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| Medication |
Strength |
Quantity |
| Robaxacet extra strength |
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40 |
Robaxacet Extra Strength
Methocarbamol--Acetaminophen
Robaxacet Extra Strength - Robaxacet Extra Strength Side Effects - Robaxacet Extra Strength Information
Pharmacology: This product provides a dual approach to the management of discomforts associated with musculoskeletal disorders.
The mechanism of action of methocarbamol has not been established, but may be due to general CNS depression. It has no direct action on the contractile mechanism of striated muscle, the motor end plate or the nerve fiber. Acetaminophen is a non-opiate, non-salicylate analgesic and antipyretic.
Methocarbamol is metabolized to yield a dealkylated and a hydroxylated product. These two metabolites are found primarily as glucuronide and sulfate conjugates. The half-life of methocarbamol and its metabolites is about 2 hours. Animal studies reveal that methocarbamol crosses the placental barrier and the blood-brain barrier. Acetaminophen is conjugated in the liver to form glucuronide and sulfate conjugates. Its plasma half-life has been reported to be from 1 to 2 hours.
Indications: Pain due to or associated with skeletal muscle spasm such as acute and chronic back strains and sprains, whiplash and other traumatic injuries, myositis, pain and spasm associated with arthritis, torticollis, joint strains and sprains, bursitis, low back pain due to ill-defined causes.
Contraindications: Hypersensitivity to methocarbamol or acetaminophen.
Warnings: Do not exceed recommended dosage as severe liver damage due to acetaminophen toxicity may occur. Avoid alcohol.
Precautions: Occupational Hazards: Until the potential for producing drowsiness and dizziness has been determined, the patient should be cautioned against the operation of motor vehicles or machinery.
Since methocarbamol may possess a general CNS depressant effect, patients receiving Robaxacet should be cautioned about combined effects with alcohol and other CNS depressants.
Drug Interactions : Methocarbamol may cause a color interference in certain screening tests for 5-hydroxyindoleacetic acid (5-HIAA) and vanillylmandelic acid (VMA).
Pregnancy: There are no adequate and well-controlled studies of Robaxacet in pregnant women. This product should be used during pregnancy only when, in the judgment of the physician, the potential benefits outweigh the potential hazards.
Lactation: It is not known whether methocarbamol or its metabolites are secreted in human milk; there is some indication that small quantities of acetaminophen are secreted.
Children: Safety and effectiveness in children 12 years of age and younger have not been established.
Adverse Effects: The most common complaints to methocarbamol are drowsiness, nausea and dizziness or lightheadedness (seen in approximately 4 to 5% of patients). The following reactions have been associated with the drug, some of them rarely; in some instances, causal relationships have not been established: headache, nasal congestion, blurred vision, rash, pruritus and urticaria.
Adverse reactions that have been associated with the use of acetaminophen include: nausea, vomiting or diarrhea. Rarely, hypersensitivity reactions have been reported, as manifested by thrombocytopenic purpura, hemolytic anemia and agranulocytosis.
Gastrointestinal discomfort may be minimized by taking the dose with food.
Overdose: Symptoms: Methocarbamol: No deaths or major toxicity have been reported from overdosage with methocarbamol, administered parenterally or orally. One adult survived the deliberate ingestion of 22 to 30 g of methocarbamol without serious toxicity. Another survived 30 to 50 g. The principal symptom was drowsiness in both cases. However, 3 deaths have been reported when methocarbamol was combined with alcohol and other drugs.
Acetaminophen: Acetaminophen in massive overdosage may cause hepatic toxicity in some patients.
In adults, hepatic toxicity has rarely been reported with acute overdoses of less than 5 g. Importantly, young children seem to be more resistant than adults to the hepatotoxic effect of an acetaminophen overdose. Despite this, the measures outlined below should be initiated in any adult or child suspected of having ingested an acetaminophen overdose.
Early symptoms following a potentially hepatotoxic overdose may include: nausea, vomiting, diaphoresis and general malaise. Clinical and laboratory evidence of hepatic toxicity may not be apparent until 48 to 72 hours postingestion.
