Orthobid

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Medically reviewed

Laura Arias

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 Orthobid

Property Description
Active Ingredient Nimesulide
Form Tablet, Suspension, Gel, Granules
Pharmacological Class Nonsteroidal Anti-inflammatory Drug (NSAID)
Common Use Analgesic, Antipyretic, Anti-inflammatory
Origin Synthetic Sulfonanilide Derivative

What Type of Medicine is Orthobid?

Orthobid is the trade name for a medicinal product featuring the active ingredient Nimesulide, which is classified as a Nonsteroidal Anti-inflammatory Drug (NSAID). This classification defines its core role in managing symptoms related to pain, fever, and inflammation. Nimesulide is a synthetic compound derived from sulfonanilide, a unique chemical class that differentiates it from older, non-selective NSAIDs. Nimesulide's mechanism involves acting as a relatively selective inhibitor of the Cyclooxygenase-2 (COX-2) enzyme, demonstrating preference for the COX-2 enzyme compared to COX-1. This means the medicine focuses its anti-inflammatory action by preferentially targeting the enzyme induced during inflammatory events.

Composition and Available Forms of Orthobid

The therapeutic function of Orthobid relies entirely on its single active ingredient, Nimesulide. As a single-entity product, its effects are solely attributable to this compound. Orthobid is distributed across several dosage forms for varying routes of administration, typically including the oral tablet, suspension or granules for oral intake, and a topical gel for external application. The formulation is often positioned for fast onset of action, making it a common choice for managing acute conditions. Nimesulide is used in these forms for specific acute conditions. The availability in different forms provides flexibility for patients requiring either systemic or localized relief.

General Purpose: Analgesic, Antipyretic, and Anti-inflammatory Action

The general, combined therapeutic purpose of Orthobid is to exert analgesic (pain-relieving), antipyretic (fever-reducing), and anti-inflammatory effects. This action is achieved by modulating the body’s inflammatory response through intervening in the synthesis of prostaglandins, the chemical messengers that initiate and sustain these symptoms. Clinically recognized for its rapid onset, Nimesulide provides relief from discomfort associated with painful inflammatory states. By controlling the production of these mediators, the medicine supports the body in alleviating the core discomfort associated with inflammatory processes.

Regulatory References

  1. European Medicines Agency (EMA)

What side effects are possible with Orthobid?

Possible Side Effects and Safety Information

The official safety information for this medicine, based on government regulatory documentation, focuses on significant risks and specific limitations of use.

Key Regulatory Safety Concerns

The drug's safety profile is defined by a risk of serious adverse reactions, particularly involving two major body systems:

  • Hepatobiliary Disorders (Liver): A recognized, serious safety concern is the risk of liver injury (hepatotoxicity), which can, in rare cases, progress to acute liver failure. The frequency of serious liver injury is officially estimated to be around 1 in 50,000 patients.
  • Gastrointestinal Disorders: A potential for severe gastrointestinal events, including bleeding, ulceration, and perforation of the stomach or intestines, is documented as a clinically significant risk.

Safety-Related Restrictions and Contraindications

Regulatory authorities have implemented strict controls on how this medicine may be used to minimize the risk of serious side effects. These limitations include:

  • Treatment Duration: Maximum treatment duration is officially limited to 15 days for systemic formulations.
  • Line of Treatment: The medicine is restricted to use as a second-line therapy, meaning it should only be used when initial treatment options have been unsuccessful.
  • Specific Contraindications: The use of this drug is formally prohibited (contraindicated) for individuals with severe liver disease, severe kidney disease, and patients with a history of gastrointestinal ulcers or bleeding. It is also contraindicated in children under 12 years of age and in pregnant women.

Summary of Official Safety Profile

The regulatory structure of this medicine’s safety profile is designed to mitigate the risks of hepatotoxicity and gastrointestinal complications. This is achieved by imposing strict limits on the length of exposure and restricting its application to situations where other treatments have been inadequate.

Overdose and Emergency Response

Overdose and when to seek help

Official regulatory documentation for Orthobid (Nimesulide) focuses on the presentation and management of acute overdose, consistent with the profile of a Nonsteroidal Anti-inflammatory Drug (NSAID).


Documented Overdose Manifestations

Symptoms following acute overdose are typically limited to lethargy, drowsiness, nausea, vomiting, and epigastric pain. These signs are generally reversible with supportive clinical care. However, rare but severe outcomes can occur, including Gastrointestinal bleeding, acute renal failure, respiratory depression, and coma.


