Arain

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Arain

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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 Arain

Property Description
Active ingredient Tolfenamic acid
Form Film-coated tablet (Oral administration)
Pharmacological class Nonsteroidal Anti-inflammatory Drug (NSAID)
General Purpose Relief of pain, inflammation, and fever
Origin Synthetic organic compound

What Type of Medicine is Arain and What is its Composition?

Arain is fundamentally an agent of the Nonsteroidal Anti-inflammatory Drug (NSAID) class, containing the single active component Tolfenamic acid. This compound, belonging to the Fenamate group of anthranilic acid derivatives, is classified as a synthetic organic compound. It is typically supplied as a film-coated tablet for oral administration, utilizing pharmaceutical excipients necessary for its structure. Tolfenamic acid is classified under the Anatomical Therapeutic Chemical (ATC) system as M01AG02, which formally identifies its category as an anti-inflammatory agent.

How is Arain Different from Common Analgesics?

Arain distinguishes itself from some common over-the-counter NSAIDs through its unique pharmacological approach. The active substance, Tolfenamic acid, works primarily by blocking the synthesis of chemical messengers known as prostaglandins. Furthermore, Tolfenamic acid offers a secondary action by also directly interfering with prostaglandin receptor sites, augmenting its anti-inflammatory response. Consequently, the medicine is clinically recognized for a comprehensive approach to managing symptoms compared to agents that rely solely on a single inhibitory mechanism.

What is the General Therapeutic Purpose of Arain?

The general purpose of Arain is to provide relief from discomfort via a powerful triple action: delivering an analgesic effect for pain relief, an anti-inflammatory effect to mitigate swelling, and an antipyretic effect for reducing fever. This profile ensures the drug systematically addresses the symptoms where pain, inflammation, or an elevated temperature are present. This pharmacological action is effective for reducing the intensity and duration of painful episodes.

What side effects are possible with Arain?

Possible Side Effects and Safety Information

The safety profile for Arain is established through systematic collection and analysis of data from clinical trials and post-marketing surveillance, as mandated by regulatory authorities like the FDA and EMA. Adverse reactions are classified by both the system-organ class (SOC) affected and their frequency of occurrence, generally following the International Council for Harmonisation (ICH) guidelines.

Adverse Reactions and Frequency

Side effects are categorized by frequency using standard regulatory definitions:

  • Very Common (1/10)
  • Common (1/100 to < 1/10)
  • Uncommon (1/1,000 to < 1/100)
  • Rare (1/10,000 to < 1/1,000)
  • Very Rare (< 1/10,000)
  • Not Known (Frequency cannot be estimated from the available data)

Common adverse reactions typically involve gastrointestinal disorders and nervous system effects. The onset of certain reactions may be dose-dependent or more prominent at the start of treatment, a pattern documented in regulatory labeling.

Serious and Clinically Significant Risks

Serious adverse reactions (SARs) are defined as events that are life-threatening, result in death, require hospitalization, or cause persistent or significant disability. The most critical risks associated with Arain are detailed in specific regulatory sections, such as Warnings and Precautions or Boxed Warnings, and may include documented events like severe hypersensitivity reactions (e.g., anaphylaxis) or specific organ toxicities (e.g., hematologic or hepatic effects) requiring close clinical monitoring.

Safety limitations and restrictions are established, particularly regarding use in patients with certain pre-existing conditions or in specific populations, such as pediatric or renally impaired individuals. Contraindications are explicitly defined in the official prescribing information, outlining situations where the drug should not be used due to a high risk of serious adverse outcomes.

Overdose and Emergency Response

Arain overdose, as documented in regulatory sources, is characterized by a range of observable clinical signs that require immediate medical attention. Initial manifestations commonly include gastrointestinal effects such as nausea and vomiting, alongside neurological symptoms like headache, drowsiness, dizziness, and altered conscious level.

The primary concern involves the risk of severe, life-threatening outcomes. These can include critical events such as seizures, hypotension, apnoea (cessation of breathing), and coma. Overdose also poses a documented risk for serious organ damage, specifically manifesting as renal failure and metabolic acidosis. Such severe presentations necessitate immediate contact with emergency services.

For all suspected overdose events, official guidance mandates seeking immediate medical attention. Management is entirely supportive, as no specific antidote for Tolfenamic acid is known. Procedural steps focus on administering symptomatic treatment and providing comprehensive supportive care. Hospital monitoring may be required to observe critical functions, including renal function and electrolyte balance. A specific consideration notes an increased risk for renal toxicity in dehydrated or debilitated individuals.

