Vermine

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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 Vermine

Property Description
Active ingredient Verapamil Hydrochloride
Form Tablet (IR/ER), Capsule (ER), Injectable Solution
Pharmacological class Calcium Channel Blocker (CCB) / Group IV Antiarrhythmic Agent
General purpose Supports stable cardiovascular function
Origin Synthetic

What is Vermine and What is its Active Ingredient?

Vermine is a synthetic, prescription-only pharmaceutical agent whose sole active ingredient is Verapamil Hydrochloride. The drug's identity is rooted in this core compound, which is chemically classified as a phenylalkylamine and a nitrile. It is a single-ingredient product, generally available as an oral dosage form (immediate-release tablet, extended-release tablet, or capsule) and an injectable solution.

The availability of these multiple preparations, including both immediate and extended-release forms, allows for flexible therapeutic application, from rapid clinical intervention via the intravenous (IV) route to sustained daily management via the oral route. Verapamil Hydrochloride acts by modulating the flow of calcium ions.

Vermine's Pharmacological Class and Type

Vermine is primarily defined pharmacologically as a Calcium Channel Blocker (CCB) and secondarily as a Group IV Antiarrhythmic Agent. This classification places it within the category of slow-channel blockers, substances that restrict the entry of ionic calcium into certain muscle cells.

The specific type of CCB represented by Verapamil is the non-dihydropyridine subclass, which is clinically recognized for its unique dual mechanism of action on both the heart and blood vessels. This classification reflects its role as a medicine used in cardiovascular care.

The General Purpose of a Calcium Channel Blocker

The core purpose of this medication type is to support stable cardiovascular function. By inhibiting calcium influx, Vermine promotes the relaxation of vascular smooth muscle, reducing resistance against blood flow. This combined action—reducing systemic vascular resistance and moderating the heart's electrical rhythm—serves to optimize the heart's workload, contributing to efficient circulation and stable heart performance.

Regulatory References

  1. World Health Organization Essential Medicines Lists
  2. Verapamil on WHO Essential Medicines List

What side effects are possible with Vermine?

Possible side effects and safety information

The official safety profile for Vermine (Verapamil Hydrochloride) is formally documented by regulatory authorities, with adverse reactions categorized by their frequency and the physiological systems affected. The most frequently documented effects are concentrated on the cardiovascular and gastrointestinal systems, consistent with the drug’s pharmacological class.

Frequency-Classified Adverse Reactions

Adverse reactions are classified based on the incidence reported in clinical data and surveillance, with the most common including Constipation, Headache, Dizziness, Bradycardia (slowed heart rate), Hypotension (low blood pressure), and Peripheral edema.

System-Organ Classes and Serious Reactions

The most significant adverse reactions involve the Cardiac disorders system. These include rare but clinically serious events such as high-grade Atrioventricular (AV) Block, Sinus Arrest, Severe Hypotension, and the Worsening or New Onset of Cardiac Failure. Other documented systems include Gastrointestinal disorders (e.g., Nausea, Abdominal pain) and Nervous system disorders (e.g., Paresthesia, Tremor).

Population-Specific Safety Considerations and Restrictions

Specific safety statements exist for certain patient populations. For individuals with Hepatic Impairment, a dose reduction is formally required due to altered drug metabolism. Older adults may also exhibit increased susceptibility to adverse effects like hypotension. The official label establishes high-level safety constraints (contraindications), prohibiting the medicine's use in patients with conditions such as Cardiogenic Shock, Severe Hypotension, and specific forms of Atrioventricular Block or Sick Sinus Syndrome in the absence of a pacemaker. Additionally, adverse cardiac events may be more pronounced during dose titration or at treatment initiation.

Overdose and Emergency Response

Overdose and when to seek help: Official Regulatory Information for Vermine

Overdose involving Vermine (Verapamil Hydrochloride) may present with documented extensions of its pharmacological effects on the cardiovascular system. Official regulatory documents list severe Profound Hypotension and Severe Bradycardia as primary manifestations. Further documented signs include high-grade Atrioventricular (AV) Block, Sinus Arrest, and metabolic disturbances such as Hyperglycemia and Metabolic Acidosis.

Required Emergency Actions

Immediate medical attention and hospitalization are mandated for any suspected overdose due to the risk of rapid deterioration. Severe, life-threatening outcomes documented in official labeling include Cardiogenic Shock, Asystole, and Cardiac Arrest.