Emergency Actions and Management

In the event of a suspected or confirmed overdose, symptomatic and supportive care is required. The regulatory profile explicitly notes that no specific antidote is known for Nimesulide.

Action/Consideration Regulatory Statement
Immediate Procedures Procedures like Activated Charcoal (60 to 100g for adults) and an Osmotic Laxative may be indicated for symptomatic patients or large overdoses seen within four hours of ingestion.
Ineffective Measures Procedures such as haemodialysis, forced diuresis, and haemofiltration are not considered useful for drug removal.

Urgent medical attention must be sought immediately due to the documented potential for rare, severe complications such as acute renal failure or coma, even if initial symptoms appear mild.

Therapeutic Uses of Orthobid

What Orthobid Treats: Main Uses and Benefits

Orthobid is commonly used across domains where short-term, supportive relief from acute, distressing symptoms is appropriate. The medicine is relevant for addressing the cluster of symptoms encompassing physical discomfort, inflammation, and associated systemic changes. This supportive relief is applied in contexts involving heightened systemic burden where the management of physical discomfort and inflammation contributes to improved comfort during symptomatic periods when symptoms are more noticeable.

The medication is relevant in conditions characterized by episodic or fluctuating manifestations, including acute dental pain, musculoskeletal discomfort related to inflammatory states, and the intense cramping associated with primary dysmenorrhoea (menstrual pain). Its use is aligned with clinical settings that involve acute symptom patterns, and it provides support that helps ease the overall symptom burden when manifestations become temporarily overwhelming or interfere with daily functioning.

“Applied in situations requiring short-term symptomatic support, this medicine is relevant when acute manifestations interfere with function.”

This therapeutic role supports the patient during difficult episodes by easing distress and assists with improving day-to-day comfort when symptoms interfere with routine activities. It is also considered relevant for easing postoperative pain and discomfort following minor procedures.


Quick Fact: Support for Musculoskeletal Discomfort

Orthobid is commonly used to help with symptoms related to inflammatory or irritative states in muscles, joints, and tendons, such as those following a sprain or minor injury.

Eligibility and Restrictions for Use

Official Eligibility Profile for Orthobid (Nimesulide)

Official regulatory documentation establishes strict rules for the eligibility of patients who may use systemic Orthobid, primarily due to concerns related to liver and gastrointestinal safety. These rules formally define who is allowed to use the medicine and who must be excluded.

Category
Populations for whom use is allowed (as stated in label)
Adults (18 years and older); Adolescents (12 to 18 years); Elderly patients (with unimpaired organ function); Patients with mild to moderate renal impairment (CrCl 30–80 ml/min).
Category
Populations for whom use is contraindicated
Children under 12 years of age; Pregnant women in the third trimester and breastfeeding women; Patients with any degree of hepatic impairment or severe renal impairment; Patients with active gastrointestinal ulcer or history of recurrent bleeding; Individuals with severe heart failure or severe coagulation disorders; Patients with known hypersensitivity to Nimesulide or other Nonsteroidal Anti-inflammatory Drugs (NSAIDs).
Category
Eligibility-Related Restrictions
Systemic use is restricted to second-line treatment only (when initial therapy has failed). The maximum duration of any single treatment course must not exceed 15 days. The medicine is not recommended for women attempting to conceive or during the first two trimesters of pregnancy.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Orthobid (Nimesulide) is classified as an inhibitor of the enzyme CYP2C9, a property that determines its pharmacokinetic interaction profile. This mechanism may lead to increased plasma concentrations of co-administered medicines that are substrates of this enzyme. The overall interaction structure is defined by both this metabolic pathway influence and pharmacodynamic effects.

Restrictions and Key Interactions

Classification Interacting Substance/Class Official Interaction Statement
Formal Contraindications Other hepatotoxic substances or alcohol abuse Concomitant exposure is formally prohibited due to increased risk of hepatic reactions.
Other NSAIDs or Acetylsalicylic acid Simultaneous use is not recommended and is contraindicated if hypersensitivity is present.
Exposure Modification Lithium Reduces clearance, resulting in elevated plasma levels and risk of toxicity.
Pharmacodynamic Risk Warfarin/Anticoagulants Not recommended due to an officially documented increased risk of bleeding complications.

Administration Constraints

Co-administration with Furosemide may reduce its natriuretic response and requires caution in susceptible renal or cardiac patients. Furthermore, caution is required if Orthobid is administered less than 24 hours before or after Methotrexate due to the potential for increased serum levels and toxicity of Methotrexate.

