Drug: Carisoprodol and Aspirin

This is a combination product containing Carisoprodol, a centrally-acting muscle relaxant, plus aspirin, an analgesic with antipyretic and anti-inflammatory properties. It is available as a two layered, white and light lavender round tablet for oral administration. Chemically, Carisoprodol is N-isopropyl-2-methyl-2-propyl-1, 3-propanediol dicarbamate. Its empirical formula is C12H24N2O4, with a molecular weight of 260.33. The structural formula is: Chemically, aspirin is benzoic acid, 2-(acetyloxy)-. Its empirical formula is C9H8O4 with a molecular weight of 180.16. The structural formula is: Each tablet for oral administration contains Carisoprodol 200 mg and Aspirin 325 mg. Each tablet contains the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, D&C Red #30, FD&C Blue #1, magnesium stearate, microcrystalline cellulose, povidone, starch, stearic acid and other ingredients.

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If severe reactions occur, discontinue Carisoprodol and Aspirin Tablets and initiate appropriate symptomatic and supportive therapy. The following side effects which have occurred with the administration of the individual ingredients alone may also occur with the combination. Carisoprodol Central Nervous System: Drowsiness is the most frequent complaint and along with other CNS effects may require dosage reduction. Observed less frequently are dizziness, vertigo and ataxia. Tremor, agitation, irritability, headache, depressive reactions, syncope and insomnia have been infrequent or rare. Idiosyncratic: Idiosyncratic reactions are very rare. They are usually seen within the period of the first to fourth dose in patients having had no previous contact with the drug (see WARNINGS). Allergic: Skin rash erythema multiforme, pruritus, eosinophilia and fixed drug eruptions with cross-reaction to meprobamate have been reported. If allergic reactions occur, discontinue Carisoprodol and Aspirin Tablets and treat symptomatically. In evaluating possible allergic reactions, also consider allergy to excipients. Cardiovascular: Tachycardia, postural hypotension and facial flushing. Gastrointestinal: Nausea, vomiting, epigastric distress and hiccup. Hematologic: No serious blood dyscrasias have been attributed to carisoprodol alone. Leukopenia and pancytopenia have been reported, very rarely, in situations in which other drugs or viral infections may have been responsible. Aspirin The most common adverse reactions associated with the use of aspirin have been gastrointestinal, including nausea, vomiting, gastritis, occult bleeding, constipation and diarrhea. Gastric erosion, angioedema, asthma rash, pruritus and urticaria have been reported less commonly. Tinnitus is a sign of high serum salicylate levels (see OVERDOSAGE). Aspirin Intolerance: Allergic type reactions in aspirin-sensitive individuals may involve the respiratory tract or the skin. Symptoms of the former range from rhinorrhea and shortness of breath to severe asthma, and the latter may consist of urticaria, edema, rash or angioedema (giant hives). These may occur independently or in combination. Drug Abuse And Dependence Abuse: In clinical use, abuse has been rare. Dependence: In clinical use, dependence with Carisoprodol and Aspirin Tablets have been rare and there have been no reports of significant abstinence signs, nevertheless, the following information on the individual ingredients should be kept in mind. Carisoprodol: In dogs, no withdrawal symptoms occurred after abrupt cessation of carisoprodol from dosages as high as 1 gm/kg/ day. In a study in man, abrupt cessation of 100 mg/kg/day (about five times the recommended daily adult dosage) was followed in some subjects by mild withdrawal symptoms such as abdominal cramps, insomnia, chills, headache and nausea. Delirium and convulsions did not occur (see PRECAUTIONS). Read the Carisoprodol and Aspirin (carisoprodol and aspirin) Side Effects Center for a complete guide to possible side effectsLearn More »

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Usual Adult Dosage: 1 or 2 tablets, four times daily. Not recommended for use in children under age twelve (see PRECAUTIONS).

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Clinically important interactions may occur when certain drugs are administered concomitantly with aspirin or aspirin-containing drugs.
  1. Oral Anticoagulants - by interfering with platelet function or decreasing plasma prothrombin concentration, aspirin enhances the potential for bleeding in patients on anticoagulants.
  2. Methotrexate - aspirin enhances the toxic effects of the drug.
  3. Probenecid and Sulfinpyrazone - large doses of aspirin reduce the uricosuric effect of both drugs. Renal excretion of salicylate may also be reduced.
  4. Oral Antidiabetic Drug - enhancement of hypoglycemia may occur.
  5. Antacids - to the extent that they raise urinary pH, antacids may substantially decrease plasma salicylate concentrations; conversely, their withdrawal can result in a substantial increase.
  6. Ammonium Chloride - this and other drugs that acidify a relatively alkaline urine can elevate plasma salicylate concentrations.
  7. Ethyl Alcohol - enhanced aspirin-induced fecal blood loss has been reported.
  8. Corticosteroids - salicylate plasma levels may be decreased when adrenal corticosteroids are given, and may be increased substantially when they are discontinued.
Last reviewed on RxList: 5/28/2009
This monograph has been modified to include the generic and brand name in many instances.

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Carisoprodol and Aspirin Tablets are indicated as an adjunct to rest, physical therapy, and other measures for the relief of pain, muscle spasm, and limited mobility associated with acute, painful musculoskeletal conditions.

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Acute intermittent prophyria; bleeding disorders; allergic or idiosyncratic reactions to carisoprodol, aspirin, or related compounds. Last reviewed on RxList: 5/28/2009
This monograph has been modified to include the generic and brand name in many instances.

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Signs and Symptoms Any of the following which have been reported with the individual ingredients may occur and may be modified to a varying degree by the effects of the other ingredients present in Carisoprodol and Aspirin Tablets. Carisoprodol: Stupor, coma, shock, respiratory depression and very rarely, death. Overdosage with carisoprodol in combination with alcohol, other CNS depressants, or psychotropic agents can have additive effects, even when one of the agents has been taken in the usually recommended dosage. Aspirin: Headache, tinnitus, hearing difficulty, dim vision, dizziness, lassitude, hyperpnea, rapid breathing, thirst, nausea, vomiting, sweating and occasionally diarrhea are characteristic of mild to moderate salicylate poisoning. Salicylate poisoning should be considered in children with symptoms of vomiting, hyperpnea, and hyperthermia. Hyperpnea is an early sign of salicylate poisoning, but dyspnea supervenes at plasma levels above 50 mg/dl. These respiratory changes eventually lead to serious acid-base disturbances, Metabolic acidosis is a constant finding in infants but occurs in older children only with severe poisoning; adults usually exhibit respiratory alkalosis initially and acidosis terminally. Other symptoms of severe salicylate poisoning include hyperthermia, dehydration, delirium and mental disturbances. Skin eruptions, GI hemorrhage, or pulmonary edema are less common. Early CNS stimulation is replaced by increasing depression, stupor, and coma. Death is usually due to respiratory failure or cardiovascular collapse. Treatment General: Provide symptomatic and supportive treatment, as indicated. Any drug remaining in the stomach should be removed using appropriate procedures and caution to protect the airway and prevent aspiration, especially in the stuporous or comatose patient. Incomplete gastric emptying with delayed absorption of carisoprodol has been reported as a cause for relapse. Should respiration or blood pressure become compromised, respiratory assistance, central nervous system stimulants and pressor agents should be administered cautiously as indicated. Carisoprodol: The following have been used successfully in overdosage with the related drug meprobamate: diuretics, osmotic (mannitol) diuresis, peritoneal dialysis, and hemodialysis (see CLINICAL PHARMACOLOGY). Careful monitoring of urinary output is necessary and caution should be taken to avoid overhydration. Carisoprodol can be be measured in biological fluid by gas chromatography (Douglas, J.F., et al: J Pharm Sci 58:145, 1969). Aspirin: Since there are no specific antidotes for salicylate poisoning, the aim of treatment is to enhance elimination of salicylate and prevent or reduce further absorption; to correct any fluid electrolyte or metabolic imbalance; and to provide general and cardiorespiratory support. If acidosis is present, intravenous sodium bicarbonate must be given, along with adequate hydration, until salicylate levels decrease to within the therapeutic range. To enhance elimination, forced diuresis and alkalinization of the urine may be beneficial. The need for hemoperfusion or hemodialysis is rare and should be used only when other measures have failed.

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Tablets containing Carisoprodol 200 mg and Aspirin 325 mg are white and light lavender colored with characteristic dye spots, double layered round shape, unscored debossed with “Par 246”. Available in bottles of 100 (NDC 49884-246-01), 500 (NDC 49884-246-05), 1000 (NDC 49884-246-10). Store at controlled room temperature 15°C - 30°C (59°F - 86°F) protect from moisture. Manufactured by: Par Pharmaceutical, Inc. Spring Valley, NY 10977. Revised: 07/05 Last reviewed on RxList: 5/28/2009
This monograph has been modified to include the generic and brand name in many instances.

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General To avoid excessive accumulation of carisoprodol, aspirin, or their metabolites, use Carisoprodol and Aspirin Tablets with caution in patients with compromised liver or kidney function, or in elderly or debilitated patients (see CLINICAL PHARMACOLOGY). Use with caution in patients with history of gastritis or peptic ulcer, in patients on anti-coagulant therapy and in addiction-prone individuals. Carcinogenesis and Mutagenesis and Impairment of Fertility No long-term studies have been done with Carisoprodol and Aspirin Tablets. Pregnancy Teratogenic Effects: Pregnancy Category C. Adequate animal reproduction studies have not been conducted with Carisoprodol and Aspirin Tablets. It is also not known whether Carisoprodol and Aspirin Tablets can cause fetal harm when administered to a pregnant woman or can affect reproduction capacity. Carisoprodol and Aspirin Tablets should be given to a pregnant woman only if clearly needed. Studies in rodents have shown salicylates to be teratogenic when given in early gestation, and embryocidal when given in later gestation, in doses considerably greater than usual therapeutic doses in humans. Studies in women who took aspirin during pregnancy have not demonstrated an increased incidence of congenital abnormalities in the offspring. Labor and Delivery Ingestion of aspirin near term or prior to delivery may prolong delivery or lead to bleeding in mother, fetus or neonate. Nursing Mothers Carisoprodol is excreted in human milk in concentrations two-to-four times that in maternal plasma. Aspirin is excreted in human milk in moderate amounts and can produce a bleeding tendency in nursing infants. Because of the potential for serious adverse reactions in nursing infants, a decision should be made whether to discontinue nursing or the drug, taking into account the importance of the drug to the mother. Pediatric Use Safety and effectiveness in children below the age of twelve have not been established. Last reviewed on RxList: 5/28/2009
This monograph has been modified to include the generic and brand name in many instances.

Source: http://www.rxlist.com

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