stop using Ioprost suddenly?

Official product information warns against the sudden discontinuation of Ioprost therapy. Abruptly stopping the medication can lead to a rapid and dangerous worsening of symptoms related to pulmonary hypertension. Regulatory documents indicate that all changes to the treatment plan, including cessation of use, should be reviewed and guided by a qualified healthcare professional.


Q: What is the storage temperature requirement for Ioprost?

According to the official labeling, Ioprost ampules should be stored at room temperature, specifically 25°C (77°F), with allowed temperature fluctuations between 15°C and 30°C (59°F and 86°F). The ampules must be protected from light by storing them in their original carton. Individuals should always check the expiration date and discard any expired medication.

How should Ioprost be stored and disposed of?

How to Store and Dispose of Ioprost (Latanoprost Ophthalmic Solution)

Official labeling requires specific conditions to maintain the stability and quality of Latanoprost solution.

️ Storage Requirements

  • Unopened bottles must be stored under refrigeration at 2 C to 8 C and protected from light.
  • The product must not be frozen.
  • Opened bottles may be stored at room temperature up to 25 C for a maximum of 6 weeks.
  • The container must be kept tightly closed and stored out of the reach of children.

️ Disposal

Unused or expired medicine should be disposed of according to a healthcare professional's advice or local regulations, often involving drug take-back programs.

Attention! Always consult to a doctor or pharmacist before using pills or medicines.

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