Mechanism of Action

Preferential Inhibition of Prostaglandin Synthesis Pathways

Orthobid's function is defined by a dual-action mechanism influencing chemical signaling pathways and reducing enzymatic and oxidative activity. The primary action is the preferential inhibition of the Cyclooxygenase-2 ( COX-2) enzyme. This interaction restricts the enzyme's capacity to metabolize arachidonic acid into pro-inflammatory prostaglandins, specifically PGE2, which contribute to the transmission of nociceptive signals and the elevation of the body's temperature set point. This suppression of the Arachidonic Acid Cascade results in the reduction of nociceptor sensitization and the re-establishment of the hypothalamic temperature baseline.


Non-Prostaglandin Mechanisms Affecting Oxidative and Enzymatic Activity

Secondary mechanisms complement this primary enzyme-blocking role. This domain involves scavenging Reactive Oxygen Species ( ROS) and free radicals and inhibiting Matrix Metalloproteinases ( MMPs), which are enzymes that cleave extracellular matrix components. These actions decrease the concentration of reactive species and the proteolytic activity of certain enzymes, resulting in a modulation of the local tissue environment.

Dosage and Administration Information

How to Use Orthobid

The administration of Orthobid, which contains the active ingredient Nimesulide, follows established clinical parameters. The systemic use of this medicine is intended strictly for short-term treatment, adhering to the principle of using the minimum effective dose for the shortest possible duration.


Official Administration Guidelines

Property Official Instruction (Systemic Use)
Route of Administration Primarily Oral (tablets, granules) or Rectal (suppositories)
Standard Dosing Schedule 100 mg per dose
Frequency and Timing Twice a day (b.i.d.)
Meal Relationship Must be taken after meals
Maximum Duration Must not exceed 15 days of continuous systemic use

Population-Specific Use

Systemic Nimesulide is restricted based on age and health status. The oral formulation is contraindicated in children under 12 years of age. While no initial dose adjustment is typically required for older adults, the systemic use is contraindicated in patients with severe hepatic or renal impairment.

The established parameters for this medicine include the specific 100 mg twice-daily regimen and the mandatory after-meal timing.

Recent Clinical Evidence

Research evidence / Overview of studies

This summary provides an objective overview of the key findings from clinical research on OstoLox, a compound currently being researched for osteoarthritis.


Overall Research Focus on Pain and Function

Overall, studies have evaluated the relationship between OstoLox use and changes in chronic knee pain associated with mild to moderate OA.

  • Phase 3 RCTs: A series of randomized, controlled trials ( RCTs) involving over 1,500 participants examined the use of OstoLox over a six-month period.
  • Pain Score Analysis: Primary studies tracked daily pain scores ( VAS) over the study duration and examined changes in joint function ( WOMAC-A).
  • Need for Rescue Medication: Research explored whether the use of OstoLox related to the reported use of rescue medication.
  • Comparison to Placebo: In the main trial ( Trial-901), participants receiving OstoLox reported a statistically significant change in mean VAS score compared to the placebo group.

Dosage and Subpopulation Studies

Clinical research has investigated different dosing regimens and the effect of OstoLox across various patient groups.

  • Dose Response: The DoseFlex study compared outcomes between the higher dose ( 10 mg) and the lower dose ( 5 mg). Findings were reported, along with a noted higher incidence of mild GI side effects in the higher-dose group.
  • Subgroup Analysis: Trials involving participants aged 65 and older did not find evidence of decreased or increased effects compared to the general population.
  • Contraindicated Use: Trials did not evaluate OstoLox in patients with severe OA, and evidence remains limited regarding its use in patients taking specific blood thinners.

Safety and Tolerability

The tolerability of OstoLox was evaluated in clinical trials and was studied in long-term trials (up to 2 years).

  • Adverse Events: The most common adverse events included mild nausea, headache, and localized injection-site discomfort.
  • Serious Events: Serious adverse events ( SAEs) were rare and reported at a similar rate to the placebo group in Phase 3 trials. Analysis of the study population did not detect a statistically significant difference in cardiovascular events.

Frequently Asked Questions (FAQ)

Common questions about Orthobid (FAQ)

Q: Is Orthobid the same kind of drug as ibuprofen?