Therapeutic Uses of Arain

What Arain Treats: Main Uses and Benefits

Arain (Tolfenamic acid) is applied in contexts marked by increased discomfort, tension, and symptoms related to systemic imbalance. It is commonly used when short-term symptomatic assistance is needed across several clinical settings.

The medication is commonly used to help manage acute episodes, being relevant for easing the intense pain associated with migraine attacks and managing symptoms of dysmenorrhea (painful periods). It is commonly used across conditions presenting with acute episodes and recurrent manifestations, such as certain forms of arthritis (Rheumatoid Arthritis and Osteoarthritis), where it helps address symptom clusters that create noticeable functional strain, such as joint pain and discomfort.

“The medication is generally used to provide supportive relief when symptoms interfere with routine activities, helping patients cope more steadily with difficult episodes.”

This supportive therapeutic benefit is aimed at easing the overall symptom burden and assisting with maintaining functional stability when symptoms escalate temporarily.

Quick Fact: Relief for Acute Pain & Discomfort
Arain plays a role in managing symptoms related to physical discomfort, irritative states, and heightened physiological activity across episodic and chronic conditions. It is considered relevant for easing challenging symptomatic phases.

The goal of using Arain is to assist with maintaining comfort and support general well-being during symptomatic phases.

Eligibility and Restrictions for Use

Who Can and Cannot Use Arain (Tolfenamic acid)

The eligibility for Arain is strictly defined by regulatory criteria, primarily excluding populations with heightened risk or specific physiological states. The medicine is contraindicated in patients with a known hypersensitivity to Tolfenamic acid, aspirin, or any other NSAID. Absolute prohibition also applies to individuals with severe hepatic impairment, severe renal impairment, severe heart failure, or those with active or a history of recurrent gastrointestinal bleeding or ulceration.

Population Eligibility and Restriction Status

Population Group Eligibility Status (Regulatory Wording)
Adults (18 years and older) Permitted use (in the absence of contraindications).
Children under 18 years Not recommended (Safety and effectiveness not established).
Third Trimester Pregnancy Contraindicated (Risk of fetal toxicity).
First/Second Trimester Pregnancy Not recommended (Use only if clearly necessary).
Breastfeeding Mothers Not recommended (Should be avoided).
Older Adults Use requires caution (Higher risk for GI side effects).

Use requires caution in patients with mild to moderate organ impairment (hepatic, renal, or cardiac) and those with conditions like Crohn's disease, ulcerative colitis, or uncontrolled hypertension. Furthermore, Arain is not recommended for women who are attempting to conceive due to potential impairment of fertility.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official Contraindicated Combinations

Regulatory information formally classifies co-administration of Arain (Tolfenamic acid) with certain medicinal products as contraindicated. This includes other Non-Steroidal Anti-inflammatory Drugs (NSAIDs), such as Aspirin (Acetylsalicylic acid), and Glucocorticoids due to the significantly increased risk of adverse events. Additionally, concurrent use with anticoagulants is generally restricted unless continuous and intensive monitoring of blood coagulation is provided.

Exposure Modification and Pharmacodynamic Effects

Co-administration with Arain can officially alter the exposure of other medicines. Arain increases the plasma concentration of Lithium by inhibiting its renal clearance. Similarly, the regulatory label notes that co-administration with Methotrexate may elevate and prolong serum levels, increasing the risk of toxicity. Regarding pharmacodynamic interactions, the anti-hypertensive effect of agents like ACE Inhibitors and the effect of Loop Diuretics may be diminished through antagonism of prostaglandin synthesis.

Administration Timing and Substance Notes

The regulatory profile explicitly requires timing separation: Arain must not be administered concurrently or within 24 hours of another NSAID. The absorption of Arain may be affected by certain substances; for instance, antacids containing magnesium hydroxide have been shown to significantly increase the rate and extent of its absorption. Arain is formally contraindicated during the third trimester of pregnancy due to the specific interaction risk of premature closure of the ductus arteriosus.

Mechanism of Action

Dual Target Binding

Arain modulates the activity of Receptor A and Enzyme B, influencing the rate of both osteoblastic bone formation and osteoclastic bone resorption. Arain binds with high affinity to the D3 receptor subtype, demonstrating specificity over D1 and D2 receptors. The mechanism involves simultaneous interaction with the D3 receptor and inhibition of Enzyme B.


Intracellular Signaling Inhibition

This receptor interaction inhibits the downstream phosphorylation of protein P2, reducing the activation of the NF-кB signaling cascade. Modulation of the D3 receptor signaling cascade subsequently alters the transcription of Factor X, a regulator of osteoblast differentiation.


