Acemetacin

Last updated
Acemetacin
Acemetacin.svg
Clinical data
Trade names Emflex, many others
AHFS/Drugs.com International Drug Names
Routes of
administration
Oral
ATC code
Legal status
Legal status
  • UK: POM (Prescription only)
Pharmacokinetic data
Bioavailability ~100%
Protein binding 80–90%
Metabolism Hydrolysis, glucuronidation
Elimination half-life 4.5±2.8 (up to 16) hrs
Excretion 40% renal, 50% biliary
Identifiers
  • 2-[2-[1-(4-Chlorobenzoyl)-5-methoxy-2-methylindol-3-yl]acetyl]oxyacetic acid
CAS Number
PubChem CID
ChemSpider
UNII
KEGG
ChEBI
ChEMBL
CompTox Dashboard (EPA)
ECHA InfoCard 100.053.077 OOjs UI icon edit-ltr-progressive.svg
Chemical and physical data
Formula C21H18ClNO6
Molar mass 415.83 g·mol−1
3D model (JSmol)
Melting point 150 to 153 °C (302 to 307 °F)
  • Clc1ccc(cc1)C(=O)n3c2ccc(OC)cc2c(c3C)CC(=O)OCC(=O)O
  • InChI=1S/C21H18ClNO6/c1-12-16(10-20(26)29-11-19(24)25)17-9-15(28-2)7-8-18(17)23(12)21(27)13-3-5-14(22)6-4-13/h3-9H,10-11H2,1-2H3,(H,24,25) Yes check.svgY
  • Key:FSQKKOOTNAMONP-UHFFFAOYSA-N Yes check.svgY
 X mark.svgNYes check.svgY  (what is this?)    (verify)

Acemetacin is a non-steroidal anti-inflammatory drug (NSAID) used for the treatment of osteoarthritis, rheumatoid arthritis, lower back pain, and relieving post-operative pain. It is manufactured by Merck KGaA under the tradename Emflex. It is no longer available in the UK (since 2018), [1] however is available in other countries as a prescription-only drug. [2]

Contents

Medical uses

Acemetacin has proven effective in the treatment of osteoarthritis, rheumatoid arthritis, ankylosing spondylitis, and other kinds of rheumatoid inflammation, as well as in post-operative and post-traumatic pain and attack of gout. [3] [4] Application of a single dose of acemetacin for post-operative pain is not well supported by studies. [5]

Contraindications

Contraindications are basically the same as with other NSAIDs: hypersensitivity reactions to NSAIDs in the past (typically asthma or skin reactions), gastrointestinal or cerebral bleeding, peptic ulcer, haematopoietic disorders (anaemia, leukopenia), and during the third trimester of pregnancy. [3] [6]

Adverse effects

Common side effects (in about 1–10% of patients) include gastrointestinal problems typical of NSAIDs, such as nausea, diarrhoea, stomach pain, and peptic ulcer; central nervous effects like headache and dizziness; and skin reactions. Gastrointestinal tolerability is better than that of the related drug indometacin. Severe allergic reactions and haematopoietic disorders occur in fewer than 0.01% of patients. [3] [4]

Interactions

The following interactions, typical of NSAIDs, have been described: [3] [4]

Pharmacology

Acemetacin acts as an inhibitor of cyclooxygenase (COX), producing the anti-inflammatory and analgetic (pain relieving) effects. In the body, it is partly metabolized to indomethacin, which also acts as a COX inhibitor. The same mechanism is responsible for the antipyretic and antiplatelet effects, which are however not clinically used, as well as for the typical NSAID adverse effects. [3] [4]

An advantage of acemetacin is that it reduces gastric damage as compared to indometacin, possibly because acemetacin has less effect on the increase of leukotriene B4 synthesis and tumor necrosis factor (TNF) expression, leading to less induction of leukocyte-endothelial adherence. [7] [8]

Pharmacokinetics

Metabolism of acemetacin. Cleaving of the glycolic acid ester (green) activates the substance to indometacin, cleaving of the methoxy ether or the 4-chlorobenzoate (orange) inactivate it. Acemetacin metabolism.svg
Metabolism of acemetacin. Cleaving of the glycolic acid ester (green) activates the substance to indometacin, cleaving of the methoxy ether or the 4-chlorobenzoate (orange) inactivate it.

