Opilon

Quick links to important sections

Opilon

Treatment option:

Medically reviewed

Rosario Oropesa

Last updated on 22/12/2025

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 Opilon

Quick Facts

Property Description
Active ingredient Moxisylyte hydrochloride (Thymoxamine)
Form Tablets, Injectable (parenteral), Ophthalmic solutions
Pharmacological class Alpha-adrenergic antagonist (α-blocker)
Common use Counteracting restricted blood flow (Vasodilator)
Origin Synthetic organic compound

What is Opilon (Moxisylyte)?

Opilon is a prescription medication whose active component is moxisylyte hydrochloride, an approved synthetic organic compound also known by its International Nonproprietary Name (INN), thymoxamine. This medicine is formally classified as an alpha-adrenergic antagonist, placing it within the pharmacological family of alpha-blockers.

The substance functions as a prodrug, quickly converting within the body into an active metabolite, deacetyl-thymoxamine, which mediates the therapeutic effect. Its fundamental purpose is to modulate the constriction of blood vessels, thereby influencing localized circulation. Clinical studies have supported its efficacy in facilitating relaxation of vascular smooth muscle, which is a key distinguishing factor in its application profile.

Type, Forms, and General Therapeutic Benefit

The identity of Opilon is also defined by its therapeutic category as a peripheral vasodilator, a classification tracked by the World Health Organization. The drug is a single-ingredient product available across several dosage forms, including oral tablets, sterile solutions for parenteral (injectable) administration, and specialized ophthalmic solutions.

This range of forms is a unique characteristic, allowing its mechanism to be used for systemic effects, as well as highly localized action. Moxisylyte works through α1 adrenoceptor antagonism, blocking the natural chemical signals (like norepinephrine) that induce vessel narrowing. This mechanism promotes vasodilation—the widening of blood vessels—which is the underlying action that generally helps to enhance blood flow and alleviate issues related to circulatory restriction.

What side effects are possible with Opilon?

The official safety documentation for Opilon (moxisylyte) details adverse reactions and safety constraints derived from its classification as an alpha-adrenergic antagonist and its specific therapeutic applications. This information is organized by regulatory authorities (such as the EMA and FDA) into categories based on frequency and affected body systems.

Adverse Reaction Scope

Category Description
Key Adverse Reaction Categories Reactions are primarily related to the drug's vasodilatory effect, with impacts on the cardiovascular and nervous systems, as well as specific localized effects.
Frequency Classification Common: Headache, dizziness, and gastrointestinal disturbances (e.g., nausea, diarrhea). Rare/Serious: Significant hypotension and tachycardia.
System-Organ Classes Involved Vascular disorders (Hypotension); Cardiac disorders (Tachycardia); Nervous system disorders (Headache, Dizziness); Gastrointestinal disorders; Reproductive system disorders (Priapism); Eye disorders (local effects).
Serious Adverse Reactions Regulatory documents highlight severe hypotension, tachycardia, systemic allergic reactions, and priapism (prolonged erection) as events requiring close attention.
Population-Specific Safety Use is cautioned or restricted in individuals with severe cardiovascular conditions (e.g., uncontrolled heart failure or hypertension) and those with hepatic or renal impairment. Safety data are generally considered limited for use during pregnancy and lactation.
Safety-Related Restrictions Contraindications exist for known hypersensitivity to moxisylyte. Caution is advised regarding concurrent use with other antihypertensive agents due to the enhanced risk of severe hypotensive effects. The risk of hypotension may be more pronounced at the initiation of treatment.

Connection to the overall safety profile

The official safety documentation for Opilon serves to objectively define the known risks associated with its peripheral vasodilatory action. By grouping reactions into System-Organ Classes and assigning frequency classifications, regulatory documents provide a standardized, neutral framework for understanding the medicine's potential impact across various body systems. This structure ensures that both common expected effects and rare, serious adverse events are formally communicated as required by government health authorities.

Overdose and Emergency Response

Overdose and When to Seek Help

Official regulatory information for Opilon (moxisylyte) is strictly focused on the documented risks associated with an excessive dose of an alpha-adrenergic antagonist. An overdose is expected to result in a severe exaggeration of the drug's intended action, primarily affecting the cardiovascular system.

Overdose manifestations formally documented or anticipated in the regulatory profile include profound hypotension (abnormally low blood pressure) and a resulting compensatory tachycardia (rapid heart rate). These severe physiological changes are considered life-threatening and require immediate attention.

