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DRUGS & SUPPLEMENTS
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Procardin
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Procardin uses
DESCRIPTION
PERSANTINE® (dipyridamole USP) is a platelet inhibitor chemically described as 2,2',2",2"'-[(4,8- Dipiperidinopyrimido[5,4-d]pyrimidine-2,6-diyl)dinitrilo]-tetraethanol. It has the following structural formula:
Procardin is an odorless yellow crystalline powder, having a bitter taste. It is soluble in dilute acids, methanol and chloroform, and practically insoluble in water.
Procardin tablets for oral administration contain:
Active Ingredient TABLETS 25 mg, 50 mg, and 75 mg : Procardin USP 25 mg, 50 mg and 75 mg, respectively.
Inactive Ingredients TABLETS 25 mg, 50 mg, and 75 mg : acacia, carnauba wax, corn starch, edible white ink, lactose monohydrate, magnesium stearate, D&C yellow #10 aluminum lake, D&C red #30, helendon aluminum pink lake, sodium benzoate, methylparaben, propylparaben, polyethylene glycol, povidone, sucrose, talc, titanium dioxide, and white wax.
CLINICAL PHARMACOLOGY
It is believed that platelet reactivity and interaction with prosthetic cardiac valve surfaces, resulting in abnormally shortened platelet survival time, is a significant factor in thromboembolic complications occurring in connection with prosthetic heart valve replacement.
Procardin tablets have been found to lengthen abnormally shortened platelet survival time in a dose-dependent manner.
In three randomized controlled clinical trials involving 854 patients who had undergone surgical placement of a prosthetic heart valve, Procardin tablets, in combination with warfarin, decreased the incidence of postoperative thromboembolic events by 62 to 91% compared to warfarin treatment alone. The incidence of thromboembolic events in patients receiving the combination of Procardin tablets and warfarin ranged from 1.2 to 1.8%. In three additional studies involving 392 patients taking Procardin tablets and coumarin-like anticoagulants, the incidence of thromboembolic events ranged from 2.3 to 6.9%.
In these trials, the coumarin anticoagulant was begun between 24 hours and 4 days postoperatively, and the Persantine® tablets were begun between 24 hours and 10 days postoperatively. The length of follow-up in these trials varied from 1 to 2 years.
Procardin tablets do not influence prothrombin time or activity measurements when administered with warfarin.
Mechanism of Action
Procardin inhibits the uptake of adenosine into platelets, endothelial cells and erythrocytes in vitro and in vivo; the inhibition occurs in a dose-dependent manner at therapeutic concentrations (0.5–1.9 μg/mL). This inhibition results in an increase in local concentrations of adenosine which acts on the platelet A2-receptor thereby stimulating platelet adenylate cyclase and increasing platelet cyclic-3',5'-adenosine monophosphate (cAMP) levels. Via this mechanism, platelet aggregation is inhibited in response to various stimuli such as platelet activating factor (PAF), collagen and adenosine diphosphate (ADP).
Procardin inhibits phosphodiesterase (PDE) in various tissues. While the inhibition of cAMP-PDE is weak, therapeutic levels of Procardin inhibit cyclic-3',5'-guanosine monophosphate-PDE (cGMP-PDE), thereby augmenting the increase in cGMP produced by EDRF (endothelium-derived relaxing factor, now identified as nitric oxide).
Hemodynamics
In dogs intraduodenal doses of Procardin of 0.5 to 4.0 mg/kg produced dose-related decreases in systemic and coronary vascular resistance leading to decreases in systemic blood pressure and increases in coronary blood flow. Onset of action was in about 24 minutes and effects persisted for about 3 hours.
Similar effects were observed following IV PERSANTINE® in doses ranging from 0.025 to 2.0 mg/kg.
In man the same qualitative hemodynamic effects have been observed. However, acute intravenous administration of Procardin may worsen regional myocardial perfusion distal to partial occlusion of coronary arteries.
Pharmacokinetics and Metabolism
Following an oral dose of Procardin tablets, the average time to peak concentration is about 75 minutes. The decline in plasma concentration following a dose of Procardin tablets fits a two-compartment model. The alpha half-life (the initial decline following peak concentration) is approximately 40 minutes. The beta half-life (the terminal decline in plasma concentration) is approximately 10 hours. Procardin is highly bound to plasma proteins. It is metabolized in the liver where it is conjugated as a glucuronide and excreted with the bile.
INDICATIONS AND USAGE
Procardin tablets are indicated as an adjunct to coumarin anticoagulants in the prevention of postoperative thromboembolic complications of cardiac valve replacement.
CONTRAINDICATIONS
Hypersensitivity to Procardin and any of the other components.
PRECAUTIONS
General
Coronary Artery Disease: Procardin has a vasodilatory effect and should be used with caution in patients with severe coronary artery disease. Chest pain maybe aggravated in patients with underlying coronary artery disease who are receiving Procardin.
Hepatic Insufficiency: Elevations of hepatic enzymes and hepatic failure have been reported in association with Procardin administration.
Hypotension: Procardin should be used with caution in patients with hypotension since it can produce peripheral vasodilation.
Laboratory Tests
Procardin has been associated with elevated hepatic enzymes.
Drug Interactions
No pharmacokinetic drug-drug interaction studies were conducted with Procardin® tablets. The following information was obtained from the literature.
Adenosine: Procardin has been reported to increase the plasma levels and cardiovascular effects of adenosine. Adjustment of adenosine dosage may be necessary.
Cholinesterase Inhibitors: Procardin may counteract the anticholinesterase effect of cholinesterase inhibitors, thereby potentially aggravating myasthenia gravis.