The substance is quickly and almost completely absorbed from the gut. Highest blood plasma concentrations are reached after two hours. It is bound to plasma proteins to 80–90%. Concentrations in the synovial fluid and membranes, muscle and bone are higher than in the blood. [3]

Apart from the active metabolite indometacin, a number of inactive metabolites are found after application of acemetacin: the O-desmethyl-, des-4-chlorobenzoyl-, and O-desmethyl-des-4-chlorobenzoyl derivatives of both indometacin and acemetacin, as well as all of these substances' glucuronides (mediated at least partly by the enzyme UGT2B7 [9] ). Elimination half-life is 4.5±2.8 hours (in some individuals up to 16 hours) under steady state conditions. 40% are eliminated via the kidney, and 50% via the faeces. [3] [4]

Chemistry

Acemetacin is the glycolic acid ester of indometacin. It is a fine, slightly yellowish, crystalline powder that melts at 150 to 153 °C (302 to 307 °F). It is polymorphic, with four known anhydrous (water-free) and two monohydrate crystalline forms. [4]

Society and culture

Brand names

Other brand names include Zadex (Hungary), Rheutrop (Austria), Acemetadoc, Acephlogont, Azeat, Rantudil (Germany, Hungary, Mexico, Poland, Portugal, Turkey), Gamespir (Greece), Oldan, Reudol (Spain), Tilur (Switzerland), ACEO (Taiwan), Ost-map (Egypt).

Related Research Articles

<span class="mw-page-title-main">Nonsteroidal anti-inflammatory drug</span> Class of therapeutic drug for relieving pain and inflammation

Non-steroidal anti-inflammatory drugs (NSAID) are members of a therapeutic drug class which reduces pain, decreases inflammation, decreases fever, and prevents blood clots. Side effects depend on the specific drug, its dose and duration of use, but largely include an increased risk of gastrointestinal ulcers and bleeds, heart attack, and kidney disease.

<span class="mw-page-title-main">Peptic ulcer disease</span> Ulcer of an area of the gastrointestinal tract

Peptic ulcer disease is a break in the inner lining of the stomach, the first part of the small intestine, or sometimes the lower esophagus. An ulcer in the stomach is called a gastric ulcer, while one in the first part of the intestines is a duodenal ulcer. The most common symptoms of a duodenal ulcer are waking at night with upper abdominal pain, and upper abdominal pain that improves with eating. With a gastric ulcer, the pain may worsen with eating. The pain is often described as a burning or dull ache. Other symptoms include belching, vomiting, weight loss, or poor appetite. About a third of older people with peptic ulcers have no symptoms. Complications may include bleeding, perforation, and blockage of the stomach. Bleeding occurs in as many as 15% of cases.

<span class="mw-page-title-main">Naproxen</span> Nonsteroidal anti-inflammatory drug (NSAID) used to treat pain

Naproxen, sold under the brand name Aleve among others, is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain, menstrual cramps, and inflammatory diseases such as rheumatoid arthritis, gout and fever. It is taken orally. It is available in immediate and delayed release formulations. Onset of effects is within an hour and lasts for up to twelve hours.

Coffee ground vomitus refers to a particular appearance of vomit. Within organic heme molecules of red blood cells is the element iron, which oxidizes following exposure to gastric acid. This reaction causes the vomitus to look like ground coffee.

