Equagesic

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Equagesic

Treatment option: Pain, Anxiety&Panic Attacks

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 Equagesic

Quick Facts

Property Description
Active Ingredients Acetylsalicylic Acid (ASA), Meprobamate
Form Oral Tablet
Pharmacological Class Analgesic (NSAID) and Centrally Acting Skeletal Muscle Relaxant
Origin Synthetic Compound
Prescription Status Prescription-only Medication (Rx)

What Type of Medicine Is Equagesic?

Equagesic is a prescription-only medication classified as a fixed-dose combination (FDC) product, combining an Analgesic (NSAID) with a Centrally Acting Skeletal Muscle Relaxant. This synthetic compound is presented as an oral tablet, distinguishing it from single-agent pain therapies. Its dual pharmacological class is the primary differentiating feature: it merges the pain-relieving action of an NSAID with a central muscle-tension reducing agent. This combination approach is clinically recognized for providing enhanced relief in cases where muscle spasm contributes significantly to the overall discomfort.

Composition and Form: Acetylsalicylic Acid and Meprobamate

The medication's identity rests on its two principal active ingredients: Acetylsalicylic Acid (ASA) and Meprobamate. Acetylsalicylic Acid is an NSAID, whereas Meprobamate is a carbamate derivative that acts specifically as a Centrally Acting Skeletal Muscle Relaxant. Meprobamate is classified pharmacologically as a minor tranquilizer and muscle relaxant. This composition targets both pain signals and involuntary muscle tightness simultaneously.

The General Purpose of This Combination Drug Formulation

The general purpose of this specific combination drug formulation is to provide enhanced pain management for adult patients experiencing discomfort complicated by muscle spasm and tension. The integration of an analgesic and a muscle relaxant creates a desired synergistic effect. This dual approach is particularly useful for managing acute episodes of musculoskeletal pain, such as those arising from an injury or severe tension-type headache. By utilizing both ASA for peripheral pain relief and Meprobamate for central tension reduction, the medicine offers a comprehensive strategy for discomfort that traditional single-ingredient analgesics cannot fully address.

What side effects are possible with Equagesic?

Possible Side Effects and Safety Information

The regulatory safety profile of Equagesic, a combination of Acetylsalicylic Acid (ASA) and Meprobamate, reflects the risks associated with both components. The adverse reactions are primarily classified across two major systems: the Central Nervous System (CNS) and the Gastrointestinal (GI) tract.

Adverse Reaction Classifications

Side effects that are generally classified as common in official documents include CNS effects like drowsiness and dizziness (Meprobamate), and GI effects such as heartburn, nausea, and dyspepsia (ASA).

Reactions affecting the Nervous System and the Psychiatric system are documented, including the potential for physical and psychological dependence associated with Meprobamate, particularly with prolonged use or high doses. Gastrointestinal disorders range from minor discomfort to serious events, reflecting the potential for GI bleeding, ulceration, and perforation associated with the NSAID component, which are documented as serious adverse reactions.

Serious Safety Considerations

Official labeling highlights several safety constraints and serious adverse reactions. The risk of dependence and withdrawal symptoms upon cessation is a primary concern with Meprobamate. Severe allergic reactions, including anaphylactic shock and severe skin reactions, have been reported for both active ingredients. The medicine is contraindicated in patients with conditions such as known hypersensitivity to either active component or acute intermittent porphyria.

Population-Specific Safety

Safety constraints are specific to certain populations. Older adults face an increased risk of serious adverse reactions, particularly severe GI bleeding and exacerbated CNS effects. Use of the ASA component in the pediatric population during certain viral illnesses carries the risk of Reye's syndrome. Furthermore, the label notes that the Meprobamate component may impair the mental and physical abilities required for operating machinery, structuring the understanding of its functional impact.

Overdose and Emergency Response

Overdose and When to Seek Help

Overdose involving Equagesic (meprobamate and aspirin) can lead to severe adverse events, including CNS depression from the meprobamate component and salicylate intoxication from the aspirin component.

Immediate medical attention is necessary if an overdose is suspected. Specific emergency procedures, such as immediate gastric lavage and appropriate supportive therapy, are explicitly stated for use in cases of suicidal attempts. Prompt action is crucial due to the potential for serious physiological consequences.

Documented manifestations of overdose affect multiple bodily systems and may include:

  • Central Nervous System: Confusion, slurred speech, sedation, drowsiness, dizziness, seizures, and potentially coma or cerebral edema.
  • Respiratory/Metabolic: Hyperpnea (fast or deep breathing), respiratory alkalosis, metabolic acidosis, and pulmonary edema.
  • Other Significant Signs: Tinnitus (ringing in the ears), various arrhythmias, hypotension, gastrointestinal bleeding, and severe vomiting.

Risk of severe CNS depression is increased when Equagesic is combined with other central nervous system depressants, such as alcohol, general anesthetics, narcotic analgesics, or tranquilizers. Children who exhibit symptoms like severe drowsiness, changes in behavior, or fast/deep breathing may also be experiencing overdose and require urgent evaluation.

