Vicodin Hp (hydrocodone bitartrate/acetaminophen)

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Last reviewed · Source: First Databank (FDB) drug data

Overview

Hydrocodone and acetaminophen (hydrocodone/acetaminophen) is a fixed combination containing hydrocodone (an opiate agonist) and acetaminophen (a non-opioid, non-salicylate analgesic).

Acetaminophen is a synthetic nonopiate derivative of p-aminophenol that produces analgesia and antipyresis.

Hydrocodone bitartrate is a phenanthrene-derivative opioid agonist.

Hydrocodone bitartrate is a phenanthrene-derivative opiate agonist antitussive and analgesic agent.

Acetaminophen is a non-salicylate antipyretic and non-opioid analgesic agent. Acetaminophen produces analgesia and antipyresis in human and animal studies. Although the precise mechanism by which acetaminophen exerts its analgesic and antipyretic properties is not known, its primary activity is thought to occur centrally.

Individual doses of up to 3 grams and repeated doses of 1 gram of acetaminophen every 6 hours for 48 hours have not been shown to significantly impact platelet aggregation. Acetaminophen also does not have any immediate or delayed effects on small-vessel hemostasis. In patients with hemophilia treated with acetaminophen, there were no significant effects on bleeding time compared to healthy patients after multiple doses.

Following IV administration of single 500-mg, 650-mg, and 1-g doses of acetaminophen in adults, the pharmacokinetics are proportional to the dose administered. The peak plasma concentration of acetaminophen occurs at the end of the 15-minute IV infusion and is up to 70% higher than peak concentrations observed following oral administration of the same dose; however, systemic exposure to acetaminophen is similar following IV or oral administration. Following IV administration of a single dose of 15 mg/kg in pediatric patients or 1 g in adults, systemic exposure to acetaminophen is similar.

Acetaminophen plasma concentrations in neonates >32 weeks gestational age at birth receiving dosages of 12.5 mg/kg IV are similar to those in infants, children, and adolescents receiving dosages of 15 mg/kg IV, and adults receiving 1 g IV. Acetaminophen is widely distributed into most body tissues except fat. Acetaminophen is distributed into human milk in small quantities following oral administration.

About 10-25% of acetaminophen in blood is bound to plasma proteins.

Acetaminophen primarily undergoes metabolism via first-order kinetics that involves 3 separate pathways. These pathways include glucuronide conjugation, sulfate conjugation, and oxidation via the cytochrome P-450 (CYP) enzyme pathways, primarily CYP isoenzyme 2E1, to form a reactive intermediate metabolite N-acetyl-p-benzoquinone imine (NAPQI). At therapeutic doses, NAPQI is rapidly conjugated with glutathione and further metabolized to form cysteine and mercapturic acid conjugates.

Metabolites of acetaminophen are primarily excreted in the urine. Less than 5% of a dose of acetaminophen is excreted in urine as free acetaminophen and >90% of the dose is excreted within 24 hours after ingestion. Acetaminophen has been reported to have a plasma half-life of 2.4-3 hours in children, adolescents, and adults.

Hydrocodone bitartrate is a phenanthrene-derivative opioid agonist that is used as an analgesic and antitussive agent. Hydrocodone is a full opioid agonist with relative selectivity for the mu-opioid receptor, although it can interact with other opioid receptors at higher doses. The principal therapeutic action of hydrocodone is analgesia; however, the precise mechanism of analgesic action is unknown.

Specific CNS opioid receptors for endogenous compounds with opioid-like activity have been identified throughout the brain and spinal cord and are thought to play a role in the analgesic effects of this drug. Like all full opioid agonists, there is no ceiling effect for analgesia with hydrocodone. Clinically, dosage is titrated to provide adequate analgesia and may be limited by adverse reactions, including respiratory and CNS depression.

Hydrocodone produces respiratory depression by direct action on brainstem respiratory centers. Other opioid-induced effects may include a reduction in biliary and pancreatic secretions, spasm of sphincter of Oddi, and transient elevations in serum amylase. Cardiovascular effects of the drug include peripheral vasodilation, which may result in orthostatic hypotension or syncope, inhibition of adrenocorticotropic hormone (ACTH), cortisol, and luteinizing hormone (LH) secretion, and stimulation of prolactin, growth hormone, and pancreatic secretion of insulin and glucagon.

Hydrocodone is believed to act centrally on the cough center, which may contribute to its therapeutic effects in the management of cough; however, the exact mechanism is not known.

Overall systemic exposure or bioavailability of hydrocodone bitartrate following administration as extended-release capsules or tablets is similar to that observed following administration of immediate-release fixed-combination preparations containing the drug in the same or similar dosage; however, peak plasma concentrations of the drug are lower with the extended-release formulations. Peak plasma concentrations of hydrocodone are attained approximately 5 hours after administration as extended-release capsules, and 6-30 hours after administration as extended-release tablets. After administration of the extended-release capsules for 7 days, AUC and peak concentrations of hydrocodone are approximately 2-fold higher than values attained on the first day of administration.

