Pasedol Ecar

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Pasedol Ecar

Method of action: Antiemetic

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 Pasedol Ecar

Property Description
Active ingredient Dimenhydrinate
Form Oral tablets
Pharmacological class Antihistamine; H1-receptor antagonist
Common use Relieving symptoms of motion sickness and vertigo
Origin Synthetic drug

The Classification and Identity of Pasedol Ecar

Pasedol Ecar is an oral pharmaceutical preparation containing the single active ingredient Dimenhydrinate (INN). This compound is formally classified as a first-generation antihistamine that functions as an H1-receptor antagonist. Clinically recognized for its effects on the central nervous system, this classification identifies its core mechanism as modulating the histamine response in the brain. The product is a synthetic drug, supplied as an oral dosage form, typically in tablets, confirming the convenient route of administration for managing acute motion-related discomfort.


What is the Active Ingredient in Pasedol Ecar?

The active compound, Dimenhydrinate, is chemically defined as a unique salt combination consisting of the therapeutic agent diphenhydramine and the central nervous system stimulant 8-chlorotheophylline. This dual-component structure differentiates the substance from pure diphenhydramine formulations. In the final tablet form, this active substance is integrated with various solid excipients—non-active materials like fillers and binders—that ensure the preparation’s stable structure and accurate dosing.


Pasedol Ecar’s General Therapeutic Purpose

The fundamental purpose of Pasedol Ecar is to provide relief by modulating key pathways related to balance and motion. This is achieved through the compound’s potent effect on the vestibular apparatus—the balance organ located in the inner ear. By inhibiting the nerve impulses that signal motion disturbances, the drug generally helps to relieve feelings of dizziness, unsteadiness, and nausea associated with activities such as travel. Dimenhydrinate is categorized as an antiemetic drug. This confirms the medicine's official and established role in controlling vomiting and nausea across various clinical settings.

Regulatory References

  1. NIH/MedlinePlus on Dimenhydrinate
  2. WHO Model List of Essential Medicines

What side effects are possible with Pasedol Ecar?

Possible side effects and safety information

The safety profile of Pasedol Ecar, which contains Dimenhydrinate, is largely defined by its classification as a first-generation antihistamine, resulting in effects on the central nervous system and anticholinergic activity. The official regulatory documents classify the occurrence of possible adverse reactions into frequency categories.

Key Safety Classifications and Frequencies

Component Classification Example Adverse Reaction
Very Common ge 1/10 Drowsiness (Sedation)
Common ge 1/100 to <1/10 Headache, Dry Mouth, Dizziness

The most frequently reported effect is drowsiness, which is formally classified as a very common reaction in regulatory documents, often being more pronounced at the beginning of treatment.

System-Organ Classes and Serious Reactions

Adverse effects are documented across various system-organ classes, including Nervous System Disorders (e.g., sedation, dizziness, unsteadiness), Gastrointestinal Disorders (e.g., dry mouth, constipation), and Cardiac Disorders (e.g., tachycardia, palpitations). Serious adverse reactions, though rare, include severe hypersensitivity reactions (e.g., anaphylaxis). The drug may also mask symptoms of ototoxicity when used concurrently with certain ototoxic medications, a recognized safety constraint.

Population-Specific Safety Considerations

Official labeling notes specific risk patterns for certain groups. Older adults may exhibit increased susceptibility to CNS effects (confusion, sedation) and anticholinergic effects like urinary retention. In pediatric patients, there is a recognized risk of paradoxical central nervous system stimulation, which can manifest as agitation or restlessness instead of sedation.

Overdose and Emergency Response

Overdose and when to seek help

The official regulatory documentation for Pasedol Ecar (dimenhydrinate) describes specific manifestations associated with acute overdosage, primarily affecting the Central Nervous System (CNS) and the cardiovascular system.

Documented Manifestations

Overdose presentations are documented to include CNS effects such as excitation, agitation, hallucinations, and profound confusion, which may progress to deep drowsiness, loss of consciousness, or coma. Additional signs include anticholinergic effects, specifically fixed and dilated pupils, dry mouth, and urinary retention. Overdosage can also affect the heart, resulting in tachycardia (rapid heartbeat) and serious cardiac rhythm disturbances.

Severe Outcomes and Emergency Action

Life-threatening outcomes such as seizures, respiratory depression, coma, and death are recognized complications of overdosage. These risks are notably higher in pediatric patients, who are more susceptible to CNS stimulation, increasing the potential for convulsions. Regulatory authorities mandate that immediate medical attention or contact with a Poison Control Center must be sought right away for any suspected overdosage. Immediate medical help is required for the onset of severe symptoms, including trouble breathing, seizures, or collapse. Treatment for overdosage is defined as symptomatic and supportive, as no specific antidote is known.

