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Ketoprofen

Prescription

Handelsnamen: Ketoprofen

Darreichungsform
Capsule
Applikationsweg
ORAL

About This Medication

DESCRIPTION Ketoprofen is a nonsteroidal anti-inflammatory drug. The chemical name for ketoprofen is (±)- m -Benzoylhydratropic acid with the following structural formula: Its molecular formula is C 16 H 14 O 3 , with a molecular weight of 254.29. It has a pKa of 5.94 in methanol:water (3:1) and an n-octanol:water partition coefficient of 0.97 (buffer pH 7.4). Ketoprofen, USP is a white or off-white, odorless, nonhygroscopic, fine to granular powder, melting at about 95°C. It is freely soluble in ethanol, chloroform, acetone, ether and soluble in benzene and strong alkali, but practically insoluble in water at 20°C. Each ketoprofen extended-release capsule, USP for oral administration contains 200 mg of ketoprofen, USP. In addition, each capsule contains the following inactive ingredients: ammonium hydroxide, black iron oxide, colloidal anhydrous silica, dibutyl sebacate, ethylcellulose, FD&C Blue No. 2, gelatin, hypromellose, maltodextrin, methacrylic acid copolymer type B, oleic acid, polyacrylate dispersion, silicon dioxide, sodium lauryl sulfate, sugar spheres, talc, titanium dioxide, triacetin, triethyl citrate and yellow iron oxide. In addition, the black imprinting ink contains the following: black iron oxide, D&C Yellow No. 10 Aluminum Lake, FD&C Blue No. 1 Aluminum Lake, FD&C Blue No. 2 Aluminum Lake, FD&C Red No. 40 Aluminum Lake, propylene glycol and shellac glaze. Ketoprofen Structural Formula

Wirkstoffe

Wirkstoff Stärke
Ketoprofen -

Indikationen und Anwendung

INDICATIONS AND USAGE Carefully consider the potential benefits and risks of ketoprofen extended-release capsules before deciding to use ketoprofen extended-release capsules. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see WARNINGS ). Ketoprofen extended-release capsules are indicated for the management of the signs and symptoms of rheumatoid arthritis and osteoarthritis. Ketoprofen extended-release capsules are not recommended for treatment of acute pain because of its extended-release characteristics (see CLINICAL PHARMACOLOGY: Pharmacokinetics ).