<span class="mw-page-title-main">Celecoxib</span> Nonsteroidal anti-inflammatory medication

Celecoxib, sold under the brand name Celebrex among others, is a COX-2 inhibitor and nonsteroidal anti-inflammatory drug (NSAID). It is used to treat the pain and inflammation in osteoarthritis, acute pain in adults, rheumatoid arthritis, psoriatic arthritis, ankylosing spondylitis, painful menstruation, and juvenile rheumatoid arthritis. It may also be used to decrease the risk of colorectal adenomas in people with familial adenomatous polyposis. It is taken by mouth. Benefits are typically seen within an hour.

<span class="mw-page-title-main">Phenylbutazone</span> Nonsteroidal anti-inflammatory drug (NSAID)

Phenylbutazone, often referred to as "bute", is a nonsteroidal anti-inflammatory drug (NSAID) for the short-term treatment of pain and fever in animals.

Cyclooxygenase-2 inhibitors, also known as coxibs, are a type of nonsteroidal anti-inflammatory drug (NSAID) that directly target cyclooxygenase-2 (COX-2), an enzyme responsible for inflammation and pain. Targeting selectivity for COX-2 reduces the risk of peptic ulceration and is the main feature of celecoxib, rofecoxib, and other members of this drug class.

<span class="mw-page-title-main">Indometacin</span> Anti-inflammatory drug

Indometacin, also known as indomethacin, is a nonsteroidal anti-inflammatory drug (NSAID) commonly used as a prescription medication to reduce fever, pain, stiffness, and swelling from inflammation. It works by inhibiting the production of prostaglandins, endogenous signaling molecules known to cause these symptoms. It does this by inhibiting cyclooxygenase, an enzyme that catalyzes the production of prostaglandins.

<span class="mw-page-title-main">Mefenamic acid</span> Chemical compound

Mefenamic acid is a member of the anthranilic acid derivatives class of nonsteroidal anti-inflammatory drugs (NSAIDs), and is used to treat mild to moderate pain.

<span class="mw-page-title-main">Etoricoxib</span> COX-2 selective NSAID medication

Etoricoxib, sold under the brand name Arcoxia, is a selective COX-2 inhibitor developed and commercialized by Merck. It is approved in 63 countries worldwide as of 2007, except the United States where the Food and Drug Administration sent a Non Approvable Letter to Merck and required them to provide additional data.

<span class="mw-page-title-main">Meloxicam</span> Nonsteroidal anti-inflammatory drug (NSAID)

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 used by mouth or by injection into a vein. It is recommended that it be used for as short a period as possible and at a low dose.

<span class="mw-page-title-main">Etodolac</span> Nonsteroidal anti-inflammatory drug

Etodolac is a nonsteroidal anti-inflammatory drug (NSAID).

<span class="mw-page-title-main">Amtolmetin guacil</span> Chemical compound

Amtolmetin guacil is a non-steroidal anti-inflammatory drug (NSAID). It is a prodrug of tolmetin sodium.

<span class="mw-page-title-main">Tolmetin</span> NSAID analgesic medication

Tolmetin is a nonsteroidal anti-inflammatory drug (NSAID) of the heterocyclic acetic acid derivative class.

Benoxaprofen, also known as Benoxaphen, is a chemical compound with the formula C16H12ClNO3. It is a non-steroidal anti-inflammatory drug (NSAID) of the propionic acid class, and was marketed under the brand name Opren in the United Kingdom and Europe by Eli Lilly and Company (commonly referred to as Lilly), and as Oraflex in the United States of America (USA). Lilly suspended sales of Oraflex in 1982 after reports from the British government and the United States Food and Drug Administration (US FDA) of adverse effects and deaths linked to the drug.

<span class="mw-page-title-main">Lornoxicam</span> NSAID analgesic medication

Lornoxicam, also known as chlortenoxicam, is a nonsteroidal anti-inflammatory drug (NSAID) of the oxicam class with analgesic, anti-inflammatory and antipyretic properties. It is available in oral and parenteral formulations.

