Propoxyphene And Acetaminophen
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Questions & Answers
Side Effects & Adverse Reactions
There have been numerous cases of accidental and intentional overdose with propoxyphene products either alone or in combination with other CNS depressants, including alcohol. Fatalities within the first hour of overdosage are not uncommon. Many of the propoxyphene-related deaths have occurred in patients with previous histories of emotional disturbances or suicidal ideation/attempts and/or concomitant administration of sedatives, tranquilizers, muscle relaxants, antidepressants, or other CNS-depressant drugs. Do not prescribe propoxyphene for patients who are suicidal or have a history of suicidal ideation.
Respiratory depression is the chief hazard from all opioid agonist preparations. Respiratory depression occurs most frequently in elderly or debilitated patients, usually following large initial doses in non-tolerant patients, or when opioids are given in conjunction with other agents that depress respiration. Propoxyphene napsylate and acetaminophen should be used with extreme caution in patients with significant chronic obstructive pulmonary disease or cor pulmonale, and in patients having substantially decreased respiratory reserve, hypoxia, hypercapnia, or pre-existing respiratory depression. In such patients, even usual therapeutic doses of propoxyphene napsylate and acetaminophen may decrease respiratory drive to the point of apnea. In these patients alternative non-opioid analgesics should be considered, and opioids should be employed only under careful medical supervision at the lowest effective dose.
Propoxyphene napsylate and acetaminophen, like all opioid analgesics, may cause severe hypotension in an individual whose ability to maintain blood pressure has been compromised by a depleted blood volume, or after concurrent administration with drugs such as phenothiazines or other agents which compromise vasomotor tone. Propoxyphene napsylate and acetaminophen may produce orthostatic hypotension in ambulatory patients. Propoxyphene napsylate and acetaminophen, like all opioid analgesics, should be administered with caution to patients in circulatory shock, since vasodilatation produced by the drug may further reduce cardiac output and blood pressure.
The respiratory depressant effects of narcotics and their capacity to elevate cerebrospinal fluid pressure may be markedly exaggerated in the presence of head injury, other intracranial lesions or a pre-existing increase in intracranial pressure. Furthermore, narcotics produce adverse reactions which may obscure the clinical course of patients with head injuries.
The concomitant use of propoxyphene and CNS depressants, including alcohol, can result in potentially serious adverse events including death. Because of its added depressant effects, propoxyphene should be prescribed with caution for those patients whose medical condition requires the concomitant administration of sedatives, tranquilizers, muscle relaxants, antidepressants, or other CNS-depressant drugs.
Propoxyphene may impair the mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a car or operating machinery. The patient should be cautioned accordingly.
Due to the potential for acetaminophen hepatotoxicity at doses higher than the recommended dose, propoxyphene napsylate and acetaminophen should not be used concomitantly with other acetaminophen-containing products.
Hepatotoxicity and severe hepatic failure occurred in chronic alcoholics following therapeutic doses of acetaminophen. Patients should be cautioned about the concomitant use of propoxyphene products and alcohol because of potentially serious CNS-additive effects of these agents that can lead to death.
Respiratory depression is the chief hazard from all opioid agonist preparations. Respiratory depression occurs most frequently in elderly or debilitated patients, usually following large initial doses in non-tolerant patients, or when opioids are given in conjunction with other agents that depress respiration. Propoxyphene napsylate and acetaminophen should be used with extreme caution in patients with significant chronic obstructive pulmonary disease or cor pulmonale, and in patients having substantially decreased respiratory reserve, hypoxia, hypercapnia, or pre-existing respiratory depression. In such patients, even usual therapeutic doses of propoxyphene napsylate and acetaminophen may decrease respiratory drive to the point of apnea. In these patients alternative non-opioid analgesics should be considered, and opioids should be employed only under careful medical supervision at the lowest effective dose.
Hypotensive EffectPropoxyphene napsylate and acetaminophen, like all opioid analgesics, may cause severe hypotension in an individual whose ability to maintain blood pressure has been compromised by a depleted blood volume, or after concurrent administration with drugs such as phenothiazines or other agents which compromise vasomotor tone. Propoxyphene napsylate and acetaminophen may produce orthostatic hypotension in ambulatory patients. Propoxyphene napsylate and acetaminophen, like all opioid analgesics, should be administered with caution to patients in circulatory shock, since vasodilatation produced by the drug may further reduce cardiac output and blood pressure.
