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Instructions

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Instruction for use: Mefenamic acid (Acidum Mefenamicum)

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Pharmacological group

NSAIDs – Fenamates

Nosological classification (ICD-10)

I00-I02 Acute rheumatic fever

I40 Acute myocarditis

J11 Influenza, virus not identified

Flu, Influenza in the early stages of the disease, Flu in children, cold in the chest, Begins flu-like condition, Acute disease parainfluenza, parainfluenza, parainfluenza state, influenza epidemics, The pains of the flu, Influenza

K05.2 Acute periodontitis

Periodontal disease, Periodontitis, Periodontitis acute, Periodontal disease complicated by gingivitis, Pericoronite

M06.9 Other specified rheumatoid arthritis

Rheumatoid arthritis,Pain syndrome in rheumatic diseases, Pain in rheumatoid arthritis, Inflammation in rheumatoid arthritis, Degenerative forms of rheumatoid arthritis, Children's rheumatoid arthritis, Exacerbation of rheumatoid arthritis, Acute articular rheumatism, Rheumatic arthritis, Rheumatic polyarthritis, Rheumatoid arthritis, Rheumatic polyarthritis, Rheumatoid arthritis, Rheumatoid arthritis of active course, Rheumatoid arthritis, Rheumatoid polyarthritis, Acute rheumatoid arthritis, Acute rheumatism

M25.5 Pain in the joint

Arthralgia, Pain syndrome in musculo-articular diseases, Pain syndrome in osteoarthritis, Pain syndrome in osteoarthritis, Pain syndrome in acute inflammatory diseases of the musculoskeletal system, Pain syndrome in chronic inflammatory diseases of the musculoskeletal system, Pain in the joints, Soreness of the joints, Soreness of joints in severe physical exertion, Painful inflammatory joint damage, Painful conditions of the musculoskeletal system, Painful joint conditions, Painful traumatic affection of joints, Pain in the musculoskeletal system, Pain in Shoulder Joints, Pain in the joints, Joint pain, Joint pain with injuries, Musculoskeletal pain, Pain with osteoarthritis, Pain in the pathology of the joints, Pain in rheumatoid arthritis, Pain in chronic degenerative bone diseases, Pain in chronic degenerative joint diseases, Bone-joint pain, Joint pain, Arthritic pain of rheumatic origin, Articular pain syndrome, Joint pain, Rheumatic pain, Rheumatic pains

M45 Ankylosing spondylitis

Ankylosing spondylarthrosis, Marie-Strumpel disease, Ankylosing spondylitis, Pain syndrome in acute inflammatory diseases of the musculoskeletal system, Pain syndrome in chronic inflammatory diseases of the musculoskeletal system, Bechterew's disease, Ankylosing spondylitis, Diseases of the spinal column, Rheumatic spondylitis, Bechterew-Marie-Strumpel disease

M79.1 Myalgia

Myofascial pain syndromes ,Pain syndrome in musculo-articular diseases, Pain syndrome in chronic inflammatory diseases of the musculoskeletal system, Pain in the muscles, Tenderness of muscles, Muscular soreness in severe physical exertion, Painful conditions of the musculoskeletal system, Pain in the musculoskeletal system, Pain in the muscles, Pain at rest, Muscle aches, Muscle pain, Musculoskeletal pain, Myalgia, Muscle pain, Muscle pain at rest, Muscle pain, Muscular pain of non-rheumatic origin, Muscle pain of rheumatic origin, Acute muscle pain, Rheumatic pain, Rheumatic pains, Myofascial syndrome, Fibromyalgia

M79.2 Neurology and neuritis, unspecified

Pain syndrome with neuralgia, Brachialgia, Occipital and intercostal neuralgia, Neuralgia, Neuralgic pain, Neuralgia, Neuralgia of intercostal nerves,Neuralgia of the posterior tibial nerve, Neuritis, Neuritis traumatic, Neuritis, Neurological Pain Syndromes, Neurological contractures with spasms, Acute neuritis, Peripheral neuritis,Post-traumatic neuralgia,Severe pain of a neurogenic nature, Chronic neuritis, Essential neuralgia

N94.3 Premenstrual tension syndrome

Pronounced premenstrual syndrome, Menstrual psychosomatic disorder, Menstrual syndrome, Premenstrual tension, Premenstrual status, Premenstrual period, Premenstrual syndrome, Menstruation syndrome