Administration of the extended-release capsules with food does not substantially affect the extent of absorption, although peak plasma hydrocodone concentrations were increased by 27% following administration of a 20-mg dose of the extended-release capsules with a high-fat meal.

After single-dose administration of hydrocodone bitartrate extended-release tablets, peak concentrations and AUC of the drug increased linearly and in a slightly more than dose-proportional manner over the dose range of 20-120 mg. With once-daily dosing, peak plasma concentrations and AUC were 1.1- and 1.3-fold higher at steady state. Higher doses (80 or 120 mg versus 30 mg) produced larger fluctuations in peak-to-trough plasma concentrations of the drug.

Although administration of the 120-mg extended-release tablets with a high-fat meal increased peak plasma concentrations by 54% compared with administration in the fasted state, AUC was increased by only 20% and the manufacturer states that the extended-release tablets may be administered without regard to meals.

Hydrocodone is metabolized by N-demethylation, O-demethylation, and 6-keto reduction to the corresponding 6-alpha- and 6-beta-hydroxy metabolites. Hydrocodone is metabolized principally by cytochrome P-450 (CYP) isoenzyme 3A4 to form norhydrocodone (N-demethylation) and to a lesser extent by CYP2D6 to form hydromorphone (O-demethylation). Hydromorphone accounts for less than 3% of the circulating parent drug, but may contribute to the total analgesic effect of hydrocodone.

Hydrocodone and its metabolites are eliminated mainly in urine; only about 6.5% of an administered dose is excreted as unchanged drug. About 99% of an administered dose is eliminated within 72 hours. The mean plasma half-life is approximately 7-9 hours after oral administration as extended-release capsules or tablets.

Hydrocodone is about 36% bound to plasma proteins.

USES: This combination medication is used to relieve moderate to severe pain. It contains an opioid pain reliever (hydrocodone) and a non-opioid pain reliever (acetaminophen). Hydrocodone works in the brain to change how your body feels and responds to pain.

Acetaminophen can also reduce a fever.

Generic name: hydrocodone bitartrate/acetaminophen
Pronunciation: (HYE-droe-KOE-done/a-SEET-a-MIN-oh-fen)

Reference product & biosimilars

No reference, biosimilar or interchangeable associated with this drug.

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Indications

The following indications are listed for Vicodin Hp:

  • Pain

Dosing

It isessential that the manufacturer's labeling be consulted for more detailed information on dosage and administration of this drug. Dosage summary:

To minimize risk of overdosage, recommended age-appropriate daily dosages of acetaminophen should not be exceeded.

Dosage of hydrocodone bitartrate and hydrocodone polistirex is expressed in terms of hydrocodone bitartrate.

Drug interactions

Concomitant use of opiate agonists and benzodiazepines or other CNS depressants (e.g., anxiolytics, sedatives, hypnotics, tranquilizers, muscle relaxants, general anesthetics, antipsychotics, other opiate agonists, alcohol) may result in profound sedation, respiratory depression, coma, and death. Opiate agonist antitussives should be avoided in patients taking benzodiazepines, other CNS depressants, or alcohol. Concurrent use of anticholinergic agents with hydrocodone may produce paralytic ileus. Concomitant use of opiate agonists with serotonergic drugs can cause serotonin syndrome. (See Drug Interactions in the Opiate Agonists General Statement 28:08.08.)

Contraindications

*Significant respiratory depression.

*Acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative equipment.

*Known or suspected GI obstruction, including paralytic ileus.

*Hypersensitivity to hydrocodone or acetaminophen (e.g., anaphylaxis).

*Known hypersensitivity to acetaminophen or any ingredient in the formulation.

*Severe hepatic impairment or severe active liver disease.

*Significant respiratory depression.

*Acute or severe bronchial asthma in an unmonitored setting or in the absence of resuscitative equipment.

*Known or suspected GI obstruction, including paralytic ileus.

*Hypersensitivity to hydrocodone or any ingredient in the formulations.

Adverse reactions

The most frequently reported adverse reactions are light-headedness, dizziness, sedation, nausea and vomiting.

The most common adverse effects reported in clinical trials in >=5% of patients receiving IV acetaminophen were nausea, vomiting, headache, and insomnia in adults and nausea, vomiting, constipation, and pruritus in pediatric patients.

Common adverse effects associated with oral or rectal administration of acetaminophen include skin rash, hypersensitivity reactions, nephrotoxicity, and hematologic abnormalities (e.g., anemia, leukopenia, neutropenia, and pancytopenia).

The most common adverse effects reported in patients receiving hydrocodone bitartrate extended-release tablets are constipation, nausea, vomiting, fatigue, upper respiratory tract infection, dizziness, headache, and somnolence; common adverse effects in patients receiving hydrocodone bitartrate extended-release capsules include constipation, nausea, somnolence, fatigue, headache, dizziness, dry mouth, vomiting, pruritus, abdominal pain, peripheral edema, upper respiratory tract infection, muscle spasms, urinary tract infection, back pain, and tremor.

Precautions

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ICD codes

No ICD codes are available for this drug.

Formulary status

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Last reviewed · Source: First Databank (FDB) drug data