Head Injury and Increased Intracranial PressureThe respiratory depressant effects of narcotics and their capacity to elevate cerebrospinal fluid pressure may be markedly exaggerated in the presence of head injury, other intracranial lesions or a pre-existing increase in intracranial pressure. Furthermore, narcotics produce adverse reactions which may obscure the clinical course of patients with head injuries.
Usage in Ambulatory PatientsPropoxyphene may impair the mental and/or physical abilities required for the performance of potentially hazardous tasks, such as driving a car or operating machinery. The patient should be cautioned accordingly.
Use with Other Acetaminophen-Containing AgentsDue to the potential for acetaminophen hepatotoxicity at doses higher than the recommended dose, propoxyphene napsylate and acetaminophen should not be used concomitantly with other acetaminophen-containing products.
Use with AlcoholHepatotoxicity and severe hepatic failure occurred in chronic alcoholics following therapeutic doses of acetaminophen. Patients should be cautioned about the concomitant use of propoxyphene products and alcohol because of potentially serious CNS-additive effects of these agents that can lead to death.
Legal Issues
There is currently no legal information available for this drug.
FDA Safety Alerts
There are currently no FDA safety alerts available for this drug.
Manufacturer Warnings
There is currently no manufacturer warning information available for this drug.
FDA Labeling Changes
There are currently no FDA labeling changes available for this drug.
Uses
Propoxyphene napsylate and acetaminophen tablets, USP are indicated for the relief of mild to moderate pain.
History
There is currently no drug history available for this drug.
Other Information
Propoxyphene Napsylate, USP is an odorless, white crystalline powder with a bitter taste. It is very slightly soluble in water and soluble in methanol, ethanol, chloroform, and acetone. Chemically, it is (αS,1R)-α-[2-(Dimethylamino)-1-methylethyl]-α-phenylphenethyl propionate compound with 2-napthalenesulfonic acid (1:1) monohydrate, which can be represented by the accompanying structural formula.
Propoxyphene napsylate differs from propoxyphene hydrochloride in that it allows more stable liquid dosage forms and tablet formulations. Because of differences in molecular weight, a dose of 100 mg (176.8 μmol) of propoxyphene napsylate is required to supply an amount of propoxyphene equivalent to that present in 65 mg (172.9 μmol) of propoxyphene hydrochloride.
Acetaminophen, 4'-hydroxyacetanilide, is a non-opiate, non-salicylate analgesic and antipyretic which occurs as a white, odorless, crystalline powder, possessing a slightly bitter taste. The molecular formula for acetaminophen is C8H9NO2 and the molecular weight is 151.16. It may be represented by the following structural formula.
Propoxyphene Napsylate and Acetaminophen Tablets, USP 50 mg/325 mg
Each tablet contains:
Propoxyphene Napsylate ............................50 mg (88.4 μmol)
Acetaminophen .........................................325 mg (2150 μmol)
In addition each tablet contains the following inactive ingredients: carnauba wax, D&C Yellow #10 Aluminum Lake, FD&C Red #40 Aluminum Lake, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, polysorbate 80, sodium starch glycolate and titanium dioxide.
Propoxyphene Napsylate and Acetaminophen Tablets, USP 100 mg/650 mg
Each tablet contains:
Propoxyphene Napsylate ...........................100 mg (176.8 μmol)
Acetaminophen ..........................................650 mg (4300 μmol)
In addition each tablet contains the following inactive ingredients: carnauba wax, hypromellose, lactose monohydrate, magnesium stearate, polyethylene glycol, polysorbate 80, sodium starch glycolate and titanium dioxide. The orange tablets also contain D&C Yellow #10 Aluminum Lake and FD&C Red #40 Aluminum Lake. The pink tablets also contain FD&C Red #40 Aluminum Lake.
Sources
Propoxyphene And Acetaminophen Manufacturers
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Altura Pharmaceuticals, Inc.