N94.6 Dysmenorrhea Unspecified

Pain during menstruation, Functional disorders of the menstrual cycle, Menstrual cramps, Emmeniopathy, Pain during menstruation, Painful menstrual irregularities, algomenorrhea, algomenoreya, Pain smooth muscle spasm, Pain spasm of smooth muscles (renal and biliary colic, intestinal spasms, dysmenorrhea), Pain spasm of smooth muscles of internal organs (kidney and biliary colic, intestinal spasms, dysmenorrhea), Disalgomenoreya, dysmenorrhea, Dysmenorrhea (essential) (Exfoliative), menstrual disorder, menstruation painful, metrorrhagia, Violation of the menstrual cycle, Menstrual irregularities, Prolaktinzavisimoe menstrual disorders, Prolaktinzavisimoe menstrual dysfunction, Pain spasm of smooth muscles of internal organs, Spasmodic dysmenorrhea, Primary disalgomenoreya

R50 Fever of unknown origin

Malignant hyperthermia, Hyperthermia malignant

R51 Headache

Pain in the head, Cephalgia, Pain with sinusitis, Pain in the back of the head, Painful headache, Headache of vasomotor genesis, Headache of vasomotor origin, Headache with vasomotor disorders, Headache, Neurological headache, Serial headache

R52.2 Other constant pain

Pain syndrome, rheumatic origin, Pain at vertebral lesions, Pain in the chamber, Pain for burns, Pain syndrome weak or moderate, Perioperative pain,Moderate to severe pain, Moderately or weakly expressed pain syndrome, Moderate to severe pain, Ear pain of otitis, Neuropathic pain, neuropathic pain

Code CAS 61-68-7

Characteristics of Mefenamic acid

Crystalline powder is grayish white in color. Almost nerastvorim in water, little soluble in alcohol.

Pharmacology

Pharmacological action - anti-inflammatory, antipyretic, analgesic.

Oppresses the synthesis of mediators of inflammation (PG, serotonin, kinin, etc.), reduces the activity of lysosome proteases involved in the inflammatory reaction. Affects the phases of exudation and proliferation. Stabilizes protein ultrastructure and cell membranes, reduces vascular permeability and swelling of tissues. It disintegrates oxidative phosphorylation, inhibits the synthesis of mucopolysaccharide. Suppresses the pro-inflammatory activity of serotonin. It inhibits the proliferation of cells in the inflammation focus, increases cell resistance and stimulates wound healing. In the analgesic effect, along with the influence on the central mechanisms of pain sensitivity, a significant role is played by local effects on the inflammation focus, the ability to inhibit the algogenicity of endogenous substances (kinins, histamine, serotonin). Antipyretic action is associated with the suppression of the synthesis of PG and the effect on the center of thermoregulation. Stimulates the formation of interferon.

After oral administration, it is quickly and sufficiently absorbed, creating Cmax after 2-4 hours. The blood level is proportional to the dose. The equilibrium concentration (20 μg / ml) is determined on the 2nd day of application (1 g 4 times a day). In the vascular bed it contacts with albumins. T1 / 2 - 3 hours. In the liver forms a number of metabolites (oxidized, hydrolyzed, glucuronidized). 67% of the accepted dose is excreted in the urine in unchanged form or in the form of biotransformation products, 20-25% with feces.

Application of Mefenamic acid

Acute rheumatism, nonspecific (rheumatoid) polyarthritis, Bechterew's disease, arthralgia, myalgia, neuralgia, headache, toothache, fever, infectious allergic myocarditis, dysmenorrhea, premenstrual syndrome, colds and febrile illnesses, influenza, periodontal diseases (locally in the form of sodium mefemenate).

Contraindications

Hypersensitivity, peptic ulcer of the stomach and duodenum, inflammatory diseases of the gastrointestinal tract, kidney and hemopoiesis.

Side effects of Mefenamic acid

Nausea, heartburn, diarrhea, abdominal pain, anorexia, flatulence, gastrointestinal bleeding, constipation, general weakness, drowsiness, nervousness, insomnia, visual impairment, albuminuria, allergic reactions (itching, face swelling, rash).

With prolonged use (12 months or more) - hemolytic anemia, a decrease in hematocrit, a violation of hematopoiesis. At a concentration in the blood of 100-200 μg / l and higher - muscle twitching, convulsions, vomiting.

Interaction

Salicylates and metamizole sodium increase the anti-inflammatory effect. Thiamine, pyridoxine, barbiturates, phenothiazine derivatives, narcotic analgesics, caffeine, phenacetin, diphenhydramine potentiate analgesia. Prolongs prothrombin time and increases the effectiveness of oral anticoagulants.

Precautions for Mefenamic acid

It is not recommended to use during pregnancy, tk. probably the effect on the fetal cardiovascular system. Can penetrate into breast milk, which limits the use of lactating women. To prevent complications from the gastrointestinal tract, it is recommended to take it after meals and drink it with milk. It should be borne in mind that cross-sensitization with other NSAIDs is not excluded. With the development of diarrhea, it is necessary to reduce the dose of mefenamic acid or temporarily to cancel it.

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