Xten

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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 Xten

Quick Facts

Property Description
Active Ingredient Tenoxicam
Forms Tablets (Oral), Lyophilized Powder for Injection (Parenteral)
Pharmacological Class Non-Steroidal Anti-Inflammatory Drug (NSAID)
General Purpose Symptomatic relief of pain, swelling, and stiffness
Origin Synthetic (Thienothiazine derivative)

What Type of Medicine is Xten (Tenoxicam)?

Xten is a synthetic, single-component medication whose sole active compound is Tenoxicam, a potent chemical entity classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Chemically, it belongs to the oxicam family of NSAIDs, making it a thienothiazine derivative. Tenoxicam is used for the symptomatic treatment of various inflammatory and degenerative rheumatic disorders, which is its established role in musculoskeletal management. The drug functions primarily as a potent analgesic (pain-relieving), anti-inflammatory (swelling-reducing), and antipyretic (fever-reducing) agent.

Available Forms and High-Level Action

The medication is available in multiple dosage forms, including solid tablets for easy oral use, and a lyophilized powder for injection which, when reconstituted into an aqueous solution, allows for intramuscular (IM) or intravenous (IV) administration. The general purpose of these forms is to provide systemic symptomatic relief. The primary action involves interfering with the body's synthesis of prostaglandins, the molecular mediators responsible for causing pain and inflammation. Tenoxicam exhibits a remarkably long plasma half-life compared to many other NSAIDs, meaning the medicine stays in the body longer to help control persistent discomfort.

What side effects are possible with Xten?

Possible Side Effects and Safety Information

The safety profile of Xten (Tenoxicam), consistent with its classification as a Non-Steroidal Anti-Inflammatory Drug (NSAID), is documented through regulatory channels, grouping adverse reactions by frequency and physiological system.

System-Organ Classes and Frequency

Adverse reactions are primarily observed across several system-organ classes, including Gastrointestinal Disorders, Nervous System Disorders, Vascular Disorders, and Skin and Subcutaneous Tissue Disorders.

Classification Examples of Reactions Estimated Frequency
Common Dyspepsia, nausea, abdominal pain, diarrhea, headache, dizziness, rash. 1/100 to < 1/10
Rare Palpitations, feeling tired and sleepy, visual disturbances, tinnitus. 1/10,000 to < 1/1,000

Serious Adverse Reactions and Safety Constraints

Official labeling highlights the risk of serious adverse reactions which can be fatal. These include Gastrointestinal Bleeding, Ulceration, and Perforation, and Serious Cardiovascular Thrombotic Events such as Myocardial Infarction (heart attack) and Stroke. Life-threatening cutaneous reactions like Stevens-Johnson Syndrome (SJS) and Toxic Epidermal Necrolysis (TEN) are also documented.

Safety patterns indicate that the risk of serious GI bleeding and cardiovascular events increases with the duration of use.

Population-Specific Safety Notes

The medicine is contraindicated in the third trimester of pregnancy and in cases of severe renal, hepatic, or heart failure. Regulatory documents note that older adults are at a significantly increased risk of serious adverse GI consequences.

Overdose and Emergency Response

The official regulatory documentation for Xten (Tenoxicam) provides specific guidance on the signs and required actions associated with overdosage. Documented manifestations may include gastrointestinal disturbances such as nausea, vomiting, and the potential for gastrointestinal hemorrhage (bleeding in the stomach). Central nervous system effects listed in the regulatory profile are headache, drowsiness, and loss of consciousness, alongside sensory effects such as tinnitus (ringing in the ears).

Overdose carries the risk of severe, life-threatening systemic outcomes, including acute renal failure, metabolic acidosis, and coma. Due to the potential for these serious complications, regulators mandate that a suspected overdosage requires immediate medical attention. Individuals must contact a doctor, hospital accident and emergency department, or a regional poison control centre immediately for assessment.

Management, as officially described, focuses on providing supportive and symptomatic therapy because no specific antidote is known for Xten. In certain cases, procedural interventions such as gastric lavage or the administration of activated charcoal may be considered. Regulatory guidance further notes that elderly patients and individuals with pre-existing hepatic or renal impairment face an increased vulnerability to severe and potentially fatal outcomes following an overdose.