Overdose Management and Constraints

The official profile states that no specific antidote is known. Treatment is strictly symptomatic and supportive, focusing on correcting cardiovascular collapse using procedures like administering Intravenous Calcium and Vasopressors. Continuous cardiac monitoring is required. For ingestion of Extended-Release formulations, regulatory information notes a risk of delayed and prolonged toxicity, which necessitates an extended period of observation and care. Population-specific considerations also exist, noting that pediatric patients may demonstrate increased sensitivity to the cardiovascular depressant effects.

Therapeutic Uses of Vermine

What Vermine treats: main uses and benefits

Vermine is primarily an anthelmintic medication, meaning its core function is to address conditions involving parasitic worms and external parasites. The primary approved uses focus on the symptomatic management of debilitating parasitic diseases that create noticeable physiological strain and systemic burden.

The medicine is used for managing specific internal and external parasitic conditions. These conditions include intestinal roundworm infections like strongyloidiasis and onchocerciasis (river blindness), as well as certain external parasite infestations like scabies and lice. This medication is generally applied in addressing specific infectious or inflammatory or irritative states caused by the parasites themselves. For patients with weakened immune systems, addressing these infections may assist with managing symptoms and preventing further complications associated with acute parasitic manifestations, contributing to improved comfort during periods of heightened symptoms. The drug offers supportive relief that helps ease the overall symptom burden.

“The drug is commonly used across conditions presenting with acute episodes and where supportive symptom management is appropriate.”


Quick Fact: Relief for symptoms related to physical discomfort

The goal is to provide supportive relief when symptoms interfere with routine activities and assists with maintaining functional stability when symptoms are more noticeable.

Regulatory References

  1. NIH MedlinePlus overview on Ivermectin

Eligibility and Restrictions for Use

Who Can and Cannot Use Vermine?

Eligibility for Vermine (Ivermectin) is strictly governed by regulatory documentation, which defines absolute exclusions and conditional use populations.

Contraindications and Non-Eligibility

Category Official Regulatory Status
Absolute Contraindication Contraindicated in patients with a known hypersensitivity to any component of the product.
Pediatric Exclusion (Oral) Oral use is not established and generally excluded in children weighing less than 15 kg (33 lbs).
Pregnancy Status Not recommended (Pregnancy Category C); use only if potential benefit justifies the risk to the fetus.
Lactation Status Ivermectin is excreted in human milk; regulatory guidance advises a decision to discontinue nursing or discontinue the drug.

Conditional Use and Restrictions

Eligibility is restricted for individuals with specific comorbidities or conditions. Patients from endemic areas with a potential Loa loa co-infection require pre-treatment assessment to mitigate the risk of severe encephalopathy. Furthermore, patients with immunocompromised conditions (e.g., HIV) being treated for strongyloidiasis may require special consideration for repeat treatment regimens, indicating conditional use. Use in geriatric patients necessitates caution due to the higher likelihood of age-related organ impairment.

What should I know about interactions with other medicines?

Official Interaction Profile for Vermine (Verapamil Hydrochloride)

Official regulatory documents classify the interactions of Vermine primarily based on its effects on cardiac function and its role as an inhibitor of drug metabolism and transport systems.

Contraindicated and Restricted Combinations

Classification Interacting Agent Constraint/Basis
Prohibited Intravenous Beta-Blockers Must not be administered in close proximity (within a few hours) to intravenous Verapamil.
Avoided Ivabradine Co-administration is formally restricted due to significant increase in Ivabradine exposure.
Timing Rule Disopyramide Must not be administered within 48 hours before or 24 hours after Verapamil administration, as specified in labeling.

Metabolic and Exposure-Altering Interactions

Verapamil is documented as an inhibitor of the enzyme CYP3A4 and the efflux pump P-glycoprotein (P-gp). This can result in increased systemic exposure of numerous co-administered drugs, including:

  • Statins (e.g., Simvastatin, Lovastatin, Atorvastatin): Exposure (AUC) is significantly increased.
  • Cardiac Glycosides (e.g., Digoxin): Serum concentrations are elevated, which may lead to additive effects on cardiac conduction.
  • Immunosuppressants (e.g., Cyclosporine, Sirolimus, Tacrolimus): Plasma concentrations are increased.

Conversely, strong CYP3A4 Inducers (e.g., Rifampin) are documented to reduce Verapamil plasma levels, potentially diminishing its effect.

Non-Medicinal and Population Notes

The label states that consumption of Grapefruit Juice may significantly increase Verapamil plasma concentrations, and the combination should be avoided. Co-consumption of Ethanol (alcohol) is documented to make the effects of alcohol more severe and longer-lasting. In patients with Hepatic Impairment, the clearance of Verapamil is reduced, which may heighten the clinical significance of documented interactions.

