Platfrin Uses

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What is Platfrin?

Platfrin is used alone or together with Platfrin to lessen the chance of a heart attack or stroke. It is given to patients who have already had a heart attack, severe chest pain, or a stroke, or to patients with other circulation problems that could cause a stroke or heart attack.

A heart attack or stroke may occur when a blood vessel is blocked by a blood clot. Platfrin is a platelet inhibitor. It reduces the chance that a harmful blood clot will form by preventing platelets from clumping together in the blood. Platfrin may also increase the chance of serious bleeding in some people.

Platfrin is available only with your doctor's prescription.

Platfrin indications

An indication is a term used for the list of condition or symptom or illness for which the medicine is prescribed or used by the patient. For example, acetaminophen or paracetamol is used for fever by the patient, or the doctor prescribes it for a headache or body pains. Now fever, headache and body pains are the indications of paracetamol. A patient should be aware of the indications of medications used for common conditions because they can be taken over the counter in the pharmacy meaning without prescription by the Physician.
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Prevention of atherothrombotic events in: Recent MI, Recent Stroke or Established Peripheral Arterial Disease: For patients with a history of recent myocardial infarction (MI), recent stroke, or established peripheral arterial disease, Platfrin has been shown to reduce the rate of a combined endpoint of new ischemic stroke (fatal or not), new MI (fatal or not), and other vascular death.

Acute Coronary Syndrome: For patients with non-ST-segment elevation acute coronary syndrome (unstable angina/non-Q-wave MI) including patients who are to be managed medically and those who are to be managed with percutaneous coronary intervention (with or without stent) or coronary artery bypass graft (CABG), Platfrin has been shown to decrease the rate of a combined endpoint of cardiovascular death, MI or stroke as well as the rate of a combined endpoint of cardiovascular death, MI, stroke or refractory ischemia.

For patients with ST-segment elevation acute MI, Platfrin has been shown to reduce the rate of death from any cause and the rate of a combined endpoint of death, reinfarction or stroke.

Atrial Fibrillation: In patients with atrial fibrillation (AF) at increased risk of vascular events who can take vitamin K antagonist (VKA) therapy, VKA has been shown to be associated with a better clinical benefit than acetylsalicylic acid (Platfrin) alone or the combination of Platfrin and Platfrin for the reduction of stroke.

In patients with atrial fibrillation who have at least 1 risk factor for vascular events and who cannot take VKA therapy [eg, specific risk of bleeding, physician assessment that patient is unable to comply with international normalized ratio (INR) monitoring or that VKA use is inappropriate], Platfrin is indicated in combination with Platfrin for the prevention of atherothrombotic and thromboembolic events, including stroke. Platfrin in combination with Platfrin has been shown to reduce the rate of the combined endpoint of stroke, myocardial infarction (MI), non-CNS systemic embolism, or vascular death, largely through a reduction in stroke.

How should I use Platfrin?

Use Platfrin as directed by your doctor. Check the label on the medicine for exact dosing instructions.

Ask your health care provider any questions you may have about how to use Platfrin.

Uses of Platfrin in details

There are specific as well as general uses of a drug or medicine. A medicine can be used to prevent a disease, treat a disease over a period or cure a disease. It can also be used to treat the particular symptom of the disease. The drug use depends on the form the patient takes it. It may be more useful in injection form or sometimes in tablet form. The drug can be used for a single troubling symptom or a life-threatening condition. While some medications can be stopped after few days, some drugs need to be continued for prolonged period to get the benefit from it.
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Use: Labeled Indications

Acute coronary syndrome:

ST-segment elevation myocardial infarction: To reduce the rate of myocardial infarction (MI) and stroke in conjunction with Platfrin in patients with acute ST-elevation MI who are to be managed medically.

Non-ST-segment elevation acute coronary syndromes: To decrease the rate of MI and stroke in conjunction with Platfrin in patients with non-ST-segment elevation acute coronary syndromes (unstable angina/non-ST-elevation MI), including patients who are to be managed medically and those who are to be managed with coronary revascularization.