Overdose Manifestation Regulator-Mandated Action
Profound Hypotension Seek Immediate Medical Attention
Severe Tachycardia Contact Emergency Services

Regulatory authorities mandate that immediate medical attention must be sought in all cases of suspected overdose. The officially documented management strategy for an overdose is symptomatic and supportive treatment. There is no specific antidote officially stated in the public prescribing information. Clinical observation and continuous monitoring are required to manage the unstable cardiovascular signs resulting from the excessive exposure. Specific overdose risk factors related to age or organ impairment are not explicitly detailed in the public regulatory information.

Therapeutic Uses of Opilon

What Opilon Treats: Main Uses and Benefits

Opilon is commonly applied in clinical settings that involve acute or unstable symptom patterns related to restricted blood flow in the extremities. It is relevant across conditions characterized by episodic or fluctuating symptom patterns, such as Raynaud's phenomenon, and contributes to improved comfort during periods of heightened symptoms. The drug is commonly used within the established therapeutic domain of peripheral vascular disorders and in specialized ophthalmology applications. Opilon is used in areas where short-term symptom management is appropriate, including conditions related to peripheral circulatory issues, specific urological difficulties, and elevated intraocular pressure.

Quick Fact: Relief for Symptoms of Vasospasm The primary benefit is that Opilon helps ease the overall symptom burden of coldness, discoloration, and discomfort associated with vasospasm.

The medication is commonly used across therapeutic domains involving smooth muscle regulation, specifically offering symptomatic assistance for certain urological difficulties, such as issues with bladder emptying in specific neurological disorders (e.g., Multiple System Atrophy), and for erectile dysfunction associated with vascular flow. This use offers symptomatic relief that helps patients cope more steadily with symptom fluctuations. It is also applied in clinical settings that involve acute or unstable symptom patterns within ophthalmology, particularly to address elevated intraocular pressure and is relevant for easing challenging symptomatic phases in the eye.

Eligibility and Restrictions for Use

Who Can and Cannot Use Opilon?

This section outlines the population eligibility rules for Opilon (Moxisylyte hydrochloride) based strictly on official regulatory labeling, defining which groups are approved, restricted, or contraindicated.


Contraindications and Non-Eligibility

Opilon is contraindicated and must not be used by patients who have suffered a recent cardiac infarction or who are in the acute phase of a cerebrovascular accident (stroke). Use is also prohibited for patients with active liver disease or known hypersensitivity to the active ingredient or excipients.


Age and Reproductive Status Eligibility

Opilon is not indicated for use in children. The product should not be used during pregnancy or lactation (breastfeeding). For older adults (over 65 years), use is typically similar to that for adults, although specific clinical data may be limited.


Use with Caution

Regulatory documents specify that Opilon must be used with caution in patients with certain pre-existing conditions, including anginal symptoms, cerebrovascular insufficiency, and diabetes.

What should I know about interactions with other medicines?

Interactions with other medicines and products

The official regulatory profile for moxisylyte (Opilon) focuses primarily on pharmacodynamic interactions related to its classification as an alpha-adrenergic antagonist. These interactions describe effects where co-administered medicines may experience an altered outcome, based on the documented information found in official prescribing labels.

Documented Pharmacodynamic Interactions

Interacting Substance/Class Official Interaction Description
Tricyclic Antidepressants Co-administration may increase the hypotensive effect produced by moxisylyte's alpha-blockade.
Antihypertensive Drugs The alpha-adrenergic blocking action may potentiate the effect of a number of other medicines used to manage blood pressure.

Other Documented Interaction Cautions

Official labels note a specific caution for use in patients with diabetes. This is due to a theoretical metabolic concern that moxisylyte may cause a reduction in insulin requirements.

No contraindicated drug-drug combinations are explicitly listed in the regulatory documents. Furthermore, the official prescribing information does not stipulate mandatory timing separation rules between doses, nor does it contain explicit warnings regarding interactions with food, alcohol, or herbal products.

Mechanism of Action

Competitive alpha1-Adrenoceptor Blockade

Opilon's active metabolite, deacetyl-thymoxamine, exerts its pharmacological effect by acting as a competitive antagonist at the post-synaptic alpha-1 adrenergic receptor (alpha1-adrenoceptor). This molecular interaction physically blocks the receptor site on smooth muscle cells, directly preventing the binding of the body's natural ligand, norepinephrine. This action inhibits the subsequent intracellular signaling cascade, specifically by reducing the release of calcium ions ( Ca^2+) that initiate muscle contraction.