Therapeutic Uses of Pasedol Ecar

Quick Facts: Uses of Pasedol Ecar

  • May be used to manage or prevent the symptoms of motion sickness.
  • Intended for use in addressing nausea, vomiting, and dizziness associated with motion.

Pasedol Ecar (also known by the generic name dimenhydrinate) is a medication that is indicated for the prevention and management of symptoms associated with motion sickness. The drug is used to help address motion-induced symptoms, including feelings of nausea, episodes of vomiting, and dizziness, which can occur during travel.

This medication is employed as a therapeutic option to support individual comfort during activities such as flying, sailing, or car travel. Its mechanism of action is intended to reduce the sensory signals that contribute to these feelings of imbalance and sickness.

Healthcare providers may also determine its use for other related conditions as part of a therapeutic plan to manage symptoms of inner ear disturbances that affect balance and equilibrium. Use of this medication should always be discussed with a qualified healthcare professional.

Regulatory References

  1. FDA MedlinePlus guidance on Dimenhydrinate

Eligibility and Restrictions for Use

Official Eligibility and Restrictions for Pasedol Ecar (Dimenhydrinate)

Regulatory documents strictly define the populations eligible to use Pasedol Ecar, based on contraindications and conditional use requirements.

Population Eligibility Status Official Regulatory Status
Absolute Contraindication Patients with known hypersensitivity to dimenhydrinate or its components, narrow-angle glaucoma, prostatic hypertrophy, chronic lung disease, or those currently using a Monoamine Oxidase Inhibitor (MAOI).
Age-Related Eligibility Permitted for adults, adolescents, and children 2 years of age and older. Use is generally not recommended in children under 2 years of age.
Conditional Use (Caution) Required for older adults, and patients with a history of seizure disorder or conditions aggravated by anticholinergic effects. Caution is also advised for those with hepatic impairment (liver) or renal impairment (kidney).
Reproductive Status Small amounts are excreted into human milk, requiring a decision to discontinue the drug or discontinue nursing. The medicine is classified as Pregnancy Category B by the FDA.

These official statements define non-eligibility and conditional boundaries for use. The regulatory profile establishes absolute prohibitions based on disease state and concurrent medication use, and specifies caution for patients with organ impairment or those in geriatric age groups.

What should I know about interactions with other medicines?

The official interaction profile for Pasedol Ecar (Dimenhydrinate) is dominated by Pharmacodynamic Interactions, which result in additive effects when co-administered with specific medicinal product categories. The regulatory label formally restricts combination with alcohol and other CNS Depressants, including sedatives, hypnotics, and tranquilizers, due to the risk of additive central effects. This also applies to Narcotic Analgesics and Barbiturates, whose central effects are significantly enhanced.

A primary regulatory constraint establishes that Pasedol Ecar must not be administered with any other preparations containing diphenhydramine, as Dimenhydrinate is a salt of this compound. A specific timing restriction is also mandated: use must be avoided within 14 days of taking Monoamine Oxidase Inhibitors (MAOIs).

Further interactions include the potentiation of anticholinergic effects when combined with Anticholinergic Drugs, Tricyclic Antidepressants, and Anti-Parkinsonian Drugs. A clinically significant interaction involves the medicine’s potential to mask the early symptoms of ototoxicity caused by aminoglycoside antibiotics.

Regarding specific populations, regulatory notes indicate that elderly patients and individuals with renal impairment may be more susceptible to accumulation or heightened effects arising from these documented interactions. The administration is also contraindicated in patients with porphyria and those under 2 years of age.

Mechanism of Action

Pasedol Ecar, an analgesic and antipyretic agent, acts primarily through inhibition of cyclooxygenase (COX) enzymes, specifically COX-1 and COX-2, within the central nervous system. This molecular interaction, where the drug binds to and inactivates the enzymes, prevents the enzymatic conversion of arachidonic acid into prostaglandin H2 (PGH2). The subsequent reduction in the synthesis of prostaglandins ( PGE2 and others) in the hypothalamus leads to a diminished effect on the thermoregulatory set-point, which constitutes the systemic antipyretic action.

Simultaneously, the decreased prostaglandin synthesis, especially at sites of local tissue signaling, modulates the generation of pain signals. This involves a dampening of peripheral and central nociceptive sensitization that is mediated by prostaglandins, resulting in the systemic analgesic consequence. The compound exerts minimal anti-inflammatory effects due to its limited COX inhibition in peripheral tissues.

Dosage and Administration Information

How to Use Pasedol Ecar

Pasedol Ecar is an oral pharmaceutical preparation containing Dimenhydrinate. The administration of this medicine is guided by specific instructions concerning route, dosing frequency, and required timing. While the most common route is oral (tablet, liquid, or chewable form), the active ingredient is also available for intramuscular (IM) and intravenous (IV) administration in certain clinical contexts.