Carcinogenesis, Mutagenesis, Impairment of Fertility
In studies in which Procardin was administered in the feed to mice (up to 111 weeks in males and females) and rats (up to 128 weeks in males and up to 142 weeks in females), there was no evidence of drug-related carcinogenesis. The highest dose administered in these studies (75 mg/kg/day) was, on a mg/m2 basis, about equivalent to the maximum recommended daily human oral dose (MRHD) in mice and about twice the MRHD in rats. Mutagenicity tests of Procardin with bacterial and mammalian cell systems were negative. There was no evidence of impaired fertility when Procardin was administered to male and female rats at oral doses up to 500 mg/kg/day (about 12 times the MRHD on a mg/m2 basis). A significant reduction in number of corpora lutea with consequent reduction in implantations and live fetuses was, however, observed at 1250 mg/kg (more than 30 times the MRHD on a mg/m2 basis).
Pregnancy
Reproduction studies have been performed in mice, rabbits and rats at oral Procardin doses of up to 125 mg/kg, 40 mg/kg and 1000 mg/kg, respectively (about 1 ½, 2 and 25 times the maximum recommended daily human oraldose, respectively, on a mg/m2 basis) and have revealed no evidence of harm to the fetus due to Procardin. There are, however, no adequate and well-controlled studies in pregnant women. Because animal reproduction studies are not always predictive of human response, Procardin tablets should be used during pregnancy only if clearly needed.
As Procardin is excreted in human milk, caution should be exercised when Procardin tablets are administered to a nursing woman.
Safety and effectiveness in the pediatric population below the age of 12 years have not been established.
Adverse reactions at therapeutic doses are usually minimal and transient. On long-term use of Procardin tablets initial side effects usually disappear. The following reactions in Table 1 were reported in two heart valve replacement trials comparing Procardin tablets and warfarin therapy to either warfarin alone or warfarin and placebo:
| Adverse Reaction | Procardin Tablets / Warfarin | Placebo / Warfarin |
| Number of patients | 147 | 170 |
| Dizziness | 13.6% | 8.2% |
| Abdominal distress | 6.1% | 3.5% |
| Headache | 2.3% | 0.0% |
| Rash | 2.3% | 1.1% |
Other reactions from uncontrolled studies include diarrhea, vomiting, flushing and pruritus. In addition, angina pectoris has been reported rarely and there have been rare reports of liver dysfunction. On those uncommon occasions when adverse reactions have been persistent or intolerable, they have ceased on withdrawal of the medication.
When Persantine® (dipyridamole USP) tablets were administered concomitantly with warfarin, bleeding was no greater in frequency or severity than that observed when warfarin was administered alone. In rare cases, increased bleeding during or after surgery has been observed.
In post-marketing reporting experience, there have been rare reports of hypersensitivity reactions (such as rash, urticaria, severe bronchospasm, and angioedema), larynx edema, fatigue, malaise, myalgia, arthritis, nausea, dyspepsia, paresthesia, hepatitis, thrombocytopenia, alopecia, cholelithiasis, hypotension, palpitation, and tachycardia.
In case of real or suspected overdose, seek medical attention or contact a Poison Control Center immediately. Careful medical management is essential. Based upon the known hemodynamic effects of Procardin, symptoms such as warm feeling, flushes, sweating, restlessness, feeling of weakness and dizziness may occur. A drop in blood pressure and tachycardia might also be observed.
Symptomatic treatment is recommended, possibly including a vasopressor drug. Gastric lavage should be considered. Administration of xanthine derivatives (e.g., aminophylline) may reverse the hemodynamic effects of Procardin overdose. Since Procardin is highly protein bound, dialysis is not likely to be of benefit.
Adjunctive Use in Prophylaxis of Thromboembolism after Cardiac Valve Replacement. The recommended dose is 75-100 mg four times daily as an adjunct to the usual warfarin therapy. Please note that aspirin is not to be administered concomitantly with coumarin anticoagulants.
Procardin tablets are available as round, orange, sugar-coated tablets of 25 mg, 50 mg and 75 mg coded BI/17, BI/18 and BI/19, respectively.
They are available in bottles of 100 tablets as indicated below:
25 mg Tablets (NDC 0597-0017-01)
50 mg Tablets (NDC 0597-0018-01)
75 mg Tablets (NDC 0597-0019-01)
Store at 25°C (77°F); excursions permitted to 15°-30°C (59°-86°F). Keep out of reach of children.
Address medical inquiries to: http://us.boehringer-ingelheim.com, (800) 542-6257 or (800) 459-9906 TTY.
Distributed by:
Boehringer Ingelheim Pharmaceuticals, Inc.
Ridgefield, CT 06877 USA
Licensed from:
Boehringer Ingelheim
International GmbH
Manufactured by:
Boehringer Ingelheim Promeco, S.A. de C.V.,
Mexico City, Mexico
©Copyright Boehringer Ingelheim International GmbH 2006, ALL RIGHTS RESERVED
Printed in the USA
OT1500A
340067/US/7
Revised: June 20, 2006
Procardin (dipyridamole usp) Tablets
NDC:0597-0017-01
Procardin (dipyridamole usp) Tablets
NDC:0597-0018-01
Procardin (dipyridamole usp) Tablets
NDC:0597-0019-01
Procardin pharmaceutical active ingredients containing related brand and generic drugs:
Procardin available forms, composition, doses:
Composition is the list of ingredients which combinedly form a medicine. Both active ingredients and inactive ingredients form the composition. The active ingredient gives the desired therapeutic effect whereas the inactive ingredient helps in making the medicine stable.
Doses are various strengths of the medicine like 10mg, 20mg, 30mg and so on. Each medicine comes in various doses which is decided by the manufacturer, that is, pharmaceutical company. The dose is decided on the severity of the symptom or disease.