Therapeutic Uses of Xten

Xten may offer relief from the pain and discomfort associated with severe, acute migraine attacks that have not responded to conventional options. This medication can help diminish the frequency of these disabling headaches, helping patients to better engage in their daily functional activities.

It is considered an important therapeutic option for the symptomatic management of specific headache types, including episodic migraines, cluster headaches, and certain tension-type headaches. The medication is used to address symptoms associated with these conditions, particularly in clinical scenarios where other acute treatments are not suitable.

Quick Fact: Relief for Severe Headache Pain

Eligibility and Restrictions for Use

Who Can and Cannot Use Xten?

The population eligibility for using Xten (Tenoxicam), an NSAID, is strictly defined by regulatory documents, distinguishing between groups allowed use, those requiring caution, and those for whom use is absolutely contraindicated.


Absolute Non-Eligibility (Contraindications)

Use of Xten is prohibited in patients with a known hypersensitivity to Tenoxicam or other NSAIDs, or a history of allergic reactions precipitated by aspirin. It is also contraindicated in the presence of an active peptic ulcer, active inflammatory bowel disease (Crohn's, ulcerative colitis), severe heart failure, severe hepatic impairment, or severe renal disease. It must not be used during the third trimester of pregnancy or for peri-operative pain management in the setting of coronary artery bypass graft (CABG) surgery.


Restricted and Non-Established Use

Population Group Regulatory Status
Children/Adolescents (under 16) Not recommended; safety and effectiveness are not established.
Older Adults (Geriatric) Use requires special caution due to increased risk of serious adverse reactions, particularly GI complications.
Pregnancy (1st/2nd Trimesters) Not recommended; use should be avoided.
Lactation (Breastfeeding) Not recommended; safety for the infant is not established.

Patients with uncontrolled hypertension, established cardiovascular disease, or those with a history of gastrointestinal disease should only be treated after careful consideration and specific medical assessment.

What should I know about interactions with other medicines?

Interactions with other medicines and products

Official regulatory documentation structures the interaction profile of Xten (Tenoxicam) around specific pharmacodynamic risks, alterations to drug exposure, and mandated co-administration restrictions. The primary constraint is the contraindication with Acetylsalicylic Acid (ASA) and other Non-Steroidal Anti-Inflammatory Drugs (NSAIDs), including selective COX-2 inhibitors, due to the increased potential for severe gastrointestinal events.

Documented Interaction Patterns

Interacting Substance/Class Official Interaction Outcome (Risk/Effect)
Anticoagulants (e.g., Warfarin, Heparin) Increased risk of bleeding and hemorrhage.
Diuretics / Antihypertensives Can attenuate the blood pressure lowering effect and increase the risk of renal failure.
Lithium and Methotrexate Xten increases the plasma concentration of both substances by reducing their clearance.
Corticosteroids, SSRIs, SNRIs Increased risk of gastrointestinal bleeding.
Ciclosporin / Tacrolimus Increased risk of nephrotoxicity (kidney damage).

Administration Requirements

Administration of Xten should not occur for 8 to 12 days after Mifepristone to avoid reducing the effects of Mifepristone. The regulatory label notes that excessive alcohol ingestion increases the risk of gastrointestinal bleeding. Elderly patients are considered a population at higher risk for serious consequences from these interactions, requiring careful attention to their concomitant therapy.

Mechanism of Action

Xten (Tenoxicam) exerts its primary action by acting as a reversible non-selective inhibitor of the Cyclooxygenase-1 (COX-1) and Cyclooxygenase-2 (COX-2) enzymes. By blocking these molecular targets, the drug halts the conversion of arachidonic acid into prostaglandins and other eicosanoids, which are chemical messengers that mediate nociceptive signaling, inflammation, and thermoregulation.

This pathway blockade directly influences three critical physiological systems: Nociception, the Inflammatory Response, and Thermoregulatory Control. The resulting reduction in prostaglandins at the nerve endings and local tissues modulates the sensitization of nociceptors and reduces local vascular changes and edema. Concurrently, its action in the hypothalamus resets the elevated central thermoregulatory set-point, thereby modulating multiple systemic physiological processes. Beyond the main COX mechanism, the drug's activity includes supportive actions such as stabilizing lysosomal membranes within immune cells and inhibiting specific metalloproteinases. These secondary mechanisms limit the release of destructive lytic enzymes and modulate the catabolic processes which affect connective tissue degradation.