Therapeutic Uses of Equagesic

Equagesic is relevant for symptomatic relief across certain domains of discomfort in adult patients. The medication is applied in situations involving symptomatic discomfort. Its clinical relevance is in managing symptom patterns where physical discomfort is compounded by heightened muscular or emotional tension.

Relief of Musculoskeletal Pain and Spasm

Equagesic is commonly used to help manage symptoms related to physical discomfort arising from musculoskeletal pain that is complicated by involuntary muscle spasm and tension. This provides support that helps ease the overall symptom burden, particularly during acute or episodic changes, contributing to improved comfort.

Support for Tension-Related Discomfort

The medication is relevant in clinical settings that involve acute or unstable symptom patterns, such as those related to headache pain with muscular tension, or in situations where symptoms of increased neurological or muscular activity (tension or anxiety) cluster together with pain. It is used when these symptom patterns create noticeable interference with daily stability. The approach offers symptomatic relief that helps patients cope more steadily with difficult episodes of discomfort.


Quick Fact: Relief for Pain and Tension
Equagesic is relevant for symptomatic relief in contexts marked by increased discomfort or tension, applied in clinical settings that involve acute or unstable symptom patterns. It supports patients during episodes of heightened discomfort by managing the combined symptom load.

Eligibility and Restrictions for Use

Eligibility Scope

The use of Equagesic is primarily for adult patients and is defined by strict governmental regulations regarding contraindications and patient characteristics.

Classification Rule
Populations for whom use is contraindicated Patients with Acute Intermittent Porphyria or known allergic reactions to aspirin, meprobamate, or related compounds.
Individuals with the Asthma, Rhinitis, and Nasal Polyps syndrome must not use this medicine.

Age-Related Eligibility Rules

The medicine is not recommended for use in children 12 years of age and under as safety and efficacy have not been established. Furthermore, the aspirin component is absolutely prohibited for use in children or teenagers with viral infections (such as flu or chickenpox) due to the risk of Reye's syndrome.

Condition-Specific Eligibility

Caution is required for patients with impaired liver or kidney function to prevent drug accumulation. Restricted use also applies to elderly or debilitated patients, as well as those with coagulation disorders or a history of gastrointestinal bleeding.

Pregnancy and Lactation Status

Use is avoided in pregnant women at 30 weeks gestation and later. Due to excretion into breast milk, nursing mothers should use the medicine with caution or avoidance.

What should I know about interactions with other medicines?

Equagesic Interactions with other medicines and products

Equagesic is a combination product containing meprobamate and aspirin, which contributes to multiple documented interactions. All patients must be advised that the effects of Equagesic may be additive with other Central Nervous System (CNS) depressants.


Documented Interaction Categories

Product Category Interaction Mechanism / Effect
CNS Depressants (e.g., alcohol, sedative-hypnotics, tranquilizers, narcotic analgesics) Additive CNS depression (enhanced effects)
Anticoagulants (e.g., Warfarin, Heparin) Increased risk of bleeding due to effects on platelets and possible displacement from protein binding sites.
ACE Inhibitors and Beta-Blockers Diminished hypotensive effects of these agents, possibly due to the aspirin component inhibiting renal prostaglandins.
Corticosteroids Withdrawal of long-term concomitant therapy may lead to salicylism because corticosteroids enhance the renal clearance of salicylates.
Diuretics Reduced effectiveness of the diuretic, possibly due to the aspirin component inhibiting renal prostaglandins.
Other NSAIDs/Salicylates (including over-the-counter products) Increased risk of gastrointestinal irritation, bleeding, and toxicity.
Acetazolamide Increased serum concentrations and potential toxicity of acetazolamide due to competition for renal tubule secretion.
Anticonvulsants (e.g., Phenytoin, Valproic acid) Altered serum levels (e.g., salicylates can displace protein-bound phenytoin and valproic acid).

Interaction-Related Restrictions and Considerations: The simultaneous use of this product with alcohol is strongly discouraged due to an additive effect that increases both CNS depression and the risk of gastrointestinal bleeding associated with the aspirin component. Patients with a predisposition for GI bleeding should be particularly cautioned. The use of this product is typically avoided in combination with other products containing aspirin or salicylates. For elderly or debilitated patients, caution and close monitoring are necessary when considering co-administration with interacting agents.

Mechanism of Action

Equagesic is a combination pharmaceutical consisting of two distinct molecules, meprobamate and aspirin, each with separate pharmacodynamic mechanisms.

Meprobamate primarily modulates inhibitory neurotransmission in the central nervous system (CNS), targeting the GABA A receptor complex. It functions as a positive allosteric modulator, binding to an allosteric site on the GABA A receptor, which is a ligand-gated chloride ion channel. This interaction increases the frequency of chloride ion channel opening upon binding of the endogenous neurotransmitter gamma-aminobutyric acid (GABA). The resulting influx of negatively charged chloride ions induces neuronal hyperpolarization, which decreases the overall excitability of targeted neurons, particularly within the limbic system and thalamus, leading to systemic CNS depression.