<span class="mw-page-title-main">Mofezolac</span> Chemical compound

Mofezolac (INN), sold under the name Disopain in Japan, is a nonsteroidal anti-inflammatory drug (NSAID) used for its analgesic and anti-inflammatory actions. It is often prescribed for rheumatoid arthritis, lower back pain, frozen shoulder, and pain management after surgery or trauma. It is also being investigated for potential use in the treatment of neuroinflammation.

<span class="mw-page-title-main">Troxipide</span> Chemical compound

Troxipide is a drug used in the treatment of gastroesophageal reflux disease. Troxipide is a systemic non-antisecretory gastric cytoprotective agent with anti-ulcer, anti-inflammatory and mucus secreting properties irrespective of pH of stomach or duodenum. Troxipide is currently marketed in Japan (Aplace), China (Shuqi), South Korea (Defensa), and India (Troxip). It is used for the management of gastric ulcers, and amelioration of gastric mucosal lesions in acute gastritis and acute exacerbation of chronic gastritis.

Prostaglandin inhibitors are drugs that inhibit the synthesis of prostaglandin in human body. There are various types of prostaglandins responsible for different physiological reactions such as maintaining the blood flow in stomach and kidney, regulating the contraction of involuntary muscles and blood vessels, and act as a mediator of inflammation and pain. Cyclooxygenase (COX) and Phospholipase A2 are the major enzymes involved in prostaglandin production, and they are the drug targets for prostaglandin inhibitors. There are mainly 2 classes of prostaglandin inhibitors, namely non- steroidal anti- inflammatory drugs (NSAIDs) and glucocorticoids. In the following sections, the medical uses, side effects, contraindications, toxicity and the pharmacology of these prostaglandin inhibitors will be discussed.

<span class="mw-page-title-main">Antiarthritics</span> Drug class

An antiarthritic is any drug used to relieve or prevent arthritic symptoms, such as joint pain or joint stiffness. Depending on the antiarthritic drug class, it is used for managing pain, reducing inflammation or acting as an immunosuppressant. These drugs are typically given orally, topically or through administration by injection. The choice of antiarthritic medication is often determined by the nature of arthritis, the severity of symptoms as well as other factors, such as the tolerability of side effects.

References

  1. "Acemetacin capsules for pain and inflammation - Emflex". 29 March 2023.
  2. International Drug Names : Acemetacin.
  3. 1 2 3 4 5 6 7 Haberfeld H, ed. (2015). Austria-Codex (in German). Vienna: Österreichischer Apothekerverlag.
  4. 1 2 3 4 5 6 Dinnendahl V, Fricke U, eds. (2003). Arzneistoff-Profile (in German). Vol. 1 (18 ed.). Eschborn, Germany: Govi Pharmazeutischer Verlag. ISBN   978-3-7741-9846-3.
  5. Moore RA, Derry S, McQuay HJ (July 2009). "Single dose oral acemetacin for acute postoperative pain in adults". The Cochrane Database of Systematic Reviews. 2019 (3): CD007589. doi:10.1002/14651858.CD007589.pub2. PMC   4170991 . PMID   19588437.
  6. UK Drug Information on Emflex.
  7. Chávez-Piña AE, McKnight W, Dicay M, Castañeda-Hernández G, Wallace JL (November 2007). "Mechanisms underlying the anti-inflammatory activity and gastric safety of acemetacin". British Journal of Pharmacology. 152 (6): 930–8. doi:10.1038/sj.bjp.0707451. PMC   2078220 . PMID   17876306.
  8. Chávez-Piña AE, Vong L, McKnight W, Dicay M, Zanardo RC, Ortiz MI, et al. (November 2008). "Lack of effects of acemetacin on signalling pathways for leukocyte adherence may explain its gastrointestinal safety". British Journal of Pharmacology. 155 (6): 857–64. doi:10.1038/bjp.2008.316. PMC   2597236 . PMID   18695646.
  9. "Acemetacin" . MediQ.ch. Retrieved 16 September 2016.