Mechanism of Action

Vermine (Verapamil Hydrochloride) acts exclusively by binding to and blocking the L-type Voltage-Gated Calcium Channels ( L-VGCCs). This molecular action is highly specific, reversible, and exhibits use-dependence, where the blockade effect intensifies on frequently active channels, leading to enhanced modulation of rapidly conducting tissue.

Action on Conduction and Rate

By targeting the L-VGCCs predominantly in the sinoatrial ( SA) and atrioventricular ( AV) nodes, the drug slows the rate of electrical impulse generation and prolongs the time required for signals to pass. This results in negative chronotropy (slowing of heart rate) and negative dromotropy (slowing of conduction).

Action on Vascular Tone and Workload

In parallel, the mechanism reduces Ca^2+ influx into vascular smooth muscle cells ( VSMCs). The resulting relaxation of peripheral arterioles leads to vasodilation and a subsequent drop in systemic vascular resistance ( SVR). This reduction in the resistance against blood flow, combined with decreased myocardial contractility (negative inotropy), reduces myocardial oxygen consumption and cardiac workload.

Dosage and Administration Information

How to Use Vermine: Administration Guidelines

The administration protocol for Vermine (Verapamil Hydrochloride) is structured based on the intended clinical purpose—either long-term daily management or acute, monitored intervention. The medicine is available for oral use as Immediate-Release (IR) tablets, Extended-Release (ER) tablets, and capsules, as well as an Intravenous (IV) solution.

Dosing Patterns and Schedules

Oral therapy is initiated at a low dose, such as 80 mg of the IR tablet three times daily, or 180 mg to 240 mg of the ER form once daily. The daily dosage may be adjusted based on needs, but must not exceed the established maximum daily limit of 480 mg for most adults. The ER forms are defined by their once-daily frequency, while IR forms require divided doses. The IV solution is reserved for intermittent, acute use and involves a slow 5 mg bolus injection over a minimum of two minutes, administered only in a supervised setting.

Specific Use Contexts

Procedural guidelines include specific constraints related to intake and patient status. Oral forms are generally intended to be taken with food or immediately following meals. A key procedural constraint is that Extended-Release tablets or capsules must not be crushed, chewed, or divided, as this action compromises the controlled release mechanism. Furthermore, a significantly reduced starting dose is specified for older adults and patients with hepatic impairment. Upon planned discontinuation of long-term therapy, the dose is generally tapered gradually.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Vermine (Verapamil Hydrochloride)

The evidence base for Vermine, whose active ingredient is Verapamil Hydrochloride, focuses on its use in studies involving specific cardiovascular and heart rhythm conditions. The official research evidence primarily comes from formal controlled studies, systematic reviews, and meta-analyses.

Evidence for use in Hypertension (High Blood Pressure)

The research examining high blood pressure was studied for large Randomized Controlled Trials (RCTs) that included comparisons against a placebo or other available treatments. These studies were applied in research contexts involving long-term observation of high blood pressure in adults. Research monitored long-term outcomes describing major cardiovascular events like heart attack and stroke. The data describes patterns related to measured blood pressure changes in the observed populations.

Evidence for use in Chronic Stable Angina

For chronic stable chest pain (angina), the medicine was studied for controlled clinical trials. These studies primarily focused on outcomes related to physical discomfort and daily functioning. Research explored changes in a patient’s exercise capacity, specifically measuring the duration until symptoms began. Follow-up durations were limited in some of the symptom-based studies, meaning there is limited information for long-term outcomes regarding the maintenance of symptom control beyond the intermediate term.

Evidence for use in Rapid Heart Rhythms (Supraventricular Tachycardia)

The evidence for studying rapid heart rhythms, such as Paroxysmal Supraventricular Tachycardia (PSVT) and Atrial Fibrillation/Flutter, is derived from controlled clinical trials. Research examined observations related to rhythm changes in acute PSVT and, for chronic conditions, monitored the control of the ventricular rate. Research describes a relatively low rate of full conversion of established Atrial Fibrillation or Flutter to a normal rhythm, which was observed in some studies.

Research Gaps and Areas of Limited Data

Studies monitoring the drug's use in hypertension provide context regarding long-term outcomes. However, data for certain groups, such as the pediatric population, are limited. Comparative evidence is lacking in some areas, particularly when assessing the drug against newer medications in complex patient subgroups. Studies contribute to the broader evidence landscape, but research does not determine whether an individual will respond similarly.