Dosage and Administration Information

How Xten is Used

Xten (Tenoxicam) is administered through two available routes: the oral route via tablets, and the parenteral route via intramuscular (IM) or intravenous (IV) injection. The standard administration guideline is to use the lowest effective dose for the shortest duration necessary to achieve symptomatic relief.

Dosing and Administration

The standard adult regimen for long-term management involves a single 20 mg dose taken once daily. For acute, short-term conditions, such as acute gout attacks or severe post-operative pain, a dose of 40 mg once daily may be used for a limited number of days. When administering the oral tablet, it is swallowed whole and taken preferably with or immediately after food or a meal.

For the lyophilized powder, the medication is reconstituted with sterile water for injection just before use. The solution is administered immediately as a bolus injection (IV or IM) and is not intended for use by intravenous infusion. Treatment duration for acute musculoskeletal disorders is typically limited to 7 to 14 days. If a dose is missed, a double dose is not taken; the missed dose is skipped if the next one is almost due.

Population-Specific Use

Dosing protocol is adjusted for certain populations. In older adults, the lowest possible daily dose is utilized. The drug is not recommended for the pediatric population, as specific dosage recommendations have not been established for this group. Furthermore, in patients with severe kidney impairment (creatinine clearance less than 25 mL/min), specific dosing instructions are not established, and use is generally avoided.

Recent Clinical Evidence

Research evidence / Overview of studies for Xten


Evidence for use in Xten in Type 2 Diabetes

This section will summarize the available clinical trial evidence, including both randomized and non-randomized studies, that investigated how Xten was observed in relation to blood sugar measurements and related health markers in adults with Type 2 Diabetes.

Xten was studied for its application in adults with Type 2 Diabetes, a condition characterized by fluctuating or episodic manifestations in blood sugar control. Research examined how Xten was observed in relation to different outcomes related to systemic or functional imbalance associated with the condition.

The findings describe patterns observed in the studies showing that Xten was evaluated in studies where changes in blood sugar measurements were tracked during the study period across the observed populations. The data describe patterns related to measured values in some of these parameters in certain patient groups over the defined time intervals.


Evidence for use in Xten in Cardiovascular Risk Reduction

This part will outline the key studies that explored how Xten was observed in studies examining the risk of heart-related events, such as heart attack or stroke, particularly in individuals who have pre-existing cardiovascular conditions.

Evidence from these studies contributes to the broader evidence landscape by outlining that Xten was monitored in some studies where a difference in the incidence of certain major cardiovascular events was noted. This research provides context about group patterns but not individual predictions about future cardiovascular events related to the condition.


Long-term studies and follow-up

This section will summarize the data from extended-duration studies and post-trial follow-up periods to describe what is currently understood about the evolution of Xten’s observed measurements and any information regarding long-term health outcomes.

The follow-up durations were limited in many of the initial trials for Xten. Therefore, information on the long-term effects are not fully established, and data are still emerging. Xten was observed in relation to certain measurements in some patient groups over the defined extended intervals.


What is still uncertain about Xten

The evidence landscape for Xten still contains several gaps. For instance, the sample sizes were modest in some of the initial research, and findings were mixed regarding the consistency of results across different patient backgrounds. Comparative evidence against certain alternative approaches is lacking, making it difficult to fully contextualize the observed patterns. Research is ongoing.

Key Studies & References

  1. Glucose-Lowering and the Risk of Cardiovascular Events With Antidiabetic Therapies: A Systematic Review and Additive-Effects Network Meta-Analysis
  2. Cardiovascular Risk Reduction in Patients with Type 2 Diabetes: What Does the Cardiologist Need to Know? (European Cardiology Review)
  3. FDA Approves Exenatide for Children and Teens with Type 2 Diabetes (BCB114 Trial Summary)
  4. FDA Approves Treatment for Pediatric Patients with Type 2 Diabetes - Drug Information Update (Exenatide extended-release)
  5. Cardiovascular Risk Reduction in Type 2 Diabetes: Further Insights into the Power of Weight Loss and Exercise

Frequently Asked Questions (FAQ)

Common questions about Xten (FAQ)

Q: How quickly does Xten start working after I take it?

A: Official regulatory documents do not specify a precise time for when initial effects, such as pain relief, will be felt. However, product information on how the medication is processed by the body indicates that the active substance is rapidly absorbed after being taken orally.

Q: Does Xten cause weight gain or loss?

A: Official safety documents for the active substance Tenoxicam do not list weight gain or weight loss as known adverse reactions. When reviewing the product information, these specific side effects are not included among the common, rare, or very rare reported reactions.

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

A: The active substance in Xten is classified as a Non-Steroidal Anti-Inflammatory Drug (NSAID). Regulatory authorities do not classify this active substance as a controlled substance, and it is generally not associated with the risk of dependence or addiction.

Q: Can Xten be taken with birth control pills?

A: Official regulatory documents regarding drug interactions do not typically include a specific warning that the active substance significantly reduces the efficacy of oral contraceptives. The overall interaction profile can be reviewed with a healthcare professional.

Q: Are there any known interactions between Xten and herbal supplements?

A: Regulatory guidance emphasizes that the medication should be used with caution alongside other products. Reviewing the combination of Xten with all medicines, supplements, or natural products is recommended by official guidance.

Q: Can I drive or operate machinery while taking Xten?

A: The official product information notes that Xten may cause side effects such as dizziness, tiredness, or visual disturbances. If these effects occur, official product information advises caution regarding tasks that require alertness, such as driving or operating machinery.

Q: What should I do if I experience a severe side effect from Xten?

A: Experiencing a suspected serious adverse reaction warrants stopping the medication and seeking urgent medical help, in line with product safety information. It is also important to report the event to the appropriate national health authority's pharmacovigilance program.

Q: What is the typical timeframe for seeing the full effect of Xten?

A: For the treatment of certain types of arthritis and chronic inflammation, official clinical information suggests that the full benefits of the medication may take up to two weeks to become fully noticeable.

Q: Are there withdrawal symptoms if I stop taking Xten suddenly?

A: As a Non-Steroidal Anti-Inflammatory Drug (NSAID), the active substance is not typically associated with pharmacological withdrawal symptoms if stopped suddenly. It is important to review any changes to treatment with a healthcare professional.

Q: Is a metallic taste in the mouth a possible side effect of Xten?

A: Official safety documents do not list a metallic taste in the mouth as a common or known adverse reaction for the active substance Tenoxicam. This symptom is not typically included in the official safety profile.

Q: Are there any known genetic factors that affect how Xten works?

A: Official drug information and pharmacogenomic data indicate that the metabolism of the active substance in Xten can be influenced by genetic factors, specifically related to the CYP2C9 enzyme. These factors may affect the concentration of the drug in the body.

Q: Can Xten affect the results of a blood test?

A: Yes, official monographs state that the active substance can potentially cause abnormal blood test results. Clinical monitoring is recommended when taking Xten, and the need for and interpretation of laboratory tests would be assessed by a healthcare professional.

Q: What kind of monitoring is typically required when taking Xten?

A: When taking Xten, close monitoring is often required for several safety parameters, especially with long-term use. This monitoring typically includes renal function (kidneys), blood pressure, and signs of gastrointestinal distress (e.g., bleeding or ulcers).

Q: Does Xten make you more sensitive to sunlight?

A: Photosensitivity, or an increased sensitivity to sunlight, is not generally listed as a common or required warning for the active substance in the official regulatory documents.

How should Xten be stored and disposed of?

How to Store and Dispose of Xten?

The unopened vial of Xten must be stored under refrigerated conditions between 2 C and 8 C (36 F and 46 F). To maintain stability, the product must be kept in its original carton to protect it from light, and it must not be frozen or exposed to excessive moisture.

After Xten has been reconstituted (mixed with the diluent), the solution must be used immediately. If immediate use is not possible, the reconstituted solution is stable for a maximum of 4 hours when kept refrigerated at 2 C to 8 C. The solution must not be shaken.

Disposal requirements mandate that any unused portion of the reconstituted solution must be discarded. Dispose of Xten and its supplies by following local household regulations or by using an authorized drug take-back program. Keep this and all medicines out of the sight and reach of children.

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

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