Oral administration is typically used on an intermittent, as-needed basis. For adults and adolescents 12 years and older, the standard single dose is 50 mg to 100 mg, administered every 4 to 6 hours. The total dosage taken within a 24-hour period should not exceed 400 mg. Pediatric patients have specific dosing regimens based on age group; for instance, children aged 6 to under 12 years are given 25 mg to 50 mg every 6 to 8 hours, with a maximum limit of 150 mg in 24 hours.

Administration Timing and Preparation

A critical instruction for proper use is the timing of the dose. To aid in prevention, the medicine must be taken 30 minutes to 1 hour before the activity is initiated. The oral tablet or liquid form may be taken with or without food. If the injectable form is utilized, a 50 mg dose requires dilution with 10 mL of 0.9% Sodium Chloride Injection, USP, and must be injected slowly over at least two minutes. If a scheduled dose is missed, it should be taken as soon as it is remembered; however, if it is near the next scheduled dose, the missed dose is skipped. These procedures and limits constitute the standardized protocol for use.

Recent Clinical Evidence

Pasedol Ecar: Recent Clinical Evidence

Evidence for Use in Motion Sickness

Research explored Pasedol Ecar for motion sickness using randomized, placebo-controlled trials and controlled human motion models. These studies examined the changes in subjective symptoms (nausea, vomiting, dizziness) and objective physiological markers. The research, primarily on healthy adult volunteers, reported measurements of changes in symptom severity during the defined study interval. Research is acute, focusing on effects observed in the minutes to hours following a single administration. Evidence is limited regarding long-term outcomes or prolonged prophylaxis.


Evidence for Use in Vertigo and Associated Symptoms

Pasedol Ecar was evaluated in studies exploring vertigo and related nausea using RCTs and systematic reviews. Trials monitored changes in vertigo intensity and associated symptoms, typically over short-term periods up to four weeks. Findings indicate that a significant body of the published research describes patterns observed when Pasedol Ecar was used as a component of a fixed-dose combination product with another active substance. Studies focusing exclusively on monotherapy were noted in some systematic reviews to be less common than research on the combination product.


Long-Term Studies and Duration of Follow-Up

Research largely covers the acute phase (hours) or the short-term (up to four weeks). The follow-up durations were limited, and there is limited information for long-term outcomes or the durability of any observed response beyond the original study intervals.


Evidence in Special Populations

Children and older adults have been included in some studies. However, data for certain groups remain insufficient in the primary research base, including specific findings for patients with complex comorbid conditions or pregnancy-related populations.


Comparative Studies and Research Context

Comparative evidence was evaluated in studies that monitored the drug against both placebo and other active medications. Research examined outcomes related to systemic imbalance, helping to contextualize Pasedol Ecar. Studies reported that observed symptom patterns varied between Pasedol Ecar and some comparators.


What is Still Uncertain About Pasedol Ecar

The evidence highlights what is known and what is still uncertain about the research evidence for the drug. Long-term effects are not fully established, and certainty remains low in specific areas where comparative evidence is lacking, or where combination product data complicates isolating the precise findings for the single agent.

Key Studies & References

  1. Comparative Effectiveness of Betahistine vs Dimenhydrinate in Reducing Dizziness Handicap Scores in Patients with Peripheral Vestibular Disorders: A randomized control trial
  2. Dimenhydrinate Drug Label Information (DailyMed/NIH) – Regulatory and Usage Details

Frequently Asked Questions (FAQ)

Common questions about Pasedol Ecar (FAQ)

Q: How do I properly dispose of Pasedol Ecar liquid or injectable forms?

Official guidance recommends disposing of unused or expired medicine through a local drug take-back program. If a program is not available, regulatory guidance suggests mixing liquid or injectable forms with an undesirable substance, such as used coffee grounds or kitty litter. The mixture is then typically placed in a sealed container before disposal in household trash, according to standard recommendations. It is important not to flush this medication down the toilet or pour it down a drain unless specifically instructed to do so by the manufacturer or a regulatory agency.

How should Pasedol Ecar be stored and disposed of?

Official Storage Requirements

Pasedol Ecar (Dimenhydrinate) must be stored at controlled room temperature, maintaining a range of 20 C to 25 C (68 F to 77 F). The medication requires protection from excessive heat and moisture; therefore, official labeling warns against storage in environments like the bathroom. To maintain product stability, the tablets must remain in the original container and the container must be kept tightly closed.

Child Safety and Disposal

It is mandatory to store this medication strictly out of the sight and reach of children, utilizing child-resistant packaging where provided. For disposal of unused or expired tablets, the official regulatory instruction recommends using a local drug take-back program. If this is unavailable, the product must be mixed with an undesirable substance, sealed in a container, and disposed of in household trash. The medication must not be disposed of by flushing down a toilet or pouring into wastewater.

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

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