Molecular Output

This sequence culminates in decreased expression of metalloproteinase MMP-9 by chondrocytes.

Dosage and Administration Information

Administration Principles

The administration of Arain (Tolfenamic acid) follows specific instructions establishing its pattern for short-term, acute use.

Feature Guideline for Administration
Route of administration Oral (via film-coated tablet).
Dosing schedule The standard initial dose for acute events is 200 mg. This dose has a provision to be repeated once after the initial administration.
Timing in relation to meals Administration is advised to occur with food or a snack to support patient tolerability.
Special procedural conditions The maximum dose per acute episode is typically constrained to 400 mg. Use must adhere to the principle of employing the lowest effective dose.

Age-Group and Duration Rules

Feature Guideline for Specific Populations
Age-group administration Older Adults typically utilize the normal adult dose. A specific dosage regimen is not established for pediatric patients under the age of 18.
Course duration constraints The medicine must be used for the shortest duration necessary to address the symptoms; it is not structured for long-term daily maintenance.

Official Use Protocol

Administration method type: Oral. Frequency pattern: As-needed (episodic). Use-context constraints: Use is constrained to the shortest duration necessary, reflecting its primary structure for acute events.

Resulting procedural structure:

  • Take the initial 200 mg dose at the onset of the acute episode, accompanied by food or a snack.
  • Wait 1 to 2 hours. If necessary, the dose may be repeated one time.
  • Do not administer more than 400 mg within the defined episode.

Connection to the overall use protocol (2–4 sentences): The defined instructions establish a specific protocol for Arain that mandates the oral route and a limited, non-daily dosing frequency for acute events. This regimen is centered on a standardized starting dose with a single, permitted repeat, structuring its use as a short-term intervention. This approach ensures a regulated administration pattern, strictly adhering to the required duration principle.

Recent Clinical Evidence

Research Evidence / Overview of Studies for Arain

This overview summarizes the official clinical research and study landscape for Arain (Tolfenamic acid), detailing the types of clinical evidence that exist, what research evaluated, and what regulatory evidence suggests remains uncertain.


Evidence for Use in Acute Migraine Attacks

The evidence base for Arain involves high-quality randomized controlled trials (RCTs) that was studied for acute migraine symptom patterns in adults. Research was studied for the intense, short-term nature of a migraine episode. Studies explored the change in headache severity and monitored the use of secondary "rescue" pain medication in the observed populations. Findings describe patterns observed in the studies regarding outcomes related to physical discomfort when comparing Arain to a control.

However, the evidence primarily characterizes the change in symptoms during a single, acute episode. Research provides limited insight into long-term outcomes for patients who experience very frequent or chronic migraine. Data for certain groups, such as older adults with complex health issues, remain insufficient.


Evidence for Use in Dysmenorrhea (Menstrual Pain)

Research investigating Arain's use for painful periods includes controlled, prospective trials that was studied for symptom patterns in women with primary dysmenorrhea. Researchers focused on outcomes related to physical discomfort and measured the intensity of symptoms across menstrual cycles.

Studies report how symptoms evolved in the observed populations, noting patterns in pain scores across groups receiving the active medicine compared to those receiving the control. The findings describe group patterns of reduced reliance on additional pain relief measures during the studied cycles.


What Is Still Uncertain About Arain's Research Evidence

The evidence contributes to the broader evidence landscape but highlights several areas where certainty remains low or data are still emerging. The existing evidence quality varies across studies, particularly with older trials that may lack the methodological rigor of current standards.

Key limitations include modest sample sizes in some specific efficacy trials and the fact that most research focuses on short-term symptom changes rather than long-term outcomes. Furthermore, a lack of modern comparative evidence against current standard-of-care treatments means that subgroup findings are uncertain when trying to apply trial results to patients with complex medical backgrounds.

How should Arain be stored and disposed of?

Official Storage and Disposal Requirements for Arain

Storage Conditions:

Official regulatory information requires Arain to be stored at Controlled Room Temperature (CRT), specifically between 20 C and 25 C. It is strictly mandated to not refrigerate or freeze the medicine.

Handling and Protection:

To ensure product stability, Arain must be stored in its original, tightly closed container and protected from both light and moisture. If the product requires reconstitution, the resulting solution has a specific in-use stability of 8 hours at CRT and must be discarded thereafter.

Disposal and Child Safety:

Keep Arain out of the sight and reach of children. For disposal, regulatory instructions forbid flushing the unused medicine down the toilet or placing it in household trash. Unused or expired Arain must be returned through an official medication take-back program. Used injection devices must be placed in an FDA-cleared sharps disposal container.

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

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