Rx Only

500428       Rev. 08/2013

DESCRIPTION

Each PRODRIN Caplet contains:

Isometheptene Mucate ......................................... 65 mg

Caffeine ............................................................... 20 mg

Acetaminophen .................................................. 325 mg

Isometheptene Mucate is a white crystalline powder having a characteristic aromatic odor and bitter taste. It is an unsaturated aliphatic amine with sympathomimetic properties. Isometheptene mucate has the following structural formula:

Caffeine is 1H-Purine-2,6-dione, 3,7-dyhydro-1,3,7-trimethyl-. It has the following structural formula:

Acetaminophen, a non-salicylate, occurs as a white, odorless, crystalline powder, possessing a slightly bitter taste. Acetaminophen is Acetamide, N-(4-hydroxyphenyl)-. It has the following structural formula:

Inactive ingredients include calcium phosphate, colloidal silicone dioxide, crospovidone polyplasdone, magnesium stearate, microcrystalline cellulose, Povidone, Prosolv, and stearic acid.

CLINICAL PHARMACOLOGY

Isometheptene mucate, a sympathomimetic amine, acts by constricting dilated cranial and cerebral arterioles, thus reducing the stimuli that lead to vascular headaches. It is particularly desirable in patients predisposed to nausea and vomiting, and where ergotamines are precluded. Its action is similar to ergotamine but possesses a low order of toxicity.

Caffeine, also a cranial vasoconstrictor, is added to further enhance the vasoconstrictor effect. It is also used as a central stimulant for relief of headache.

Acetaminophen, an effective non-narcotic analgesic, reduces the perception of pain impulses originating from dilated cerebral vessels; no hyperacidity of stomach and less allergies than aspirin.

INDICATIONS

For relief of tension and vascular headaches.*

CONTRAINDICATIONS

PRODRIN is contraindicated in Glaucoma and/or severe cases of renal disease, hypertension, organic heart disease, hepatic disease, and in those patients who are onmonoamine oxidase inhibitor (MAOI) therapy.

WARNINGS

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 4,000 milligrams per day, and often involve more than one acetaminophen-containing product. The excessive intake of acetaminophen may be intentional to cause self-harm or unintentional as patients attempt to obtain more pain relief or unknowingly take other acetaminophen-containing products. The risk of acute liver failure is higher in individuals with underlying liver disease and in individuals who ingest alcohol while taking acetaminophen.

Instruct patients to look for acetaminophen or APAP on package labels and not to use more than one product that contains acetaminophen. Instruct patients to seek medical attention immediately upon ingestion of more than 4,000 milligrams of acetaminophen per day, even if they feel well.

Serious Skin Reactions - Rarely, acetaminophen can cause serious skin reactions such as acute generalized exanthematous pustulosis (AGEP), Stevens-Johnson Syndrome (SJS), and toxic epidermal necrolysis (TEN), which can be fatal. Patients should be informed about the signs of severe skin reactions, and use of the drug should be discontinued at the first appearance of skin rash or any other sign of hypersensitivity.

Hypersensitivity/Anaphylaxis – There have been post-marketing reports of hypersensitivity and anaphylaxis associated with the use of acetaminophen. Clinical signs included swelling of the face, mouth, and throat, respiratory distress, urticaria, rash, pruritus, and vomiting. There were infrequent reports of life-threatening anaphylaxis requiring emergency medical attention. Instruct patients to discontinue Prodrin Caplets immediately and seek medical care if they experience these symptoms. Do not prescribe Prodrin Caplets for patients with acetaminophen allergy.

PRECAUTIONS

Caution should be observed in hypertension, peripheral vascular disease and after recent cardiovascular attacks.

ADVERSE REACTIONS

Hypersensitive patients have shown rash and transient dizziness, this can be eliminated by reducing dosage.

OVERDOSAGE

Following an acute overdosage, toxicity may result.

Acetaminophen – In acetaminophen overdosage: dose-dependent, potentially fatal hepatic necrosis is the most serious adverse effect. Renal tubular necrosis, hypoglycemic coma and coagulation defects may also occur. 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 post-ingestion.

DOSAGE AND ADMINISTRATION

FOR RELIEF OF MIGRAINE HEADACHE: The usual adult dosage is one or two caplets at once, followed by one caplet every hour until relieved, up to 5 caplets within a twelve hour period.

FOR RELIEF OF TENSION HEADACHE: The usual adult dosage is one or two caplets every four hours up to 8 caplets a day.

HOW SUPPLIED

Prodrin Caplets are supplied as white caplets debossed “PRODRIN” on one side. The opposite side is plain. Available in bottles of 50 caplets, NDC 15014-145-50.

KEEP THIS AND ALL MEDICATION OUT OF THE REACH OF CHILDREN. IN CASE OF ACCIDENTAL OVERDOSE, CALL A DOCTOR OR CONTACT A POISON CONTROL CENTER IMMEDIATELY.

PRINCIPAL DISPLAY PANEL

NDC 15014-145-50

PRODRIN

CAPLETS
Rx ONLY

Isometheptene Mucate ......................................... 65 mg

Caffeine ............................................................... 20 mg

Acetaminophen .................................................. 325 mg

Net Contents: 50 Caplets