Dosierung und Verabreichung

DOSAGE AND ADMINISTRATION Carefully consider the potential benefits and risks of ketoprofen extended-release capsules and other treatment options before deciding to use ketoprofen extended-release capsules. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see WARNINGS ). After observing the response to initial therapy with ketoprofen extended-release capsules, the dose and frequency should be adjusted to suit an individual patient’s needs. Concomitant use of ketoprofen extended-release capsules is not recommended. If minor side effects appear, they may disappear at a lower dose which may still have an adequate therapeutic effect. If well tolerated but not optimally effective, the dosage may be increased. Individual patients may show a better response to 300 mg of ketoprofen capsules daily as compared to 200 mg, although in well-controlled clinical trials patients on 300 mg did not show greater mean effectiveness. They did, however, show an increased frequency of upper- and lower-GI distress and headaches. It is of interest that women also had an increased frequency of these adverse effects compared to men. When treating patients with 300 mg/day, the physician should observe sufficient increased clinical benefit to offset potential increased risk. In patients with mildly impaired renal function, the maximum recommended total daily dose of ketoprofen extended-release capsules is 150 mg. In patients with a more severe renal impairment (GFR less than 25 mL/min/1.73 m 2 or end-stage renal impairment), the maximum total daily dose of ketoprofen extended-release capsules should not exceed 100 mg. In elderly patients, renal function may be reduced with apparently normal serum creatinine and/or BUN levels. Therefore, it is recommended that the initial dosage of ketoprofen extended-release capsules should be reduced for patients over 75 years of age (see PRECAUTIONS: Geriatric Use ). It is recommended that for patients with impaired liver function and serum albumin concentration less than 3.5 g/dL, the maximum initial total daily dose of ketoprofen extended-release capsules should be 100 mg. All patients with metabolic impairment, particularly those with both hypoalbuminemia and reduced renal function, may have increased levels of free (biologically active) ketoprofen and should be closely monitored. The dosage may be increased to the range recommended for the general population, if necessary, only after good individual tolerance has been ascertained. Because hypoalbuminemia and reduced renal function both increase the fraction of free drug (biologically active form), patients who have both conditions may be at greater risk of adverse effects. Therefore, it is recommended that such patients also be started on lower doses of ketoprofen extended-release capsules and closely monitored. Rheumatoid Arthritis and Osteoarthritis The recommended starting dose of ketoprofen in otherwise healthy patients is for ketoprofen extended-release capsules 200 mg administered once a day. Smaller doses of ketoprofen extended-release capsules should be utilized initially in small individuals, or in debilitated or elderly patients. The recommended maximum daily dose of ketoprofen is 200 mg/day for ketoprofen extended-release capsules. Dosages higher than 200 mg/day of ketoprofen extended-release capsules are not recommended because they have not been studied. Concomitant use of ketoprofen extended-release capsules is not recommended. Relatively smaller people may need smaller doses. As with other nonsteroidal anti-inflammatory drugs, the predominant adverse effects of ketoprofen are gastrointestinal. To attempt to minimize these effects, physicians may wish to prescribe that ketoprofen extended-release capsules be taken with antacids, food, or milk. Although food delays the absorption of both formulations (see CLINICAL PHARMACOLOGY ) in most of the clinical trials ketoprofen was taken with food or milk. Physicians may want to make specific recommendations to patients about when they should take ketoprofen extended-release capsules in relation to food and/or what patients should do if they experience minor GI symptoms associated with either formulation. Management of Pain and Dysmenorrhea Ketoprofen extended-release capsules are not recommended for use in treating acute pain because of its extended-release characteristics.

Side Effects Overview

ADVERSE REACTIONS The incidence of common adverse reactions (above 1%) was obtained from a population of 835 ketoprofen capsules-treated patients in double-blind trials lasting from 4 to 54 weeks and in 622 ketoprofen extended-release capsules treated (200 mg/day) patients in trials lasting from 4 to 16 weeks. Minor gastrointestinal side effects predominated; upper gastrointestinal symptoms were more common than lower gastrointestinal symptoms. In crossover trials in 321 patients with rheumatoid arthritis or osteoarthritis, there was no difference in either upper or lower gastrointestinal symptoms between patients treated with 200 mg of ketoprofen extended-release capsules once a day or 75 mg of ketoprofen capsules TID (225 mg/day). Peptic ulcer or GI bleeding occurred in controlled clinical trials in less than 1% of 1,076 patients; however, in open label continuation studies in 1,292 patients the rate was greater than 2%. The incidence of peptic ulceration in patients on NSAIDs is dependent on many risk factors including age, sex, smoking, alcohol use, diet, stress, concomitant drugs such as aspirin and corticosteroids, as well as the dose and duration of treatment with NSAIDs (see WARNINGS ). Gastrointestinal reactions were followed in frequency by central nervous system side effects, such as headache, dizziness, or drowsiness. The incidence of some adverse reactions appears to be dose-related (see DOSAGE AND ADMINISTRATION ). Rare adverse reactions (incidence less than 1%) were collected from one or more of the following sources: foreign reports to manufacturers and regulatory agencies, publications, U.S. clinical trials, and/or U.S. postmarketing spontaneous reports. Reactions are listed below under body system, then by incidence or number of cases in decreasing incidence. Incidence Greater Than 1% (Probable Causal Relationship) Digestive: Dyspepsia (11%), nausea*, abdominal pain*, diarrhea*, constipation*, flatulence*, anorexia, vomiting, stomatitis. Nervous System: Headache*, dizziness, CNS inhibition (i.e., pooled reports of somnolence, malaise, depression, etc.) or excitation (i.e., insomnia, nervousness, dreams, etc.)*. Special Senses: Tinnitus, visual disturbance. Skin and Appendages: Rash. Urogenital: Impairment of renal function (edema, increased BUN)*, signs or symptoms of urinary-tract irritation. *Adverse events occurring in 3 to 9% of patients. Incidence Less than 1% (Probable Causal Relationship) Body as a Whole: Chills, facial edema, infection, pain, allergic reaction, anaphylaxis. Cardiovascular: Hypertension, palpitation, tachycardia, congestive heart failure, peripheral vascular disease, vasodilation. Digestive: Appetite increased, dry mouth, eructation, gastritis, rectal hemorrhage, melena, fecal occult blood, salivation, peptic ulcer, gastrointestinal perforation, hematemesis, intestinal ulceration, hepatic dysfunction, hepatitis, cholestatic hepatitis, jaundice. Hemic: Hypocoagulability, agranulocytosis, anemia, hemolysis, purpura, thrombocytopenia. Metabolic and Nutritional: Thirst, weight gain, weight loss, hyponatremia. Musculoskeletal: Myalgia. Nervous System: Amnesia, confusion, impotence, migraine, paresthesia, vertigo. Respiratory: Dyspnea, hemoptysis, epistaxis, pharyngitis, rhinitis, bronchospasm, laryngeal edema. Skin and Appendages: Alopecia, eczema, pruritus, purpuric rash, sweating, urticaria, bullous rash, exfoliative dermatitis, photosensitivity, skin discoloration, onycholysis, toxic epidermal necrolysis, erythema multiforme, Stevens‑Johnson syndrome, and fixed drug eruption (FDE). Special Senses: Conjunctivitis, conjunctivitis sicca, eye pain, hearing impairment, retinal hemorrhage and pigmentation change, taste perversion. Urogenital: Menometrorrhagia, hematuria, renal failure, interstitial nephritis, nephrotic syndrome. Incidence Less Than 1% (Causal Relationship Unknown) The following rare adverse reactions, whose causal relationship to ketoprofen is uncertain, are being listed to serve as alerting information to the physician. Body as a Whole: Septicemia, shock. Cardiovascular: Arrhythmias, myocardial infarction. Digestive: Buccal necrosis, ulcerative colitis, microvesicular steatosis, pancreatitis. Endocrine: Diabetes mellitus (aggravated). Nervous System: Dysphoria, hallucination, libido disturbance, nightmares, personality disorder, aseptic meningitis. Urogenital: Acute tubulopathy, gynecomastia.

Warnhinweise und Vorsichtsmaßnahmen

Kontraindikationen

Pharmakokinetik

Pharmacokinetics General Ketoprofen extended-release capsules contain ketoprofen. They differ only in their release characteristics. Ketoprofen capsules release drug in stomach whereas ketoprofen extended-release capsules are designed to resist dissolution in the low pH of gastric fluid but release drug at a controlled rate in the higher pH environment of the small intestine (see DESCRIPTION ). Irrespective of the pattern of release, the systemic availability (F s ) when either oral formulation is compared with IV administration is approximately 90% in humans. For 75 to 200 mg single doses, the area under the curve has been shown to be dose proportional. The figure depicts the plasma time curves associated with both products. Ketoprofen is > 99% bound to plasma proteins, mainly to albumin. Separate sections follow which delineate differences between ketoprofen capsules and ketoprofen extended-release capsules. Absorption Ketoprofen capsules are rapidly and well-absorbed, with peak plasma levels occurring within 0.5 to 2 hours. Ketoprofen extended-release capsules are also well-absorbed from this dosage form, although an observable increase in plasma levels does not occur until approximately 2 to 3 hours after taking the formulation. Peak plasma levels are usually reached 6 to 7 hours after dosing. (See Figure and Table, below). When ketoprofen is administered with food, its total bioavailability (AUC) is not altered; however, the rate of absorption from either dosage form is slowed. Ketoprofen capsules – Food intake reduces C max by approximately one-half and increases the mean time to peak concentration (t max ) from 1.2 hours for fasting subjects (range, 0.5 to 3 hours) to 2.0 hours for fed subjects (range, 0.75 to 3 hours). The fluctuation of plasma peaks may also be influenced by circadian changes in the absorption process. Concomitant administration of magnesium hydroxide and aluminum hydroxide does not interfere with absorption of ketoprofen capsules. Ketoprofen extended-release capsules – Administration of ketoprofen extended-release capsules with a high-fat meal causes a delay of about 2 hours in reaching the C max ; neither the total bioavailability (AUC) nor the C max is affected. Circadian changes in the absorption process have not been studied. The administration of antacids or other drugs which may raise stomach pH would not be expected to change the rate or extent of absorption of ketoprofen extended-release capsules. Multiple Dosing Steady-state concentrations of ketoprofen are attained within 24 hours after commencing treatment with ketoprofen extended-release capsules. In studies with healthy male volunteers, trough levels at 24 hours following administration of ketoprofen 200 mg extended-release capsules were 0.4 mg/L compared with 0.07 mg/L at 24 hours following administration of ketoprofen 50 mg capsules QID (12 hours), or 0.13 mg/L following administration of ketoprofen 75 mg capsules TID for 12 hours. Thus, relative to the peak plasma concentration, the accumulation of ketoprofen after multiple doses of ketoprofen extended-release capsules is minimal. The figure below shows a reduction in peak height and area after the second 50 mg dose. This is probably due to a combination of food effects, circadian effects, and plasma sampling times. It is unclear to what extent each factor contributes to the loss of peak height and area. The shaded area represents ± 1 standard deviation (S.D.) around the mean for ketoprofen capsules or ketoprofen extended-release capsules. KETOPROFEN PLASMA CONCENTRATIONS IN SUBJECTS RECEIVING 200 MG OF KETOPROFEN EXTENDED-RELEASE CAPSULES ONCE A DAY (QD), OR 50 MG OF KETOPROFEN CAPSULES EVERY 4 HOURS FOR 16 HOURS COMPARISON OF PHARMACOKINETIC PARAMETERS Values expressed are mean ± standard deviation FOR KETOPROFEN CAPSULES AND KETOPROFEN EXTENDED-RELEASE CAPSULES Kinetic Parameters Ketoprofen Immediate-Release (4 x 50 mg) Ketoprofen Extended-Release (1 x 200 mg) Extent of oral absorption (bioavailability) F s (%) ~ 90 ~ 90 Peak plasma levels C max (mg/L) Fasted 3.9 ± 1.3 3.1 ± 1.2 Fed 2.4 ± 1.0 3.4 ± 1.3 Time to peak concentration t max (h) Fasted 1.2 ± 0.6 6.8 ± 2.1 Fed 2.0 ± 0.8 9.2 ± 2.6 Area under plasma concentration-time curve AUC 0-24h (mg•h/L) Fasted 32.1 ± 7.2 30.1 ± 7.9 Fed 36.6 ± 8.1 31.3 ± 8.1 Oral-dose clearance CL/F (L/h) 6.9 ± 0.8 6.8 ± 1.8 Half-life t 1/2 (h) 2.1 ± 1.2 5.4 ± 2.2 [See footnote In the case of ketoprofen extended-release capsules, absorption is slowed, intrinsic clearance is unchanged, but because the rate of elimination is dependent on absorption, the half-life is prolonged. ] KETOPROFEN PLASMA CONCENTRATIONS IN SUBJECTS RECEIVING 200 MG OF KETOPROFEN EXTENDED-RELEASE CAPSULES ONCE A DAY (QD), OR 50 MG OF KETOPROFEN CAPSULES EVERY 4 HOURS FOR 16 HOURS Metabolism The metabolic fate of ketoprofen is glucuronide conjugation to form an unstable acyl-glucuronide. The glucuronic acid moiety can be converted back to the parent compound. Thus, the metabolite serves as a potential reservoir for parent drug, and this may be important in persons with renal insufficiency, whereby the conjugate may accumulate in the serum and undergo deconjugation back to the parent drug (see CLINICAL PHARMACOLOGY: Special Populations: Renally Impaired ). The conjugates are reported to appear only in trace amounts in plasma in healthy adults, but are higher in elderly subjects — presumably because of reduced renal clearance. It has been demonstrated that in elderly subjects following multiple doses (50 mg every 6 h), the ratio of conjugated to parent ketoprofen AUC was 30% and 3%, respectively, for the S & R enantiomers. There are no known active metabolites of ketoprofen. Ketoprofen has been shown not to induce drug-metabolizing enzymes. Elimination The plasma clearance of ketoprofen is approximately 0.08 L/kg/h with a V d of 0.1 L/kg after IV administration. The elimination half‑life of ketoprofen has been reported to be 2.05 ± 0.58 h (Mean ± S.D.) following IV administration, from 2 to 4 h following administration of ketoprofen capsules, and 5.4 ± 2.2 h after administration of ketoprofen 200 mg extended-release capsules. In cases of slow drug absorption, the elimination rate is dependent on the absorption rate and thus t 1/2 relative to an IV dose appears prolonged. After a single 200 mg dose of ketoprofen extended-release capsules, the plasma levels decline slowly, and average 0.4 mg/L after 24 hours (see Figure above). In a 24-hour period, approximately 80% of an administered dose of ketoprofen is excreted in the urine, primarily as the glucuronide metabolite. Enterohepatic recirculation of the drug has been postulated, although biliary levels have never been measured to confirm this.

Frequently Asked Questions

INDICATIONS AND USAGE Carefully consider the potential benefits and risks of ketoprofen extended-release capsules before deciding to use ketoprofen extended-release capsules. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see WARNINGS ). Ketoprofen extended-release capsules are indicated for the management of the signs and symptoms of rheumatoid arthritis and osteoarthritis. Ketoprofen extended-release capsules are not recommended for treatment of acute pain because of its extended-release characteristics (see CLINICAL PHARMACOLOGY: Pharmacokinetics ).

DOSAGE AND ADMINISTRATION Carefully consider the potential benefits and risks of ketoprofen extended-release capsules and other treatment options before deciding to use ketoprofen extended-release capsules. Use the lowest effective dose for the shortest duration consistent with individual patient treatment goals (see WARNINGS ). After observing the response to initial therapy with ketoprofen extended-release capsules, the dose and frequency should be adjusted to suit an individual patient’s needs. Concomitant use of ketoprofen extended-release capsules is not recommended. If minor side effects …

WARNINGS Cardiovascular Effects Cardiovascular Thrombotic Events Clinical trials of several COX-2 selective and nonselective NSAIDs of up to three years duration have shown an increased risk of serious cardiovascular (CV) thrombotic events, including myocardial infarction (MI) and stroke, which can be fatal. Based on available data, it is unclear that the risk for CV thrombotic events is similar for all NSAIDs. The relative increase in serious CV thrombotic events over baseline conferred by NSAID use appears to be similar in …

CONTRAINDICATIONS Ketoprofen extended-release capsules are contraindicated in patients who have shown hypersensitivity to ketoprofen. Ketoprofen extended-release capsules should not be given to patients who have experienced asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs. Severe, rarely fatal, anaphylactic reactions to ketoprofen have been reported in such patients (see WARNINGS: Anaphylactoid Reactions and PRECAUTIONS: General: Preexisting Asthma ). Ketoprofen extended-release capsules are contraindicated in the setting of coronary artery bypass graft (CABG) surgery (see WARNINGS ).

Ketoprofen is a prescription medication. You will need a valid prescription from a licensed healthcare provider.

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References & Data Sources

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Data sources: ChEMBL, PubChem, DailyMed.