Treatment: Methocarbamol: Supportive measures include maintenance of an adequate airway, monitoring urinary output and vital signs and the administration of i.v. fluids, if necessary. There is no experience with forced diuresis or with dialysis in the treatment of methocarbamol overdose. Likewise, the usefulness of hemodialysis in managing methocarbamol overdose is unknown.
Acetaminophen: The stomach should be emptied promptly by lavage or by induction of emesis with syrup of ipecac. Patients' estimates of the quantity of a drug ingested are notoriously unreliable. Therefore, if an acetaminophen overdose is suspected, a serum acetaminophen assay should be obtained as early as possible, but no sooner than 4 hours following ingestion. Liver function studies should be obtained initially and repeated at 24-hour intervals.
The antidote, N-acetylcysteine, should be administered as early as possible, and within 16 hours of the overdose ingestion for optimal results. Following recovery, there are no residual, structural or functional hepatic abnormalities.
Dosage: Robaxacet Tablets/Caplets: Adults and Children over 12 years: 2 caplets/tablets 4 times daily. Three caplets/tablets 4 times daily may be used in severe conditions for 1 to 3 days. These dosage recommendations provide 3.2 and 4.8 g, respectively, methocarbamol and 2.6 and 3.9 g, respectively, acetaminophen/day.
Robaxacet Extra Strength: Adults and Children over 12 years: 2 caplets 4 times daily. This recommended dosage provides 3.2 g methocarbamol and 4 g acetaminophen/day.
Supplied: Robaxacet: Caplets: Each green and white caplet, green layer scored and white layer engraved WR, contains: methocarbamol 400 mg and acetaminophen 325 mg. Nonmedicinal ingredients: cellulose, cornstarch, crospovidone, D&C Yellow No. 10, FD&C Blue No. 1, magnesium stearate, polyethylene glycol, povidone, pregelatinized starch, sodium lauryl sulfate, sodium starch glycolate and stearic acid. Energy: <1 kJ (<1 kcal). Sodium: <1 mmol (0.82 mg). Bottles of 40. Boxes of 18. Store at room temperature (15 to 30°C).
Tablets: Each green and white tablet, green layer scored and white layer engraved WR, contains: methocarbamol 400 mg and acetaminophen 325 mg. Nonmedicinal ingredients: cornstarch, crospovidone, D&C Yellow No. 10, FD&C Blue No. 1, magnesium stearate, povidone, pregelatinized starch, sodium lauryl sulfate, sodium starch glycolate and stearic acid. Energy: <1 kJ (<1 kcal). Sodium: <1 mmol (0.82 mg). Bottles of 40 and 500. Boxes of 18. Store at room temperature (15 to 30°C).
Robaxacet Extra Strength: Each green and white caplet, green layer scored and engraved EX, and white layer engraved W-R, contains: methocarbamol 400 mg and acetaminophen 500 mg. Nonmedicinal ingredients: cellulose, cornstarch, crospovidone, D&C Yellow No. 10, FD&C Blue No. 1, magnesium stearate, polyethylene glycol, povidone, pregelatinized starch, sodium lauryl sulfate, sodium starch glycolate and stearic acid. Energy: <1 kJ (<1 kcal). Sodium: <1 mmol (0.46 mg). Bottles of 40. Boxes of 18. Store at room temperature (15 to 30°C).
IMPORTANT NOTE: THE FOLLOWING INFORMATION IS INTENDED TO SUPPLEMENT, NOT SUBSTITUTE FOR, THE EXPERTISE AND JUDGMENT OF YOUR PHYSICIAN, PHARMACIST OR OTHER HEALTHCARE PROFESSIONAL. IT SHOULD NOT BE CONSTRUED TO INDICATE THAT USE OF THE DRUG IS SAFE, APPROPRIATE, OR EFFECTIVE FOR YOU. CONSULT YOUR HEALTHCARE PROFESSIONAL BEFORE USING THIS DRUG.
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