in moderation [100:400 mcg/mL, approximately 90 and 76 percent of plasma salicylate is bound to albumin, respectively. Metabolism: Aspirin, which has a half-life of about 15 minutes, is hydrolyzed in the plasma to salicylic acid such that plasma levels of aspirin may not be detectable 1 to 2 hours after dosing. Salicylic acid, which has a plasma half-life of approximately 6 hours, is conjugated in the liver to form salicyluric acid, salicyl phenolic glucuronide, salicyl acyl glucuronide, gentisic acid, and gentisuric acid. At higher serum concentrations of salicylic acid, the total clearance of salicylic acid decreases due to the limited ability of the liver to form both salicyluric acid and phenolic glucuronide. Following toxic doses of aspirin (e.g., > 10 grams), the plasma half-life of salicylic acid may be increased to over 20 hours. Elimination: The elimination of salicylic acid is constant in relation to the plasma salicylic acid concentration. Following therapeutic doses of aspirin, approximately 75, 10, 10, and 5 percent is found excreted in the urine as salicyluric acid, salicylic acid, a phenolic glucuronide of salicylic acid, and an acyl glucuronide of salicylic acid, respectively. As the urinary pH rises above 6.5, the renal clearance of free salicylate increases from less than 5 percent to greater than 80 percent. Alkalinization of the urine is a key concept in the management of salicylate overdose [see OVERDOSAGE, Treatment of Overdosage ]. Clearance of salicylic acid is also reduced in patients with renal impairment. Codeine Phosphate: Absorption: Codeine is readily absorbed from the GI tract. At therapeutic doses, the analgesic effect reaches a peak within 2 hours and persists between 4 and 6 hours. Distribution: Codeine is rapidly distributed from the intravascular spaces to the tissues with preferential uptake by the liver, spleen, and kidney. Codeine crosses the blood-brain barrier, and is found in fetal tissue and breast milk. The plasma concentration of codeine does not correlate with brain concentration of codeine or the relief of pain. Metabolism: The plasma half-life of codeine is about 2.9 hours. Elimination: The elimination of codeine is primarily via the kidneys, and about 90% of an oral dose is excreted by the kidneys within 24 hours of dosing. The urinary secretion products consist of free and glucuronide-conjugated codeine (about 70%), free and conjugated norcodeine (about 10%), free and conjugated morphine (about 10%), normorphine (4%), and hydrocodone (1%). The remainder of the dose is excreted in the feces. Indications and Usage for Carisoprodol, Aspirin, Codeine Carisoprodol, Aspirin and Codeine Phosphate Tablets, USP are indicated for the relief of discomfort associated with acute, painful musculoskeletal conditions in adults. Limitations of Use Because of the risks of addiction, abuse, and misuse with opioids, even at recommended doses (see WARNINGS), reserve Carisoprodol, Aspirin and Codeine Phosphate Tablets for use in patients for whom alternative treatment options (e.g., non-opioid analgesics): Have not been tolerated, or are not expected to be tolerated, Have not provided adequate analgesia, or are not expected to provide adequate analgesia Carisoprodol, Aspirin and Codeine Phosphate Tablets,USP should only be used for short periods (up to two or three weeks) because adequate evidence of effectiveness for more prolonged use has not been established and because acute, painful musculoskeletal conditions are generally of short duration (see DOSAGE AND ADMINISTRATION ). Contraindications Carisoprodol, Aspirin and Codeine Phosphate Tablets are contraindicated for: All children younger than 12 years of age (see WARNINGS ) Post-operative pain management in children of any age who have undergone tonsillectomy and/or adenoidectomy (see WARNINGS ) Carisoprodol, Aspirin and Codeine Phosphate Tablets are also contraindicated in patients with: Significant respiratory depression (see WARNINGS ) Acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative equipment (see WARNINGS ) Concurrent use of monoamine oxidase inhibitors (MAOIs) or use of MAOIs within the last 14 days (see WARNINGS and PRECAUTIONS; Drug Interactions ). Known or suspected gastrointestinal obstruction, including paralytic ileus (see WARNINGS ) Hypersensitivity to codeine, aspirin, or a carbamate such as meprobamate (e.g., anaphylaxis) Hemophilia (see WARNINGS ) Reye s Syndrome (see WARNINGS ) Known allergy to nonsteroidal anti-inflammatory drugs (NSAIDs) (see WARNINGS ) Syndrome of asthma, rhinitis, and nasal polyps (see WARNINGS ) Acute intermittent porphyria Warnings Addiction, Abuse, and Misuse Carisoprodol, Aspirin, and Codeine Phosphate Tablets contains codeine and carisoprodol. Codeine in combination with carisoprodol and aspirin is a Schedule III controlled substance. As Carisoprodol, Aspirin, and Codeine Phosphate Tablets contains carisoprodol and codeine, it exposes users to the risks of addiction, abuse, and misuse (see DRUG ABUSE AND DEPENDENCE ). Although the risk of addiction in any individual is unknown, it can occur in patients appropriately prescribed Carisoprodol, Aspirin, and Codeine Phosphate Tablets. Addiction can occur at recommended dosages and if the drug is misused or abused. Assess each patient s risk for addiction, abuse, or misuse prior to prescribing Carisoprodol, Aspirin, and Codeine Phosphate Tablets, and monitor all patients receiving Carisoprodol, Aspirin, and Codeine Phosphate Tablets for the development of these behaviors and conditions. Risks are increased in patients with a personal or family history of substance abuse (including drug or alcohol abuse or addiction) or mental illness (e.g., major depression). The potential for these risks should not, however, prevent the proper management of pain in any given patient. Patients at increased risk may be prescribed opioids such as Carisoprodol, Aspirin, and Codeine Phosphate Tablets, but use in such patients necessitates intensive counseling about the risks and proper use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets along with intensive monitoring for signs of addiction, abuse, and misuse. Opioids and carisoprodol are sought by drug abusers and people with addiction disorders and are subject to criminal diversion. Consider these risks when prescribing or dispensing Carisoprodol, Aspirin, and Codeine Phosphate Tablets. Strategies to reduce these risks include prescribing the drug in the smallest appropriate quantity and advising the patient on the proper disposal of unused drug (see PRECAUTIONS; Information for Patients ). Contact local state professional licensing board or state controlled substances authority for information on how to prevent and detect abuse or diversion of this product. Life-Threatening Respiratory Depression Serious, life-threatening, or fatal respiratory depression has been reported with the use of opioids, even when used as recommended. Respiratory depression, if not immediately recognized and treated, may lead to respiratory arrest and death. Management of respiratory depression may include close observation, supportive measures, and use of opioid antagonists, depending on the patient s clinical status (see OVERDOSAGE ). Carbon dioxide (CO 2 ) retention from opioid-induced respiratory depression can exacerbate the sedating effects of opioids. While serious, life-threatening, or fatal respiratory depression can occur at any time during the use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets, the risk is greatest during the initiation of therapy or following a dosage increase. Monitor patients closely for respiratory depression, especially within the first 24-72 hours of initiating therapy with and following dosage increases of Carisoprodol, Aspirin, and Codeine Phosphate Tablets. To reduce the risk of respiratory depression, proper dosing and titration of Carisoprodol, Aspirin, and Codeine Phosphate Tablets are essential (see DOSAGE AND ADMINISTRATION ). Overestimating the Carisoprodol, Aspirin, and Codeine Phosphate Tablets dosage when converting patients from another opioid product can result in a fatal overdose with the first dose. Accidental ingestion of Carisoprodol, Aspirin, and Codeine Phosphate Tablets, especially by children, can result in respiratory depression and death due to an overdose of codeine and carisoprodol. Ultra-Rapid Metabolism of Codeine and Other Risk Factors for Life-threatening Respiratory Depression in Children Life-threatening respiratory depression and death have occurred in children who received codeine. Codeine is subject to variability in metabolism based upon CYP2D6 genotype (described below), which can lead to an increased exposure to the active metabolite morphine. Based upon post-marketing reports, children less than 12 years old appear to be more susceptible to the respiratory depressant effects of codeine, particularly if there are risk factors for respiratory depression. For example, many reported cases of death occurred in the post-operative period following tonsillectomy and/or adenoidectomy, and many of the children had evidence of being ultra-rapid metabolizers of codeine. Furthermore, children with obstructive sleep apnea who are treated with codeine for post-tonsillectomy and/or adenoidectomy pain may be particularly sensitive to its respiratory depressant effect. Because of the risk of life-threatening respiratory depression and death: Carisoprodol, Aspirin and Codeine Phosphate Tablets are contraindicated for all children younger than 12 years of age (see CONTRAINDICATIONS ). Carisoprodol, Aspirin and Codeine Phosphate Tablets are contraindicated for post-operative management in pediatric patients younger than 18 years of age following tonsillectomy and/or adenoidectomy (see CONTRAINDICATIONS ). Avoid the use of Carisoprodol, Aspirin and Codeine Phosphate Tablets in adolescents 12 to 18 years of age who have other risk factors that may increase their sensitivity to the respiratory depressant effects of codeine unless the benefits outweigh the risks. Risk factors include conditions associated with hypoventilation, such as postoperative status, obstructive sleep apnea, severe pulmonary disease, neuromuscular disease, and concomitant use of other medications that cause respiratory depression. As with adults, when prescribing codeine for adolescents, healthcare providers should choose the lowest effective dose for the shortest period of time and inform patients and caregivers about these risks and the signs of morphine overdose (see PRECAUTIONS; Pediatric Use, OVERDOSAGE ). Nursing Mothers At least one death was reported in a nursing infant who was exposed to high levels of morphine in breast milk because the mother was an ultra-rapid metabolizer of codeine. Breastfeeding is not recommended during treatment with Carisoprodol, Aspirin and Codeine Phosphate Tablets (see PRECAUTIONS; Nursing Mothers ). CYP2D6 Genetic Variability: Ultra-rapid metabolizer Some individuals may be ultra-rapid metabolizers because of a specific CYP2D6 genotype (gene duplications denoted as *1/*1xN or *1/*2xN). The prevalence of this CYP2D6 phenotype varies widely and has been estimated at 1 to 10% for Whites (European, North American), 3 to 4% for Blacks (African Americans), 1 to 2% for East Asians (Chinese, Japanese, Korean), and may be greater than 10% in certain ethnic groups (i.e., Oceanian, Northern African, Middle Eastern, Ashkenazi Jews, Puerto Rican). These individuals convert codeine into its active metabolite, morphine, more rapidly and completely than other people. This rapid conversion results in higher than expected serum morphine levels. Even at labeled dosage regimens, individuals who are ultra-rapid metabolizers may have life-threatening or fatal respiratory depression or experience signs of overdose (such as extreme sleepiness, confusion, or shallow breathing) (see OVERDOSAGE). Therefore, individuals who are ultra-rapid metabolizers should not use codeine. Neonatal Opioid Withdrawal Syndrome Prolonged use of Carisoprodol, Aspirin and Codeine Phosphate Tablets during pregnancy can result in withdrawal in the neonate. Neonatal opioid withdrawal syndrome, unlike opioid withdrawal syndrome in adults, may be life-threatening if not recognized and treated, and requires management according to protocols developed by neonatology experts. Observe newborns for signs of neonatal opioid withdrawal syndrome and manage accordingly. Advise pregnant women using opioids for a prolonged period of the risk of neonatal opioid withdrawal syndrome and ensure that appropriate treatment will be available (see PRECAUTIONS; Pregnancy, Information for Patients ). Risks of Interactions with Drugs Affecting Cytochrome P450 Isoenzymes The effects of concomitant use or discontinuation of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with codeine are complex. Use of cytochrome P450 3A4 inducers, 3A4 inhibitors, or 2D6 inhibitors with Carisoprodol, Aspirin, and Codeine Phosphate Tablets requires careful consideration of the effects on codeine and the active metabolite, morphine. Cytochrome P450 3A4 Interaction The concomitant use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets with all cytochrome P450 3A4 inhibitors, such as macrolide antibiotics (e.g., erythromycin), azole-antifungal agents (e.g., ketoconazole), and protease inhibitors (e.g., ritonavir) or discontinuation of a cytochrome P450 3A4 inducer such as rifampin, carbamazepine, and phenytoin, may result in an increase in codeine plasma concentrations with subsequently greater metabolism by cytochrome P450 2D6, resulting in greater morphine levels, which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. The concomitant use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets with all cytochrome P450 3A4 inducers or discontinuation of a cytochrome P450 3A4 inhibitor may result in lower codeine levels, greater norcodeine levels, and less metabolism via 2D6 with resultant lower morphine levels. This may be associated with a decrease in efficacy, and in some patients, may result in signs and symptoms of opioid withdrawal. Follow patients receiving Carisoprodol, Aspirin, and Codeine Phosphate Tablets and any CYP3A4 inhibitor or inducer for signs and symptoms that may reflect opioid toxicity and opioid withdrawal when Carisoprodol, Aspirin, and Codeine Phosphate Tablets is used in conjunction with inhibitors and inducers of CYP3A4. If concomitant use of a CYP3A4 inhibitor is necessary or if a CYP3A4 inducer is discontinued, consider dosage reduction of Carisoprodol, Aspirin, and Codeine Phosphate Tablets until stable drug effects are achieved. Monitor patients for respiratory depression and sedation at frequent intervals. If concomitant use of a CYP3A4 inducer is necessary or if a CYP3A4 inhibitor is discontinued, consider increasing the Carisoprodol, Aspirin, and Codeine Phosphate Tablets dosage until stable drug effects are achieved. Monitor for signs of opioid withdrawal. (see PRECAUTIONS; Drug Interactions ). Risks of Concomitant Use or Discontinuation of Cytochrome P450 2D6 Inhibitors The concomitant use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets with all cytochrome P450 2D6 inhibitors (e.g., amiodarone, quinidine) may result in an increase in codeine plasma concentrations and a decrease in active metabolite morphine plasma concentration which could result in an analgesic efficacy reduction or symptoms of opioid withdrawal. Discontinuation of a concomitantly used cytochrome P450 2D6 inhibitor may result in a decrease in codeine plasma concentration and an increase in active metabolite morphine plasma concentration which could increase or prolong adverse reactions and may cause potentially fatal respiratory depression. Follow patients receiving Carisoprodol, Aspirin, and Codeine Phosphate Tablets and any CYP2D6 inhibitor for signs and symptoms that may reflect opioid toxicity and opioid withdrawal when Carisoprodol, Aspirin, and Codeine Phosphate Tablets are used in conjunction with inhibitors of CYP2D6. If concomitant use with a CYP2D6 inhibitor is necessary, follow the patient for signs of reduced efficacy or opioid withdrawal and consider increasing the Carisoprodol, Aspirin, and Codeine Phosphate Tablets dosage. After stopping use of a CYP2D6 inhibitor, consider reducing the Carisoprodol, Aspirin, and Codeine Phosphate Tablets dosage and follow the patient for signs and symptoms of respiratory depression or sedation (see PRECAUTIONS; Drug Interactions ). Risks from Concomitant Use with Benzodiazepines or Other CNS Depressants Profound sedation, respiratory depression, coma, and death may result from the concomitant use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets with benzodiazepines or other CNS depressants (e.g., non-benzodiazepine sedatives/hypnotics, anxiolytics, tranquilizers, muscle relaxants, general anesthetics, antipsychotics, other opioids, alcohol). Because of these risks, reserve concomitant prescribing of these drugs for use in patients for whom alternative treatment options are inadequate. Observational studies have demonstrated that concomitant use of opioid analgesics and benzodiazepines increases the risk of drug-related mortality compared to use of opioid analgesics alone. Because of similar pharmacological properties, it is reasonable to expect similar risk with the concomitant use of other CNS depressant drugs with opioid analgesics (see PRECAUTIONS; Drug Interactions). If the decision is made to prescribe a benzodiazepine or other CNS depressant concomitantly with an opioid analgesic, prescribe the lowest effective dosages and minimum durations of concomitant use. In patients already receiving an opioid analgesic, prescribe a lower initial dose of the benzodiazepine or other CNS depressant than indicated in the absence of an opioid, and titrate based on clinical response. If an opioid analgesic is initiated ina patient already taking a benzodiazepine or other CNS depressant, prescribe a lower initial dose of the opioid analgesic, and titrate based on clinical response. Follow patients closely for signs and symptoms of respiratory depression and sedation. Advise both patients and caregivers about the risks of respiratory depression and sedation when Carisoprodol, Aspirin, and Codeine Phosphate Tablets is used with benzodiazepines or other CNS depressants (including alcohol and illicit drugs). Advise patients not to drive or operate heavy machinery until the effects of concomitant use of the benzodiazepine or other CNS depressant have been determined. Screen patients for risk of substance use disorders, including opioid abuse and misuse, and warn them of the risk for overdose and death associated with the use of additional CNS depressants including alcohol and illicit drugs (see PRECAUTIONS, Drug Interactions , Information for Patients ). Life-Threatening Respiratory Depression in Patients with Chronic Pulmonary Disease or in Elderly, Cachectic, or Debilitated Patients The use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets in patients with acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative equipment is contraindicated. Patients with Chronic Pulmonary Disease: Carisoprodol, Aspirin, and Codeine Phosphate Tablets-treated patients with significant chronic obstructive pulmonary disease or cor pulmonale, and those with a substantially decreased respiratory reserve, hypoxia, hypercapnia, or pre-existing respiratory depression are at increased risk of decreased respiratory drive including apnea, even at recommended dosages of Carisoprodol, Aspirin, and Codeine Phosphate Tablets (see WARNINGS ). Elderly, Cachectic, or Debilitated Patients: Life-threatening respiratory depression is more likely to occur in elderly, cachectic, or debilitated patients because they may have altered pharmacokinetics or altered clearance compared to younger, healthier patients (see WARNINGS ). Monitor such patients closely, particularly when initiating and titrating Carisoprodol, Aspirin, and Codeine Phosphate Tablets and when Carisoprodol, Aspirin, and Codeine Phosphate Tablets is given concomitantly with other drugs that depress respiration (see WARNINGS ). Alternatively, consider the use of non-opioid analgesics in these patients. Interaction with Monoamine Oxidase Inhibitors Monoamine oxidase inhibitors (MAOIs) may potentiate the effects of morphine, codeine s active metabolite, including respiratory depression, coma, and confusion. Carisoprodol, Aspirin, and Codeine Phosphate Tablets should not be used in patients taking MAOIs or within 14 days of stopping such treatment. Adrenal Insufficiency Cases of adrenal insufficiency have been reported with opioid use, more often following greater than one month of use. Presentation of adrenal insufficiency may include non-specific symptoms and signs including nausea, vomiting, anorexia, fatigue, weakness, dizziness, and low blood pressure. If adrenal insufficiency is suspected, confirm the diagnosis with diagnostic testing as soon as possible. If adrenal insufficiency is diagnosed, treat with physiologic replacement doses of corticosteroids. Wean the patient off of the opioid to allow adrenal function to recover and continue corticosteroid treatment until adrenal function recovers. Other opioids may be tried as some cases reported use of a different opioid without recurrence of adrenal insufficiency. The information available does not identify any particular opioids as being more likely to be associated with adrenal insufficiency. Severe Hypotension Carisoprodol, Aspirin, and Codeine Phosphate Tablets may cause severe hypotension including orthostatic hypotension and syncope in ambulatory patients. There is increased risk in patients whose ability to maintain blood pressure has already been compromised by a reduced blood volume or concurrent administration of certain CNS depressant drugs (e.g., phenothiazines or general anesthetics) (see PRECAUTIONS; Drug Interactions ). Monitor these patients for signs of hypotension after initiating or titrating the dosage of Carisoprodol, Aspirin, and Codeine Phosphate Tablets. In patients with circulatory shock, Carisoprodol, Aspirin, and Codeine Phosphate Tablets may cause vasodilation that can further reduce cardiac output and blood pressure. Avoid the use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets in patients with circulatory shock. Risks of Use in Patients with Increased Intracranial Pressure, Brain Tumors, Head Injury, or Impaired Consciousness In patients who may be susceptible to the intracranial effects of CO2 retention (e.g., those with evidence of increased intracranial pressure or brain tumors), Carisoprodol, Aspirin, and Codeine Phosphate Tablets may reduce respiratory drive, and the resultant CO2 retention can further increase intracranial pressure. Monitor such patients for signs of sedation and respiratory depression, particularly when initiating therapy with Carisoprodol, Aspirin, and Codeine Phosphate Tablets. Opioids may also obscure the clinical course in a patient with a head injury. Avoid the use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets in patients with impaired consciousness or coma. Risks of Use in Patients with Gastrointestinal Conditions Including Peptic Ulcer Disease Carisoprodol, Aspirin, and Codeine Phosphate Tablets is contraindicated in patients with known or suspected gastrointestinal obstruction, including paralytic ileus. The codeine in Carisoprodol, Aspirin, and Codeine Phosphate Tablets may cause spasm of the sphincter of Oddi. Opioids may cause increases in serum amylase. Monitor patients with biliary tract disease, including acute pancreatitis for worsening symptoms. Patients with a history of active peptic ulcer disease should avoid using aspirin, which can cause gastric mucosal irritation and bleeding. Aspirin can cause serious gastrointestinal (GI) adverse reactions including bleeding, perforation, and obstruction of the stomach, small intestine, or large intestine, which can be fatal. Aspirin-associated serious GI adverse reactions can occur anywhere along the GI tract, at any time, with or without warning symptoms. Patients at higher risk of aspirin-associated serious upper GI adverse reactions include patients with a history of aspirin-associated GI bleeding from ulcers (complicated ulcers), a history of aspirin-associated ulcers (uncomplicated ulcers), geriatric patients, patients with poor baseline health status, patients taking higher doses of aspirin, and patients taking concomitant anticoagulants, NSAIDs, and/or large amounts of alcohol. To minimize the risk for aspirin-associated GI serious adverse reactions, the lowest effective aspirin dose should be used for the shortest possible duration. Increased Risk of Seizures in Patients with Seizure Disorders The codeine in Carisoprodol, Aspirin, and Codeine Phosphate Tablets may increase the frequency of seizures in patients with seizure disorders, and may increase the risk of seizures occurring in other clinical settings associated with seizures. Monitor patients with a history of seizure disorders for worsened seizure control during Carisoprodol, Aspirin, and Codeine Phosphate Tablets therapy. There have been post-marketing reports of seizures in patients who received carisoprodol. Most of these cases have occurred in the setting of multiple drug overdoses (including drugs of abuse, illegal drugs, and alcohol) (see OVERDOSAGE ). Withdrawal Avoid the use of mixed agonist/antagonist (e.g., pentazocine, nalbuphine, and butorphanol) or partial agonist (e.g., buprenorphine) analgesics in patients who are receiving a full opioid agonist analgesic, including Carisoprodol, Aspirin, and Codeine Phosphate Tablets. In these patients, mixed agonist/antagonist and partial agonist analgesics may reduce the analgesic effect and/or precipitate withdrawal symptoms. When discontinuing Carisoprodol, Aspirin, and Codeine Phosphate Tablets in a physicallydependent patient, gradually taper the dosage (see DOSAGE AND ADMINISTRATION ). Do not abruptly discontinue Carisoprodol, Aspirin, and Codeine Phosphate Tablets in these patients (see DRUG ABUSE AND DEPENDENCE ). Risks of Driving and Operating Machinery Carisoprodol, Aspirin, and Codeine Phosphate Tablets may impair the mental or physical abilities needed to perform potentially hazardous activities such as driving a car or operating machinery. Warn patients not to drive or operate dangerous machinery unless they are tolerant to the effects of Carisoprodol, Aspirin, and Codeine Phosphate Tablets and know how they will react to the medication. Coagulation Abnoramlities and Bleeding Risks Even low doses of aspirin can inhibit platelet function leading to an increase in bleeding time. This can adversely affect patients with inherited (i.e. hemophilia) or acquired (i.e. liver disease or vitamin K deficiency) bleeding disorders. Aspirin is contraindicated in patients with hemophilia. Aspirin administered pre-operatively may prolong the bleeding time. Patients who consume three or more alcoholic drinks every day should be counseled about the bleeding risks involved with chronic, heavy alcohol use while taking aspirin. Rey s Syndrome Aspirin should not be used in children or teenagers for viral infections, with or without fever, because of the risk of Reye syndrome with concomitant use of aspirin in certain viral illnesses. Allergy Aspirin is contraindicated in patients with known allergy to nonsteroidal anti-inflammatory drug products (NSAIDs) and in patients with the syndrome of asthma, rhinitis, and nasal polyps. Aspirin may cause severe urticaria, angioedema, or bronchospasm (asthma). Precautions Information for Patients Patients should be advised to contact their health care provider if they experience any adverse reactions to Carisoprodol, Aspirin and Codeine Phosphate Tablets. Advise the patient to read the FDA-approved patient labeling (Medication Guide). Addiction, Abuse, and Misuse Inform patients that the use of Carisoprodol, Aspirin, and Codeine Phosphate Tablets, even when taken as recommended, can result in addiction, abuse, and misuse, which can lead to overdose and death (see WARNINGS ). Instruct patients not to share Carisoprodol, Aspirin, and Codeine Phosphate Tablets with others and to take steps to protect Carisoprodol, Aspirin, and Codeine Phosphate Tablets from theft or misuse. Life-Threatening Respiratory Depression Inform patients of the risk of life-threatening respiratory depression, including information that the risk is greatest when starting Carisoprodol, Aspirin, and Codeine Phosphate Tablets or when the dosage is increased, and that it can occur even at recommended dosages (see WARNINGS ). Advise patients how to recognize respiratory depression and to seek medical attention if breathing difficulties develop. Accidental Ingestation Inform patients that accidental ingestion, especially by children, may result in respiratory depression or death. Instruct patients to take steps to store Carisoprodol, Aspirin, and Codeine Phosphate Tablets securely and to properly dispose of unused Carisoprodol, Aspirin, and Codeine Phosphate Tablets in accordance with the local state guidelines and/or regulations. Ultra-Rapid Metabolism of Codeine and Other Risk Factors for Life-threatening Respiratory Depression in Children Advise caregivers that Carisoprodol, Aspirin and Codeine Phosphate Tablets is contraindicated in all children younger than 12 years of age and in children younger than 18 years of age following tonsillectomy and/or adenoidectomy. Advise caregivers of children ages 12 to18 years of age receiving Carisoprodol, Aspirin, and Codeine Phosphate Tablets to monitor for signs of respiratory depression (see WARNINGS ). Interactions with Benzodiazepines and Other CNS Depressants Inform patients and caregivers that potentially fatal additive effects may occur if Carisoprodol, Aspirin, and Codeine Phosphate Tablets is used with benzodiazepines or other CNS depressants, including alcohol, and not to use these concomitantly unless supervised by a health care provider (see WARNINGS, PRECAUTIONS; Drug Interactions ). Serotonin Syndrome Inform patients that opioids could cause a rare but potentially life-threatening condition resulting from concomitant administration of serotonergic drugs. Warn patients of the symptoms of serotonin syndrome and to seek medical attention right away if symptoms develop. Instruct patients to inform their healthcare providers if they are taking, or plan to take serotonergic medications. (see PRECAUTIONS; Drug Interactions ). MAOI Interaction Inform patients not to take Carisoprodol, Aspirin, and Codeine Phosphate Tablets while using any drugs that inhibit monoamine oxidase. Patients should not start MAOIs while taking Carisoprodol, Aspirin, and Codeine Phosphate Tablets (see PRECAUTIONS; Drug Interactions ). Adrenal Insufficiency Inform patients that opioids could cause adrenal insufficiency, a potentially life-threatening condition. Adrenal insufficiency may present with non-specific symptoms and signs such as nausea, vomiting, anorexia, fatigue, weakness, dizziness, and low blood pressure. Advise patients to seek medical attention if they experience a constellation of these symptoms (see WARNINGS ). Important Administration Instructions Instruct patients how to properly take Carisoprodol, Aspirin, and Codeine Phosphate Tablets. (see DOSAGE AND ADMINISTRATION ). Patients should take the drug only for as long as it is prescribed, in the amounts prescribed, and no more frequently than prescribed. Hypotension Inform patients that Carisoprodol, Aspirin, and Codeine Phosphate Tablets may cause orthostatic hypotension and syncope. Instruct patients how to recognize symptoms of low blood pressure and how to reduce the risk of serious consequences should hypotension occur (e.g., sit or lie down, carefully rise from a sitting or lying position) (see WARNINGS ). Anaphylaxis Inform patients that anaphylaxis has been reported with ingredients contained in Carisoprodol, Aspirin, and Codeine Phosphate Tablets. Advise patients how to recognize such a reaction and when to seek medical attention (see CONTRAINDICATIONS , ADVERSE REACTIONS ). Aspirin Allergy: Patients should be informed that Carisoprodol, Aspirin, and Codeine Phosphate Tablets contains aspirin and should not be taken by patients with an aspirin or NSAIDs allergy (see WARNINGS ). Pregnancy Neonatal Opioid Withdrawal Syndrome: Inform female patients of reproducti searching for
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