![Propoxyphene And Acetaminophen (Propoxyphene Napsylate And Acetaminophen) Tablet, Film Coated [Altura Pharmaceuticals, Inc.]](/wp-content/themes/bootstrap/assets/img/loading2.gif)
Propoxyphene And Acetaminophen | Altura Pharmaceuticals, Inc.
Propoxyphene napsylate and acetaminophen tablets are intended for the management of mild to moderate pain. The dose should be individually adjusted according to severity of pain, patient response and patient size.
Propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg
The usual dosage is one tablet every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg is 6 tablets per day. Do not exceed the maximum daily dose.Propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg
The usual dosage is two tablets every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg is 12 tablets per day. Do not exceed the maximum daily dose.Patients receiving propoxyphene and any CYP3A4 inhibitor should be carefully monitored for an extended period of time and dosage adjustments should be made if warranted.
Consideration should be given to a reduced total daily dosage in elderly patients and in patients with hepatic or renal impairment.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
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Keltman Pharmaceuticals Inc.
Propoxyphene And Acetaminophen | Keltman Pharmaceuticals Inc.
Propoxyphene napsylate and acetaminophen tablets are intended for the management of mild to moderate pain. The dose should be individually adjusted according to severity of pain, patient response and patient size.
Propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg
The usual dosage is one tablet every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg is 6 tablets per day. Do not exceed the maximum daily dose.Propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg
The usual dosage is two tablets every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg is 12 tablets per day. Do not exceed the maximum daily dose.Patients receiving propoxyphene and any CYP3A4 inhibitor should be carefully monitored for an extended period of time and dosage adjustments should be made if warranted.
Consideration should be given to a reduced total daily dosage in elderly patients and in patients with hepatic or renal impairment.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
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Pd-rx Pharmaceuticals, Inc.
Propoxyphene And Acetaminophen | Pd-rx Pharmaceuticals, Inc.
Propoxyphene napsylate and acetaminophen tablets are intended for the management of mild to moderate pain. The dose should be individually adjusted according to severity of pain, patient response and patient size.
Propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg
The usual dosage is one tablet every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 100 mg/650 mg is 6 tablets per day. Do not exceed the maximum daily dose.Propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg
The usual dosage is two tablets every 4 hours orally as needed for pain. The maximum dose of propoxyphene napsylate and acetaminophen tablets 50 mg/325 mg is 12 tablets per day. Do not exceed the maximum daily dose.Patients receiving propoxyphene and any CYP3A4 inhibitor should be carefully monitored for an extended period of time and dosage adjustments should be made if warranted.
Consideration should be given to a reduced total daily dosage in elderly patients and in patients with hepatic or renal impairment.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
Cessation of TherapyFor patients who used propoxyphene napsylate and acetaminophen on a regular basis for a period of time, when therapy with propoxyphene napsylate and acetaminophen is no longer needed for the treatment of their pain, it may be useful to gradually discontinue the propoxyphene napsylate and acetaminophen over time to prevent the development of an opioid abstinence syndrome (narcotic withdrawal). In general, therapy can be decreased by 25% to 50% per day with careful monitoring for signs and symptoms of withdrawal (see DRUG ABUSE AND DEPENDENCE for description of the signs and symptoms of withdrawal). If the patient develops these signs or symptoms, the dose should be raised to the previous level and titrated down more slowly, either by increasing the interval between decreases, decreasing the amount of change in dose, or both.
![Propoxyphene And Acetaminophen (Propoxyphene Napsylate And Acetaminophen) Tablet, Film Coated [Keltman Pharmaceuticals Inc.]](http://dailymed.nlm.nih.gov/dailymed/image.cfm?setid=6ce33ae0-8f55-4d74-9c1e-003be1001596&name=DarvocetN100.jpg)
![Propoxyphene And Acetaminophen (Propoxyphene Napsylate And Acetaminophen) Tablet, Film Coated [Pd-rx Pharmaceuticals, Inc.]](http://dailymed.nlm.nih.gov/dailymed/image.cfm?setid=2e6ea237-c085-4f22-bfe1-b0c7c116aa67&name=propoxy-3.jpg)
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