Pathway Modulation and Physiological Consequences

Blocking the alpha1-adrenoceptor alters the sympathetic nervous system's influence on the circulatory system, reducing the prevailing sympathetic tone that maintains high vascular tension. This mechanism leads to the relaxation of vascular smooth muscle and the subsequent vasodilation (widening of blood vessels), resulting in the physiological consequence of increased localized perfusion. This antagonism also affects non-vascular smooth muscle; for example, its action on the iris dilator muscle leads to the physiological effect of miosis (pupil constriction). The drug's mechanism is fundamentally reliant on antagonizing pre-existing sympathetic activity.

Dosage and Administration Information

Opilon (moxisylyte hydrochloride) is administered through distinct routes that correspond to its specific dosage forms and therapeutic intent. The medication is available as a film-coated tablet for systemic effects, as sterile solutions utilized in specialized parenteral (injectable) administration, and as ophthalmic solutions for highly localized topical use in the eye.

The oral regimen establishes the primary usage pattern for the drug. The standard adult dose is one 40 mg tablet per administration. This dosage is typically directed to be taken four times daily (QID), distributing the medicine evenly throughout the day. In certain conditions, the official schedule allows for a frequency of administration every three hours, limited to a 12-hour symptomatic period. The total daily intake for the oral formulation is not to exceed 160 mg.

A key procedural requirement involves the duration of treatment. The official label mandates that the drug must be discontinued if a beneficial therapeutic response is not observed within two weeks of starting the oral regimen. Regarding specific populations, the standard adult dosing schedule is maintained for older adults (over 65 years). Critically, moxisylyte is not indicated for use in children, defining a clear administrative restriction for the pediatric population.

Recent Clinical Evidence

Research Evidence: Overview of Studies for Opilon

This section provides a summary of the clinical research and scientific studies that form the foundation for Opilon’s regulatory classification, focusing on the types of evidence that exist, the populations studied, and the outcomes that were measured, as described in authoritative governmental and peer-reviewed sources.


Evidence for Use in Primary Raynaud's Phenomenon

This block summarizes the body of evidence, including systematic reviews and Randomized Controlled Trials (RCTs), that have investigated Opilon's (moxisylyte) application in studies examining outcomes related to episodic restricted blood flow. These studies focused on adult participants with Primary Raynaud's Phenomenon and specifically measured outcomes related to the frequency, severity, and duration of vasospastic attacks over short-term periods, often comparing the drug to a placebo.

Systematic reviews synthesizing the available trial data reported patterns observed in the studies where the measured rate of vasospastic attacks per week in some participants receiving moxisylyte was associated with a lower measured rate compared to those receiving placebo. The research reports data collected during the study period, including changes in physiological measures like the rate of digital rewarming following cold exposure.

Evidence for Ophthalmic and Acute Localized Use

This content describes the nature of research that investigated the acute, localized effects of the ophthalmic solution. The studies were typically small-scale clinical investigations that explored immediate outcomes, including changes in intraocular pressure (IOP), the induction of miosis (pupil constriction), and changes in the aqueous outflow facility, in subjects with normal eyes or those with ocular hypertension.

The research describes the documentation of pupil constriction in the studies conducted. However, in studies comparing Opilon to standard pressure-lowering medications, the measured changes in intraocular pressure were observed in some studies to be non-significant. Long-term effects are not fully established for the use of the ophthalmic solution for sustained pressure management.

Evidence Gaps and Areas of Uncertainty in Research

The existing evidence for Opilon is characterized by several limitations. Evidence quality varies across studies, particularly in the older trials, due to differences in design and the endpoints used. Sample sizes were modest in many of the key studies, and this, combined with limited information for long-term outcomes, means certainty remains low in drawing broad conclusions. The evidence contributes to understanding symptom patterns but requires more data from modern, large-scale studies.

Frequently Asked Questions (FAQ)

Common questions about Opilon (FAQ)


Q: Can Opilon help with general symptoms of poor blood flow?

A: Opilon is classified as a peripheral vasodilator, meaning its mechanism is intended to promote the relaxation and widening of blood vessels. According to official product information, the medicine is indicated for conditions related to episodic, restricted blood flow, such as Primary Raynaud's Phenomenon.


Q: Are there any specific foods or drinks that should be avoided while taking Opilon?

A: Official regulatory documents do not provide specific warnings regarding interactions with food or alcohol. Patients typically monitor for any personal variations when taking medication with or without meals.


Q: Is it normal to feel a little dizzy when starting Opilon?

A: Dizziness is officially classified as a common side effect of Opilon, as detailed in regulatory safety documents. This effect is particularly noted when treatment is first initiated.