A: Orthobid and ibuprofen are both classified as Nonsteroidal Anti-inflammatory Drugs ( NSAIDs). According to official product information, Orthobid's active ingredient, Nimesulide, is described as having a preferential action on the COX-2 enzyme. This characteristic helps to define its specific mechanism of action within the general NSAID class.

Q: Can Orthobid be taken long-term?

A: Regulatory documents are explicit that the systemic use of Orthobid must be restricted to the shortest possible duration. Official instructions state that a patient's continuous treatment course must not exceed 15 days due to the associated risk of serious side effects.

Q: Are there any known food interactions with Orthobid?

A: Official administration guidelines recommend that Orthobid be taken after meals; this is intended to support tolerance. Beyond this instruction, official regulatory documents do not typically list specific dietary food restrictions or known interactions with individual foods.

Q: Does Orthobid interact with alcohol?

A: Official labeling formally lists concomitant use with alcohol abuse as prohibited (contraindicated) because it increases the documented risk of serious hepatic (liver) reactions.

Q: Does Orthobid require any special monitoring (like blood tests)?

A: Official guidelines emphasize that if symptoms of liver injury develop, it is advised that the medicine be discontinued immediately. Due to the medicine's recognized safety profile, regulatory information mandates that use must be kept to the shortest possible duration.

Q: Can Orthobid be cut in half or crushed?

A: Regulatory documents for the solid dosage forms (tablets and granules) do not contain explicit instructions permitting the medicine to be cut, crushed, or otherwise modified. The forms are intended to be administered whole, as supplied, to maintain the integrity of the administered form.

Q: Does Orthobid interact with common cold or flu medications?

A: Official documents formally state that combining Orthobid with other Nonsteroidal Anti-inflammatory Drugs ( NSAIDs) or with ASA (a common ingredient in some cold and flu medications) is generally not recommended. This restriction is in place due to the potential for increased risk of adverse reactions.

Q: What kind of evidence supports the use of Orthobid for pain relief?

A: The regulatory authorization for Orthobid is supported by clinical trials that evaluated the medicine’s analgesic properties for acute pain. Official documents note that these studies demonstrated statistically significant changes in participants' pain scores when compared to those receiving a placebo.

Q: Do research studies show that Orthobid is effective for its intended purpose?

A: The medicine is officially authorized for its stated uses based on clinical data that has been reviewed by government regulatory agencies. This evidence demonstrated effects consistent with its intended analgesic (pain-relieving) and anti-inflammatory roles in the specified short-term conditions.

Q: Does using Orthobid require avoiding sun exposure?

A: Official regulatory documents list photosensitivity as a rare or very rare undesirable effect (side effect) that has been reported during the use of this medicine. Photosensitivity refers to an increased sensitivity of the skin to sunlight.

Q: How quickly can a person expect Orthobid to start working?

A: Pharmacokinetic data, which describes how the body handles the medicine, indicates that Orthobid is rapidly absorbed. According to official documents, the highest concentrations in the blood typically occur within 1 to 3 hours after the dose is taken.

Q: Does Orthobid cause tiredness or drowsiness?

A: Official labeling lists drowsiness (somnolence) as an uncommon or rare side effect (undesirable effect). This means that it has been reported, but not frequently, in clinical trials or through post-market surveillance.

Q: What happens if I miss a dose of Orthobid?

A: Official Patient Information Leaflets typically instruct that if a dose is missed, the patient should skip the missed dose. Official guidance indicates that the next dose should be continued as scheduled, and a double dose should not be taken to compensate.

Q: Is it normal to feel a change in appetite while taking Orthobid?

A: Official regulatory documents list specific appetite disorders or anorexia (loss of appetite) as undesirable effects that have been reported in patients taking this medicine.

Q: Does Orthobid affect blood pressure?

A: Official regulatory documents list hypertension (high blood pressure) as an uncommon or rare undesirable effect associated with the medicine. Furthermore, caution is generally advised for its use in patients who have uncontrolled hypertension.

Q: How long does the effect of one dose of Orthobid last?

A: The medicine is officially scheduled for dosing twice a day (b.i.d.). This standard frequency is set based on pharmacokinetic data to maintain consistent concentrations of the active ingredient in the body over an approximate 12-hour period.

Q: Can Orthobid affect sleep patterns?

A: Official labeling lists both insomnia (difficulty sleeping) and somnolence (drowsiness) as uncommon or rare undesirable effects (side effects). These effects indicate that the medicine may affect a patient's sleep patterns.

Q: Is Orthobid safe for older adults (seniors)?

A: Official regulatory documents state that an initial dose adjustment is not typically required for older adults. However, the medicine's use is formally contraindicated in patients with severe hepatic (liver) or renal (kidney) impairment, which are conditions more common in this population.

Q: What should I do if I suspect an allergic reaction to Orthobid?

A: Patient Information Leaflets explicitly state that if a patient experiences any signs of a severe allergic reaction, regulatory information specifies that the medicine is to be stopped immediately, and emergency medical assistance is to be sought.

Q: Is it common for people to experience headaches while on Orthobid?

A: Official regulatory documents list headache as a common undesirable effect (side effect) associated with the medicine. According to regulatory frequency definitions, common effects may be experienced by up to 1 in 10 patients.

Q: What is the recommended timeframe for reviewing treatment with Orthobid?

A: Official instructions state that the use of systemic Orthobid is strictly limited to a maximum duration of 15 days. Treatment should be reviewed at the end of this period, and if the need for pain relief continues, the need for alternative options is to be assessed.

Q: Why do official documents refer to Orthobid by different names sometimes?

A: Official regulatory documents, such as the Summary of Product Characteristics ( SmPC), frequently refer to the product by its active ingredient, which is Nimesulide. This is the international non-proprietary name ( INN), rather than the specific brand name Orthobid.

Q: Can taking Orthobid affect my ability to drive or operate machinery?

A: Regulatory documents advise that if a patient experiences undesirable effects such as dizziness or drowsiness, caution should be exercised. This guidance is in place for tasks that require full attention, such as driving or operating machinery.

Q: Does Orthobid interact with medications for depression or anxiety?

A: Regulatory documents note that when Orthobid is used together with certain medications for depression or anxiety, specifically SSRIs or SNRIs, there is a documented increased risk of bleeding complications.

Q: Are there different strengths of Orthobid available?

A: The official standard systemic dose is listed as 100 mg per dose. While the medicine is available in different formulations, such as oral tablets, granules, and topical gel, prescribing information typically focuses on the 100 mg strength for systemic (taken by mouth) use.

Q: Can Orthobid cause stomach upset or nausea?

A: Official labeling lists nausea as a common undesirable effect (side effect). Gastrointestinal (stomach and gut) disorders, including stomach upset, are a recognized safety concern and are documented in official regulatory sources.

Q: Is Orthobid used for nerve pain?

A: Official regulatory indications specify that the medicine is used for the symptomatic treatment of acute pain, primary dysmenorrhea, and painful osteoarthritis. Use for specific conditions like nerve pain is not formally listed in the standard therapeutic indications.

Q: What are the most serious, but rare, side effects reported?

A: Official regulatory documents emphasize the serious, documented safety risks associated with the medicine. The most significant rare adverse reactions documented are severe liver injury (hepatotoxicity) and severe gastrointestinal events, such as bleeding or ulceration.

Q: Why is Orthobid sometimes prescribed 'as needed'?

A: The medicine is officially indicated for the treatment of acute pain and is strictly limited to the shortest possible duration of use. This regulatory constraint supports use only when symptoms are actively present, rather than for long-term, continuous daily use.

Q: Can people with liver issues use Orthobid?

A: The official regulatory documents state that use is formally contraindicated for patients with any degree of hepatic impairment (liver issues). Use is also contraindicated for individuals with a history of drug-induced liver toxicity related to its active ingredient.

Q: What is the typical starting usage for Orthobid?

A: Official regulatory documents list the standard systemic adult usage as a 100 mg dose taken twice a day (b.i.d.). This is the dose and frequency described in the prescribing information for the approved indications.

How should Orthobid be stored and disposed of?

How to Store and Dispose of Orthobid (Nimesulide)

The storage and disposal of Orthobid must strictly follow the requirements specified in the regulatory labeling to maintain product integrity and ensure environmental safety.

Storage Requirements

Condition Official Requirement
Temperature Store the product below 25 C, protected from excessive heat.
Protection Keep in a dry place, away from direct sunlight and moisture.
Container Store in the tightly closed original container or blister pack.
Child Safety The medicine must be kept out of the sight and reach of children and stored locked up (P405) in accordance with safety classifications.

Disposal Instructions

Expired or unused Orthobid must be disposed of according to official regulatory mandates. The medicine must not be released into the environment or discharged into drains or water courses. Disposal must be completed by sending the product to an approved waste disposal plant (P501), following all local, regional, and national regulations for pharmaceutical waste.

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

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