Rx Item-Bupap 50mg 300mg Tab 100 by Valeant Pharma

BUPAP- butalbital and acetaminophen tablet
ECR Pharmaceuticals Co., Inc.

WARNING

HEPATOTOXICITY

ACETAMINOPHEN HAS BEEN ASSOCIATED WITH CASES OF ACUTE LIVER FAILURE, AT TIMES RESULTING IN LIVER TRANSPLANT AND DEATH. MOST OF THE CASES OF LIVER INJURY ARE ASSOCIATED WITH THE USE OF ACETAMINOPHEN AT DOSES THAT EXCEED 4000 MILLIGRAMS PER DAY, AND OFTEN INVOLVE MORE THAN ONE ACETAMINOPHEN-CONTAINING PRODUCT.

DESCRIPTION



Butalbital and acetaminophen are supplied in tablet form for oral administration.

Butalbital (5-allyl-5-isobutylbarbituric acid), a slightly bitter, white, odorless, crystalline powder, is a short to intermediate-acting barbiturate. It has the following structural formula:

butalbital chemical structure
C11 H16 N2 O3 MW=224.26
Acetaminophen (4�-hydroxyacetanilide), a slightly bitter, white, odorless, crystalline powder, is a non-opiate, non-salicylate analgesic and antipyretic. It has the following structural formula:

acetaminophen chemical structure
C8 H9 NO2 MW=151.16
Each Bupap Tablet contains:

Butalbital �����������������.50 mg
Warning: May be habit-forming.
Acetaminophen ���������������650 mg

In addition, each tablet contains the following inactive ingredients: colloidal silicon dioxide, croscarmellose sodium, crospovidone, microcrystalline cellulose, povidone, pregelatinized starch, stearic acid with FD&C Blue #1 Lake as coloring.

CLINICAL PHARMACOLOGY

This combination drug product is intended as a treatment for tension headache.

It consists of a fixed combination of butalbital and acetaminophen. The role each component plays in the relief of the complex of symptoms known as tension headache is incompletely understood.

Pharmacokinetics
The behavior of the individual components is described below.

Butalbital: Butalbital is well absorbed from the gastrointestinal tract and is expected to distribute to most tissues in the body. Barbiturates in general may appear in breast milk and readily cross the placental barrier. They are bound to plasma and tissue proteins to a varying degree and binding increases directly as a function of lipid solubility.

Elimination of butalbital is primarily via the kidney (59% to 88% of the dose) as unchanged drug or metabolites. The plasma half-life is about 35 hours. Urinary excretion products include parent drug (about 3.6% of the dose), 5-isobutyl-5-(2,3-dihydroxypropyl) barbituric acid (about 24% of the dose), 5-allyl-5(3-hydroxy-2-methyl-l-propyl) barbituric acid (about 4.8% of the dose), products with the barbituric acid ring hydrolyzed with excretion of urea (about 14% of the dose), as well as unidentified materials. Of the material excreted in the urine, 32% is conjugated.

The in vitro plasma protein binding of butalbital is 45% over the concentration range of 0.5 to 20 mcg/mL. This falls within the range of plasma protein binding (20% to 45%) reported with other barbiturates such as phenobarbital, pentobarbital, and secobarbital sodium. The plasma-to-blood concentration ratio was almost unity indicating that there is no preferential distribution of butalbital into either plasma or blood cells (see OVERDOSAGE for toxicity information).

Acetaminophen: Acetaminophen is rapidly absorbed from the gastrointestinal tract and is distributed throughout most body tissues. The plasma half-life is 1.25 to 3 hours, but may be increased by liver damage and following overdosage. Elimination of acetaminophen is principally by liver metabolism (conjugation) and subsequent renal excretion of metabolites. Approximately 85% of an oral dose appears in the urine within 24 hours of administration, most as the glucuronide conjugate, with small amounts of other conjugates and unchanged drug. (See OVERDOSAGE for toxicity information).

INDICATIONS AND USAGE

Bupap (butalbital and acetaminophen) Tablets are indicated for the relief of the symptom complex of tension (or muscle contraction) headache.

Evidence supporting the efficacy and safety of this combination product in the treatment of multiple recurrent headaches is unavailable.

Caution in this regard is required because butalbital is habit-forming and potentially abusable.

Bupap 50mg 300mg Tab 100 by Valeant Phar
NDC No. 00095-3000-01 UPC/GTIN No. 3-00953-00001-1 MPN 300001 Only Lic.-Physician,Pharmacy,Dentist,Drug Mfg,Dist.,Gov,Hospital,Lic.Lab,Naturalist,Naturopath,NP,Optometrist,Pharmacist,PA,Physical Thera

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Valeant Pharma

BUTALBITAL/ACETAMINOPHEN
Only Lic.-Physician,Pharmacy,Dentist,Drug Mfg,Dist.,Gov,Hospital,Lic.Lab,Naturalist,Naturopath,NP,Optometrist,Pharmacist,PA,Physical Therapist,Podiatrist,Research Co.,Uni.,VA,Vet & Wholesalers in scop

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