Aspirin (acetylsalicylic acid) acts as an irreversible non-selective inhibitor of the cyclooxygenase (COX) enzymes, specifically COX-1 and COX-2. It achieves this by covalently acetylating a serine residue in the active site of both isoforms. The inhibition of COX prevents the enzymatic conversion of arachidonic acid into prostanoid mediators, including prostaglandins and thromboxane A2 ( TXA2). Reduced synthesis of prostaglandins modulates nociceptive signaling at peripheral and central sites, and reduced TXA2 production in anuclear platelets impairs platelet aggregation.

Dosage and Administration Information

How to Use Equagesic

Equagesic (meprobamate and aspirin) is a fixed-dose combination product intended for oral administration as a tablet. Standard instructions detail a specific, limited usage pattern based on the drug's composition, which includes 200 mg of meprobamate and 325 mg of aspirin per unit.


Official Dosing and Frequency

The standard administration pattern for adults is one or two tablets taken orally per dose. The medication is used on an as-needed basis, within the maximum frequency of three to four times daily. This schedule establishes the drug's use as intermittent, contingent upon symptomatic need, rather than as a continuous or prophylactic regimen.


Administration Constraints and Duration

Equagesic is designed for short-term treatment only and is explicitly not intended for use longer than 10 days. This time limit defines the required acute-use context for the medication. Instructional guidance does not specify intake in relation to food (e.g., with or without meals).

Population-Specific Guidelines

Administration rules are structured to exclude certain patient groups. The medication is not recommended for patients 12 years of age and under. Furthermore, caution should be exercised in administering the drug to patients with compromised liver or kidney function, due to the metabolic and excretory pathways of the meprobamate component.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Equagesic (ASA/Meprobamate)

The clinical evaluation of Equagesic, a fixed-dose combination of Acetylsalicylic Acid (ASA) and Meprobamate, was primarily documented through historical controlled studies that are summarized in regulatory materials. This research base provides context on how the product was studied and the types of outcomes that were measured, primarily focusing on short-term, acute symptom patterns in adult patients. The findings describe group patterns and contribute to the broader evidence landscape but research does not determine whether an individual will respond similarly.


Evidence for Short-Term Treatment of Pain with Co-occurring Tension

Research was conducted to examine the combination in patients whose physical discomfort from musculoskeletal disease was associated with heightened symptom activity described as tension and/or anxiety.

What Researchers Studied

The core evidence includes short-term Randomized Controlled Trials (RCTs). These studies included adult patients with musculoskeletal discomfort. Researchers monitored patient-reported outcomes describing perceived discomfort and assessed comparative analgesic efficacy. A key comparator in these studies was aspirin (ASA) alone.

What the Studies Reported

Studies reported comparative measurements of symptomatic change in pain and associated tension. Studies reported that the combination performed differently than ASA alone when measuring symptomatic change, when applied in contexts involving episodic or acute changes. This evidence contributes to understanding short-term symptom patterns.

Long-Term Data and Duration of Follow-Up

The available research evidence for this product was primarily focused on acute episodes. Clinical trials for this fixed-dose combination were conducted as short-term therapy studies, with follow-up durations being limited to the acute treatment period, typically up to 10 days.

What Remains Uncertain: Long-term effects are not fully established. There is limited information for long-term outcomes, and research provides limited insight into the durability of any observed effects or the sustained maintenance of symptom patterns beyond the short-term study periods.


Research Gaps and Uncertainty

A significant portion of the core evidence is historical, and its applicability to modern therapeutic standards is a consideration. Comparative evidence is lacking for how this combination performs against newer analgesic and muscle relaxant options. The majority of the research focused on the general adult population; data for several key groups, such as pediatric or geriatric patients, remain insufficient in the scientific literature. Evidence quality varies across studies, and the research does not determine whether an individual will respond similarly to the group patterns observed in these studies.

How should Equagesic be stored and disposed of?

How to Store and Dispose of Equagesic?

Equagesic tablets must be stored according to specific regulatory requirements to maintain product quality. Storage is mandated at controlled room temperature, specifically between 20 C and 25 C (68 F and 77 F).

Storage Conditions

Requirement Official Instruction
Temperature 20 C to 25 C (Controlled Room Temp)
Protection Protect from moisture and light
Container Store in a light-resistant, tight container; keep tightly closed
Safety Keep out of the sight and reach of children

Disposal Instructions

Unused or expired Equagesic should be disposed of via drug take-back programs if available. The medication is not recommended for disposal by flushing down the toilet. If take-back options are unavailable, regulatory instructions advise mixing the tablets with an undesirable substance (such as used coffee grounds) before sealing and discarding in the household trash. Identifying information must be scratched off the container before disposal.

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

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