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Pronunciation |
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(kar
i soe PROE
dole) |
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U.S. Brand
Names |
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Soma® |
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Generic
Available |
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Yes |
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Synonyms |
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Carisoprodate; Isobamate |
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Pharmacological Index |
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Skeletal Muscle Relaxant |
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Use |
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Dental: Treatment of muscle spasm associated with acute temporomandibular
joint pain
Medical: Skeletal muscle relaxant |
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Pregnancy Risk
Factor |
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C |
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Contraindications |
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Acute intermittent porphyria, hypersensitivity to carisoprodol, meprobamate
or any component |
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Warnings/Precautions |
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Use with caution in renal and hepatic dysfunction |
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Adverse
Reactions |
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>10%: Central nervous system: Drowsiness
1% to 10%:
Cardiovascular: Tachycardia, tightness in chest, flushing of face, syncope
Central nervous system: Mental depression, allergic fever, dizziness,
lightheadedness, headache, paradoxical CNS stimulation
Dermatologic: Angioedema
Gastrointestinal: Nausea, vomiting, stomach cramps
Neuromuscular & skeletal: Trembling
Ocular: Burning eyes
Respiratory: Shortness of breath
Miscellaneous: Hiccups
<1%: Ataxia, rash, urticaria, erythema multiforme, aplastic anemia,
leukopenia, eosinophilia, blurred vision |
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Overdosage/Toxicology |
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Symptoms of overdose include CNS depression, stupor, coma, shock, respiratory
depression
Treatment is supportive following attempts to enhance drug elimination.
Hypotension should be treated with I.V. fluids and/or Trendelenburg positioning.
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Drug
Interactions |
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CYP2C19 enzyme substrate |
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Mechanism of
Action |
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Precise mechanism is not yet clear, but many effects have been ascribed to
its central depressant actions |
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Pharmacodynamics/Kinetics |
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Onset of action: Within 30 minutes
Duration: 4-6 hours
Distribution: Crosses the placenta; appears in high concentrations in breast
milk
Metabolism: By the liver
Half-life: 8 hours
Elimination: By the kidneys |
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Usual Dosage |
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Adults: Oral: 350 mg 3-4 times/day; take last dose at bedtime; compound: 1-2
tablets 4 times/day |
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Dietary
Considerations |
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Alcohol: Additive CNS effects, avoid use |
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Monitoring
Parameters |
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Look for relief of pain and/or muscle spasm and avoid excessive
drowsiness |
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Mental Health: Effects
on Mental Status |
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Drowsiness is common; may produce depression or paradoxical CNS
stimulation |
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Mental Health:
Effects on Psychiatric
Treatment |
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Rarely may cause leukopenia or aplastic anemia; use caution with clozapine
and carbamazepine; concurrent use with psychotropics may produce additive
sedation |
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Dental Health: Local
Anesthetic/Vasoconstrictor
Precautions |
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No information available to require special precautions |
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Dental Health:
Effects on Dental Treatment |
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No effects or complications reported |
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Patient
Information |
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Take exactly as directed with food. Do not increase dose or discontinue
without consulting prescriber. Do not use alcohol, prescriptive or OTC
antidepressants, sedatives, and pain medications without consulting prescriber.
You may experience drowsiness, dizziness, lightheadedness (avoid driving or
engaging in tasks requiring alertness until response to drug is known); nausea,
vomiting, or cramping (small, frequent meals, frequent mouth care, or sucking
hard candy may help); or postural hypotension (change position slowly when
rising from sitting or lying or when climbing stairs). Report excessive
drowsiness or mental agitation; palpitations, rapid heartbeat, or chest pain;
skin rash; muscle cramping or tremors; or respiratory difficulty.
Pregnancy/breast-feeding precautions: Inform prescriber if you are or intend
to be pregnant. Breast-feeding is not recommended. |
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Nursing
Implications |
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Raise bed rails; institute safety measures; assist with
ambulation |
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Dosage Forms |
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Tablet: 350 mg |
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Extemporaneous
Preparations |
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A suspension can be prepared by triturating 60 carisoprodol 350 mg tablets, a
small amount of water or glycerin, then mixing with a sufficient quantity of
cherry syrup to bring the final volume to 60 mL; when refrigerated, the
suspension is stable for 14 days; shake well before
administration |
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References |
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Adams HR, Kerzee T, and Morehead CD,
"Carisoprodol-Related Death in a Child," J Forensic Sci, 1975, 20:200-2.
Backer RC, Zumwalt R, McFeeley P, et al,
"Carisoprodol Concentrations From Different Anatomical Sites: Three Overdose Cases,"
J Anal Toxicol, 1990, 14(5):332-4.
Goldberg D, "Carisoprodol Toxicity," Milit Med, 1969, 34:597-601.
Luehr JG, Meyerle KA, and Larson EW,
"Mail-Order (Veterinary) Drug Dependence," JAMA, 1990, 263(5):657.
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