Frequently Asked Questions (FAQ)

Common questions about Vermine (FAQ)

Q: Is Vermine used for conditions other than the primary ones listed?

The authorized uses for Vermine, according to official regulatory documents, are specific conditions such as hypertension, chronic stable angina, and certain fast heart rhythms. The labeling only covers these primary indications. Any uses beyond those officially listed are not part of the drug's authorized indication profile.

Q: How quickly should I expect to feel the effects of Vermine?

The time it takes for Vermine to start working varies based on its formulation. The immediate-release tablet and the IV solution are associated with a rapid onset of activity, while extended-release formulations are designed to work slowly and maintain their effects over a full day.

Q: Are there any long-term health concerns associated with taking Vermine?

Regulatory documents show that clinical studies have monitored the effects of Vermine on cardiovascular outcomes over many years. The official safety profile for long-term use includes tracking of rare, serious cardiac events, such as the worsening of existing heart failure. These potential risks are reviewed against the expected long-term benefits of the medication.

Q: I heard Vermine can cause X side effect; how common is that?

Official product information classifies adverse reactions based on their frequency observed in clinical data, using terms like "common," "uncommon," or "rare." This allows healthcare providers to assess how often specific effects were observed. This information is available in the drug's official regulatory material.

Q: Does taking Vermine require any changes to my diet?

According to official regulatory documents, two substances require avoidance: grapefruit juice and alcohol. Both can significantly alter how the medicine works in your body. In terms of administration, the oral forms of Vermine are generally specified to be taken with food.

Q: Is Vermine considered safe for older adults (seniors)?

Official labeling indicates that older adults may exhibit increased sensitivity to effects like low blood pressure. For this reason, a reduced starting dose is often specified in the administration guidelines for this population. This approach helps to account for the higher likelihood of age-related organ impairment affecting how the drug is processed.

Q: Can children or teenagers take Vermine?

Official regulatory text states that the use of Vermine is not established for children and is generally excluded below a certain weight threshold. For other children and teenagers, use is typically conditional based on specific medical criteria outlined in the regulatory documents.

Q: Are there known interactions between Vermine and vitamins or supplements?

Regulatory documents note that Vermine can inhibit the CYP3A4 enzyme system in the body. This action can lead to increased systemic exposure of various co-administered compounds, including certain supplements and herbal products.

Q: What happens if I stop taking Vermine suddenly?

Official product information states that when long-term therapy is planned for discontinuation, the dose is generally required to be tapered gradually over time. Sudden cessation of the drug is not the recommended procedure outlined in the regulatory labels.

Q: What is the general duration of treatment with Vermine?

Vermine is generally intended for two distinct durations of use, depending on the formulation. Oral tablets and capsules are authorized for the long-term, daily management of chronic conditions. In contrast, the intravenous solution is reserved strictly for acute, intermittent use in a clinical setting.

Q: Can Vermine cause lightheadedness or affect driving?

The official safety profile includes common reported side effects such as dizziness and low blood pressure, known as hypotension. The regulatory documents suggest caution regarding activities like driving, given these effects.

Q: What does it mean if my doctor says I have a 'contraindication' to Vermine?

In regulatory terms, a contraindication is a specific circumstance or pre-existing medical condition, such as severe hypotension or cardiogenic shock, that formally prohibits the use of a medicine. The official labeling specifies these conditions because the risk of using the medicine is considered to outweigh any potential benefit.

Q: Is the way Vermine works fully understood by scientists?

The drug's mechanism of action is well-defined and detailed in regulatory labels. Official documents describe its function as a calcium channel blocker that affects both the electrical conduction system of the heart and the tone of vascular smooth muscles. This mechanism is defined and documented in authoritative sources.

Q: What is Vermine's safety classification?

Vermine is internationally recognized, being included on the World Health Organization's Model List of Essential Medicines. Concerning reproduction, regulatory documents classify the drug as Pregnancy Category C, which indicates that the risk to the fetus cannot be definitively ruled out.

Q: Is Vermine effective for all subtypes of the condition it treats?

Studies and official information indicate that the effectiveness of Vermine may vary depending on the specific presentation of the condition being treated. For instance, research examining the drug's use in chronic fast heart rhythms describes a relatively low rate of full conversion to a normal rhythm in established atrial fibrillation or flutter.

Q: Does the official documentation explain the expected timeline for improvement with Vermine?

Official documentation for Vermine focuses on the measured changes observed in study populations, such as improvements in blood pressure or exercise capacity during clinical trial periods. The labels do not typically provide an individualized or personal expected timeline for improvement.

