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To report SUSPECTED ADVERSE REACTIONS, contact Meda Pharmaceuticals Inc. at 1-800-526-3840 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
The following adverse reactions which have occurred with the administration of the individual products alone may also occur with the use of Soma Compound (carisoprodol and aspirin) . The following events have been reported during post-approval individual use of carisoprodol and aspirin. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Carisoprodol: The following events have been reported during post-approval use of carisoprodol. Because these reactions are reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.
Tachycardia, postural hypotension, and facial flushing (see OVERDOSAGE).
Central Nervous System
Aspirin: The most common adverse reactions associated with the use of aspirin have been gastrointestinal, including abdominal pain, anorexia, nausea, vomiting, gastritis, and occult bleeding (see WARNINGS, Serious Gastrointestinal Adverse Reactions and PRECAUTIONS, Gastrointestinal Adverse Reactions). Other adverse reactions associated with the use of aspirin include elevated liver enzymes, rash, pruritus, purpura, intracranial hemorrhage, interstitial nephritis, acute renal failure, and tinnitus. Tinnitus may be a symptom of high serum salicylate levels (see OVERDOSAGE).
Drug Abuse And Dependence
Carisoprodol is not a controlled substance (see WARNINGS).
Discontinuation of carisoprodol in animals or in humans after chronic administration can produce withdrawal signs, and there are published case reports of human carisoprodol dependence.
In vitro studies demonstrate that carisoprodol elicits barbiturate-like effects. Animal behavioral studies indicate that carisoprodol produces rewarding effects. Monkeys self administer carisoprodol. Drug discrimination studies using rats indicate that carisoprodol has positive reinforcing and discriminating effects similar to barbital, meprobamate, and chlordiazepoxide.
Read the Soma Compound (carisoprodol and aspirin) Side Effects Center for a complete guide to possible side effects
The sedative effects of carisoprodol and other CNS depressants (e.g., alcohol, benzodiazepines, opioids, tricyclic antidepressants) may be additive. Therefore, caution should be exercised with patients who take more than one of these CNS depressants simultaneously. Concomitant use of carisoprodol and meprobamate, a metabolite of carisoprodol, is not recommended (see WARNINGS, Sedation).
Carisoprodol is metabolized in the liver by CYP2C19 to form meprobamate (see CLINICAL PHARMACOLOGY). Coadministration of CYP2C19 inhibitors, such as omeprazole or fluvoxamine, with carisoprodol could result in increased exposure of carisoprodol and decreased exposure of meprobamate. Co-administration of CYP2C19 inducers, such as rifampin or St. John's Wort, with carisoprodol could result in decreased exposure of carisoprodol and increased exposure of meprobamate. Low dose aspirin also showed an induction effect on CYP2C19. The full pharmacological impact of these potential alterations of exposures in terms of either efficacy or safety of carisoprodol is unknown.
Clinically important interactions may occur when certain drugs or alcohol are administered concomitantly with aspirin.
Concomitant use of aspirin with ≥ 3 alcoholic drinks may increase the risk of GI bleeding (see WARNINGS, Serious Gastrointestinal Adverse Reactions).
Concomitant use of aspirin with anticoagulants (e.g., heparin, warfarin, clopidogrel) increases the risk of GI bleeding (see WARNINGS, Serious Gastrointestinal Adverse Reactions). Additionally, aspirin can displace warfarin from protein binding sites, leading to prolongation of the international normalized ratio (INR).
The concomitant administration of aspirin with angiotensin converting enzyme (ACE) inhibitors, angiotensin receptor blockers (ARBs), beta-blockers, and diuretics may diminish the hypotensive effects of these anti-hypertensive products due to aspirin's inhibition of renal prostaglandins, which may lead to decreased renal blood flow and increased sodium and fluid retention. Concomitant use of aspirin and acetazolamide can lead to high serum concentrations of acetazolamide due to competition at the renal tubule for secretion.
Concomitant administration of aspirin and corticosteriods may decrease salicylate plasma levels.
Aspirin may enhance the toxicity of methotrexate due to displacement of methotrexate from its plasma protein binding sites and/or reduction of the renal clearance of methotrexate.
Nonsteroidal anti-inflammatory drugs (NSAIDs)
The concurrent use of aspirin with selective and nonselective NSAIDs increases the risk of serious GI adverse reactions (see WARNINGS, Serious Gastrointestinal Adverse Reactions).
Oral Hypoglycemics Agents
Products that effect urinary pH
Ammonium chloride and other drugs that acidify the urine can elevate plasma salicylate concentrations. In contrast, antacids, by alkalinizing the urine, may decrease plasma salicylate concentrations.
Salicylates antagonize the uricosuric action of probenecid and sulfinpyrazone.
Last reviewed on RxList: 12/9/2009
This monograph has been modified to include the generic and brand name in many instances.
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