Q: Can Opilon affect my sleep schedule?

A: Official safety documents list a range of nervous system disorders as potential adverse reactions. However, specific changes to the sleep schedule are not frequently reported in the official product information.


Q: Are there any warnings about combining Opilon with herbal supplements?

A: Official regulatory information does not stipulate explicit warnings or mandatory restrictions regarding the combination of Opilon with herbal products. The complete profile of all concurrent supplements should be known to a healthcare provider.


Q: Do you need to take Opilon with food, or can it be taken on an empty stomach?

A: Official prescribing information does not contain explicit warnings regarding interactions with food. It does not mandate that the medicine be taken with meals, nor does it stipulate mandatory timing separation rules.


Q: How long does a course of Opilon treatment usually last?

A: The official product label provides a rule for determining the duration of treatment effectiveness. If no beneficial therapeutic response is observed within two weeks of starting the oral regimen, regulatory guidance indicates that the medicine should be discontinued.


Q: Can Opilon cause changes in mood or anxiety levels?

A: As with many medications, official safety documents list potential nervous system disorders as adverse reactions. Specific changes to mood or anxiety levels are not frequently reported in the official safety information.


Q: Is Opilon effective for cold hands and feet due to circulation?

A: Opilon is approved for use in conditions like Primary Raynaud's Phenomenon, which is an indication related to episodic restricted blood flow. This condition frequently results in symptoms such as cold hands and feet.


Q: What does Opilon do that makes it helpful for certain conditions?

A: Opilon belongs to a class of medicines called alpha-adrenergic antagonists (alpha-blockers). Its action promotes the relaxation and widening of blood vessels, an effect which is used to support circulation.


Q: Does Opilon have a warning about driving or operating machinery?

A: Yes. Due to common side effects such as dizziness and potential hypotension (low blood pressure), official documentation advises caution. Patients are advised to exercise caution regarding driving or operating machinery, particularly when starting the treatment.


Q: How is Opilon stored properly?

A: The tablets must be stored in their original container to protect them from light and moisture. The product label requires storage not above 30°C and mandates that the medicine be kept out of the sight and reach of children.


Q: What are the signs that Opilon might not be working for my condition?

A: Regulatory documentation specifies a period for evaluating effectiveness. If a beneficial therapeutic response is not observed within two weeks of starting the oral regimen, the drug should be discontinued.


Q: Is Opilon generally well-tolerated by most patients?

A: Official safety documentation notes that the most common adverse effects are related to the drug's mechanism of widening blood vessels. These commonly include headache, dizziness, and gastrointestinal disturbances.


Q: What is the maximum duration Opilon has been studied for continuous use?

A: Due to the nature of the studies, regulatory summaries of the research evidence note that information for long-term outcomes remains limited. This means that the maximum duration for continuous use is not fully established.


Q: Does Opilon carry a risk of allergic reaction?

A: Known hypersensitivity (allergy) to the active ingredient is an official contraindication, meaning the drug should not be used in such cases. Systemic allergic reactions are also listed as a rare, but serious, potential adverse event.


Q: Can patients with diabetes use Opilon?

A: The medicine should be used with caution in patients with diabetes. This is due to a theoretical concern in regulatory documents regarding a potential reduction in insulin requirements.


Q: Are there different strengths of Opilon tablets available?

A: The standard adult dose for the oral regimen is documented as one 40 mg tablet per administration in the official product information. Other specialized forms of the medicine, such as injections, may have different concentrations.


Q: Can Opilon interact with medications for depression or anxiety?

A: Opilon has a documented interaction with Tricyclic Antidepressants, which are a class of medication sometimes used for depression. The combination may increase the potential for hypotension (low blood pressure) due to Opilon's mechanism of action.

How should Opilon be stored and disposed of?

How to Store and Dispose of Opilon

The storage and disposal of Opilon (moxisylyte hydrochloride) tablets are defined by regulatory labeling to maintain the product's integrity and ensure public safety.

Official Storage Requirements

Requirement Type Condition
Temperature Constraint Do not store above 30°C.
Packaging Store in the original container.
Child Safety Keep out of the sight and reach of children.

These conditions support the medicine's 3-year shelf life. The requirement to store in the original container is essential for protection.

Official Disposal Instructions

Unused or expired Opilon must be handled according to strict pharmaceutical waste protocols. Regulatory guidance mandates that the medicine must not be thrown away via wastewater or household waste. Disposal of any unused product or waste material must be conducted in accordance with local requirements established for medicinal products.

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

Available in countries:

Equivalent of Opilon found in:

A-Z Index: