|Trade names||Mobic, Metacam, others|
|Metabolism||Liver (CYP2C9 and 3A4-mediated)|
|Elimination half-life||20 hours|
|Excretion||Urine and faeces equally|
|CompTox Dashboard (EPA)|
|Chemical and physical data|
|Molar mass||351.403 g/mol g·mol−1|
|3D model (JSmol)|
|(what is this?)|
Meloxicam, sold under the brand name Mobic among others, is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and inflammation in rheumatic diseases and osteoarthritis. It is taken by mouth. It is recommended that it be used for as short a period as possible and at a low dose.
Common side effects include abdominal pain, dizziness, swelling, headache, and a rash. Serious side effects may include heart disease, stroke, kidney problems, and stomach ulcers. Use is not recommended in the third trimester of pregnancy. It blocks cyclooxygenase-2 (COX-2) more than it blocks cyclooxygenase-1 (COX-1). It is in the oxicam family of chemicals and is closely related to piroxicam.
Meloxicam was patented in 1977 and approved for medical use in the United States in 2000. It was developed by Boehringer Ingelheim, however is also available as a generic medication. In the United States the wholesale cost per dose is less than US$0.02 as of 2018[update]. In the United Kingdom it costs about 0.13 pounds as of 2018[update]. In 2016, it was the 36th most prescribed medication in the United States with more than 21 million prescriptions.
- 1 Adverse effects
- 2 Mechanism of action
- 3 Pharmacokinetics
- 4 Specific populations
- 5 Veterinary use
- 6 References
- 7 External links
Meloxicam use can result in gastrointestinal toxicity and bleeding, headaches, rash, and very dark or black stool (a sign of intestinal bleeding). Like other NSAIDs, its use is associated with an increased risk of cardiovascular events such as heart attack and stroke. It has fewer gastrointestinal side effects than diclofenac, piroxicam, naproxen, and perhaps all other NSAIDs which are not COX-2 selective. Although meloxicam inhibits formation of thromboxane A, it does not appear to do so at levels that would interfere with platelet function.[medical citation needed]
A pooled analysis of randomized, controlled studies of meloxicam therapy of up to 60 days duration found that meloxicam was associated with a statistically significantly lower number of thromboembolic complications than the NSAID diclofenac (0.2% versus 0.8% respectively) but a similar incidence of thromboembolic events to naproxen and piroxicam.
Persons with hypertension, high cholesterol, or diabetes are at risk for cardiovascular side effects. Persons with family history of heart disease, heart attack, or stroke must tell their treating physician as the potential for serious cardiovascular side effects is significant.
NSAIDs cause and increase the risk of serious gastrointestinal adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. Elderly patients are at greater risk for serious gastrointestinal events.
It is recommended to withhold meloxicam use for at least four to six half-lives prior to surgical or dental procedures due to increased risk for taste perversion, ulcerative stomatitis and dry mouth.[medical citation needed]
Mechanism of action
Meloxicam blocks cyclooxygenase (COX), the enzyme responsible for converting arachidonic acid into prostaglandin H2—the first step in the synthesis of prostaglandins, which are mediators of inflammation. Meloxicam has been shown, especially at its low therapeutic doses, selectively to inhibit COX-2 over COX-1.
Meloxicam concentrations in synovial fluid range from 40% to 50% of those in plasma. The free fraction in synovial fluid is 2.5 times higher than in plasma, due to the lower albumin content in synovial fluid as compared to plasma. The significance of this penetration is unknown, but it may account for the fact that it performs exceptionally well in treatment of arthritis in animal models.
The bioavailability of meloxicam is decreased when administered orally compared to an equivalent IV bolus dose. Use of oral meloxicam following a high-fat breakfast increases the mean peak drug levels by about 22%, however, the manufacturer does not make any specific meal recommendations. In addition, the use of antacids does not show pharmacokinetic interactions.
Meloxicam is extensively metabolized in the liver by the enzymes CYP2C9 and CYP3A4 (minor) onto 4 inactive metabolites. Peroxidase activity is thought to be responsible for the other 2 remaining metabolites.
Meloxicam is predominantly excreted in the form of metabolites and occurs to equal extents in the urine and feces. Traces of unchanged parent drug are found in urine and feces. The mean elimination half-life ranges from 15 to 20 hours.
Use of meloxicam is not recommended in people with peptic ulcer disease or increased gastrointestinal bleed risk, including those over 75 years of age or taking medications associated with bleeding risk. Adverse events have been found to be dose-dependent and associated with length of treatment.
Side effects in animals are similar to those found in humans; the principal side effect is gastrointestinal irritation (vomiting, diarrhea, and ulceration).[medical citation needed] Rarer but important side effects include liver and kidney toxicity.[medical citation needed]
In healthy dogs given meloxicam, no perioperative adverse effects on the cardiovascular system have been reported at recommended dosages. Perioperative administration of meloxicam to cats did not affect postoperative respiratory rate nor heart rate.
A peer-reviewed journal article cites NSAIDs, including meloxicam, as causing gastrointestinal upset and, at high doses, acute renal failure and CNS signs such as seizures and comas in cats. It adds that cats have a low tolerance for NSAIDs.
In dogs, the absorption of meloxicam from the stomach is not affected by the presence of food, with the peak concentration (Cmax) of meloxicam occurring in the blood 7–8 hours after administration. The half-life of meloxicam is approximately 24 hours in dogs.
In 2003, meloxicam was approved in the U.S. for use in dogs for the management of pain and inflammation associated with osteoarthritis, as an oral (liquid) formulation of meloxicam. In January 2005, the product insert added a warning in bold-face type: "Do not use in cats." An injectable formulation for use in dogs was approved by the Food and Drug Administration (FDA) in November 2003.
In October 2004, a formulation for use in cats was approved for use prior to surgery only. This is an injectable meloxicam, indicated for as a single, one-time dose only, with specific and repeated warnings not to administer a second dose.
In Europe, where the product has been available since the early 1990s, it is licensed for other anti-inflammatory benefits including relief from both acute and chronic pain in dogs. In June 2007, an oral version of meloxicam was licensed for the long-term relief of pain in cats. Meloxicam is also licensed for use in horses, to relieve the pain associated with musculoskeletal disorders.
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- Noble S, Balfour JA (March 1996). "Meloxicam". Drugs. 51 (3): 424–30, discussion 431–32. doi:10.2165/00003495-199651030-00007. PMID 8882380.
- British national formulary : BNF 76 (76 ed.). Pharmaceutical Press. 2018. pp. 1112–1113. ISBN 9780857113382.
- "Meloxicam Monograph for Professionals". Drugs.com. AHFS. Retrieved 23 December 2018.
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- Hawkey C, Kahan A, Steinbrück K, Alegre C, Baumelou E, Bégaud B, et al. (September 1998). "Gastrointestinal tolerability of meloxicam compared to diclofenac in osteoarthritis patients. International MELISSA Study Group. Meloxicam Large-scale International Study Safety Assessment". British Journal of Rheumatology. 37 (9): 937–45. doi:10.1093/rheumatology/37.9.937. PMID 9783757.
- Dequeker J, Hawkey C, Kahan A, Steinbrück K, Alegre C, Baumelou E, et al. (September 1998). "Improvement in gastrointestinal tolerability of the selective cyclooxygenase (COX)-2 inhibitor, meloxicam, compared with piroxicam: results of the Safety and Efficacy Large-scale Evaluation of COX-inhibiting Therapies (SELECT) trial in osteoarthritis". British Journal of Rheumatology. 37 (9): 946–51. doi:10.1093/rheumatology/37.9.946. PMID 9783758.
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- By the 2019 American Geriatrics Society Beers Criteria® Update Expert Panel (April 2019). "American Geriatrics Society 2019 Updated AGS Beers Criteria® for Potentially Inappropriate Medication Use in Older Adults". Journal of the American Geriatrics Society. 67 (4): 674–694. doi:10.1111/jgs.15767. PMID 30693946.
- Off-label use discussed in: Arnold Plotnick MS, DVM, ACVIM, ABVP, Pain Management using Metacam Archived 2011-07-14 at the Wayback Machine, and Stein, Robert, Perioperative Pain Management Part IV, Looking Beyond Butorphanol, Sep 2006, Veterinary Anesthesia & Analgesia Support Group.
- For off-label use example in rabbits, see Krempels, Dana, Hind Limb Paresis and Paralysis in Rabbits, University of Miami Biology Department.
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- Höglund OV, Dyall B, Gräsman V, Edner A, Olsson U, Höglund K (October 2018). "Effect of non-steroidal anti-inflammatory drugs on postoperative respiratory and heart rate in cats subjected to ovariohysterectomy". Journal of Feline Medicine and Surgery. 20 (10): 980–984. doi:10.1177/1098612X17742290. PMID 29165006.
- "Toxicology Brief: The 10 most common toxicoses in cats". Dvm360. 1 June 2006. Retrieved 16 September 2018.
- Merola V, Dunayer E (June 2006). "The 10 most common toxicoses in cats" (PDF). Veterinary Medicine: 340–342.
- Removing the Threat of Diclofenac to Critically Endangered Asian Vultures, by Swan, Naidoo, Cuthbert, et al.; in PLoS Biology 2006 Mar; 4(3): e66. doi: 10.1371/journal.pbio.0040066
- Khan SA, McLean MK (March 2012). "Toxicology of frequently encountered nonsteroidal anti-inflammatory drugs in dogs and cats". The Veterinary Clinics of North America. Small Animal Practice. 42 (2): 289–306, vi–vii. doi:10.1016/j.cvsm.2012.01.003. PMID 22381180.
- Kimble B, Black LA, Li KM, Valtchev P, Gilchrist S, Gillett A, et al. (October 2013). "Pharmacokinetics of meloxicam in koalas (Phascolarctos cinereus) after intravenous, subcutaneous and oral administration". Journal of Veterinary Pharmacology and Therapeutics. 36 (5): 486–93. doi:10.1111/jvp.12038. PMID 23406022.
- "NADA 141-213: New Animal Drug Application Approval (for Metacam (meloxicam) 0.5 mg/mL and 1.5 mg/mL Oral Suspension)" (PDF). Food and Drug Administration (FDA). 15 April 2003. Archived from the original (PDF) on 6 April 2017. Retrieved 24 July 2010.
- "Client Information Sheet For Metacam (meloxicam) 1.5 mg/mL Oral Suspension" (PDF). Food and Drug Administration (FDA). January 2005. Archived from the original (PDF) on 15 November 2017.
Metacam is a prescription non-steroidal anti-inflammatory drug (NSAID) that is used to control pain and inflammation (soreness) due to osteoarthritis in dogs. Osteoarthritis (OA) is a painful condition caused by “wear and tear” of cartilage and other parts of the joints that may result in the following changes or signs in your dog: Limping or lameness, decreased activity or exercise (reluctance to stand, climb stairs, jump or run, or difficulty in performing these activities), stiffness or decreased movement of joints. Metacam is given to dogs by mouth. Do not use Metacam Oral Suspension in cats. Acute renal failure and death have been associated with the use of meloxicam in cats.
- "NADA 141-219: Metacam (meloxicam) 5 mg/mL Solution for Injection" (PDF). Food and Drug Administration (FDA). 12 November 2003. Archived from the original (PDF) on 15 November 2017. Retrieved 8 August 2019.
- "Metacam 5 mg/mL Solution for Injection, Supplemental Approval" (PDF). Food and Drug Administration (FDA). 28 October 2004. Archived from the original (PDF) on 15 November 2017. Retrieved 8 August 2019.
- See the manufacturer's FAQ on its website, and its clinical dosing instructions for cats. Archived 2008-09-06 at the Wayback Machine
- "Notice of Violation" (PDF). Food and Drug Administration (FDA). 19 April 2005. Archived from the original (PDF) on 13 January 2017. Retrieved 8 August 2019.
- Maddison JE, Page SW, Church D, eds. (2008). "Meloxicam". Small animal clinical pharmacology (2nd ed.). Edinburgh: Saunders/Elsevier. pp. 301–302. ISBN 9780702028588.