Q: If I miss a day of Vermine, does it affect the overall result?

Official drug labels provide specific instructions for managing a missed dose of Vermine. These guidelines typically advise taking the dose as soon as it is remembered unless it is almost time for the next scheduled dose. Following these instructions is intended to maintain the consistency of treatment.

Q: Can Vermine interact with over-the-counter pain relievers?

Official drug interaction lists focus primarily on agents that significantly affect the heart, blood pressure, or key metabolic enzymes. If a common over-the-counter pain reliever is not specifically listed in the regulatory documents, its interaction with Vermine is considered either not significant or not formally documented in the official labels.

Q: Is it typical for Vermine to cause changes in sleep patterns?

Official regulatory lists document adverse reactions classified by frequency. Since changes in sleep patterns, such as insomnia or excessive somnolence, are not listed among the reported side effects, this effect is not officially reported in the product information.

Q: Does Vermine have a risk of dependence or addiction?

Regulatory documents include a section dedicated to drug abuse and dependence. The official product information states whether the medicine has any known potential for abuse or dependence, which is determined through formal assessment.

Q: Why do some people say Vermine causes weight gain/loss?

Official regulatory lists document adverse effects that occurred with a classified frequency in clinical trials. If weight gain or weight loss is not listed among the common or uncommon side effects, then this effect is not officially reported or classified as a frequent adverse reaction in the product information.

Q: Is there a generic version of Vermine available?

The availability of an authorized generic product is documented in public regulatory records, such as the FDA Orange Book. A factual answer regarding the generic status of Verapamil Hydrochloride can be provided based on its regulatory authorization.

Q: Are there specific times of day when Vermine is intended to be taken?

Official dosing instructions specify the frequency (e.g., once daily or three times daily) and the relation to meals (e.g., taken with food). Any specific time of day for administration is typically left to clinical judgment, unless the label specifies otherwise.

Q: Is it normal to feel tired when first starting Vermine?

Official regulatory lists document adverse reactions that occurred with a classified frequency. If symptoms like tiredness or fatigue are not specifically listed among the side effects, then this effect is not officially reported in the product information as a typical occurrence.

Q: Can Vermine affect fertility in men or women?

Regulatory documents contain a section on non-clinical toxicology, which includes research findings regarding impairment of fertility. This section provides a factual summary of what has been observed in studies concerning the medicine's potential effects on reproduction.

Q: How long does Vermine stay in the body after I stop taking it?

Pharmacokinetic data, including half-life and clearance rates, are formally documented in the regulatory material. This information provides the factual basis for how long the drug's active ingredient remains present in the systemic circulation after discontinuation.

Q: Does the drug label for Vermine mention anything about mood changes?

Regulatory documents categorize adverse events by body system, including psychiatric disorders. Mood changes, such as anxiety or depression, would be listed in this section if they were officially reported as a side effect with a classified frequency.

Q: Can taking Vermine affect the results of lab tests?

Regulatory documents note specific cases where a medicine may interfere with laboratory or diagnostic test results. If the official labels do not specify an impact on common lab tests, then no known interference is formally documented.

Q: Are there differences in how Vermine works for men versus women?

Official regulatory documents, including clinical study summaries and pharmacological sections, may include analysis of the drug's effects across different patient subgroups. If no differences are specifically noted, the documents do not specify differences in how Vermine works based on sex.

Q: If I am taking an herbal tea, could it interfere with Vermine?

Vermine is formally documented as an inhibitor of the CYP3A4 enzyme, which plays a role in processing many different substances. While specific herbal teas may not be listed, co-administration of products that affect this enzyme pathway should be considered in a medical assessment.

How should Vermine be stored and disposed of?

How to Store and Dispose of Vermine?

The storage and disposal of Vermine (Ivermectin) must adhere strictly to the conditions established in official government-approved labeling to ensure product stability and environmental protection.

Storage and Handling Requirement Official Instruction
Temperature Store at controlled room temperature, typically between 15 C and 30 C (59 F and 86 F). Do not freeze.
Environmental Protection Keep the container tightly closed, stored in the original packaging, and protected from light and moisture.
Child Safety Mandatory: Keep this medication out of the sight and reach of children and pets.
Disposal Method The preferred method for discarding unused or expired product is a drug take-back program.
Environmental Restriction Do not flush the tablets down the toilet or pour them down the sink, as this risks environmental contamination.

If a take-back program is unavailable and the drug is not on the FDA flush list, the unused medicine must be mixed with an undesirable substance (such as used coffee grounds or cat litter), sealed in a container, and placed in household trash.

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

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