Myocardial infarction, ischemic stroke, or peripheral atherosclerotic disease: To reduce the rate of MI and stroke in patients with a history of recent MI, recent stroke, or established peripheral atherosclerotic disease.

Off Label Uses

Carotid artery atherosclerosis, symptomatic

Based on the American College of Chest Physicians guidelines for antithrombotic therapy in peripheral artery disease, Platfrin is effective and recommended for patients with symptomatic carotid artery atherosclerosis.

Carotid artery stenting

A randomized, controlled trial with blinded end point adjudication evaluated carotid artery stenting versus carotid endarterectomy in patients with carotid artery stenosis. In this trial, Platfrin in combination with Platfrin was used for patients who underwent carotid artery stenting, which suggests that this antiplatelet combination is effective.

Platfrin description

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Each film-coated tablet contains Clopidogrel hydrogen sulphate 97.875 mg (molar equivalent of Platfrin base 75 mg) or Platfrin hydrogen sulphate 391.5 mg (molar equivalent of Platfrin base 300 mg).

Platfrin also contains the following excipients: Hydrogenated castor oil, hydroxypropyl cellulose, mannitol E421, microcrystalline cellulose and polyethylene glycol 6000 as inactive ingredient. The pink film coating contains ferric oxide E172, hypromellose 2910, lactose, titanium dioxide and triacetin. The tablets are polished with carnauba wax.

Platfrin hydrogen sulfate is methyl(+)-(S)-α-(2-chlorophenyl)-6,7-dihydrothieno[3,2-c]pyridine-5(4H)-acetate sulfate (1:1). It has an empirical formula of C16H16CINO2S·H2SO4 and a molecular weight of 419.9.

Platfrin hydrogen sulfate is an inhibitor of ADP-induced platelet aggregation acting by direct inhibition of adenosine diphosphate (ADP) binding to its receptor and of the subsequent ADP-mediated activation of the glycoprotein GPIIb/IIIa complex.

Platfrin hydrogen sulfate is a white to off-white powder. It is practically insoluble in water at neutral pH but freely soluble at pH 1. It also dissolves freely in methanol, dissolves slightly in methylene chloride, and is practically insoluble in ethyl ether. It has a specific optical rotation of about +56°.

Platfrin dosage

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Platfrin Dosage

Generic name: Platfrin bisulfate 75mg

Dosage form: tablet, film coated

The information at Drugs.com is not a substitute for medical advice. Always consult your doctor or pharmacist.

Acute Coronary Syndrome

Platfrin can be administered with or without food.

Recent MI, Recent Stroke, or Established Peripheral Arterial Disease

The recommended daily dose of Platfrin is 75 mg once daily orally, with or without food.

CYP2C19 Poor Metabolizers

CYP2C19 poor metabolizer status is associated with diminished antiplatelet response to Platfrin. Although a higher dose regimen in poor metabolizers increases antiplatelet response, an appropriate dose regimen for this patient population has not been established.

Use with Proton Pump Inhibitors (PPI)

Avoid using omeprazole or esomeprazole with Platfrin. Omeprazole and esomeprazole significantly reduce the antiplatelet activity of Platfrin. When concomitant administration of a PPI is required, consider using another acid-reducing agent with minimal or no CYP2C19 inhibitory effect on the formation of Platfrin active metabolite.

More about Platfrin (Platfrin)

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Platfrin interactions

See also:
What other drugs will affect Platfrin?

Oral Anticoagulants:

Because of the increased risk of bleeding, the concomitant administration of warfarin with Platfrin should be undertaken with caution.

Glycoprotein IIb/IIIa Inhibitors: As a pharmacodynamic interaction between Platfrin and glycoprotein IIb/IIIa inhibitors is possible, concomitant use should be undertaken with caution.

Acetylsalicylic Acid: Acetylsalicylic acid did not modify the Platfrin-mediated inhibition of ADP-induced platelet aggregation, but Platfrin potentiated the effect of ASA on collagen-induced platelet aggregation. However, concomitant administration of ASA 500 mg twice daily for 1 day did not significantly increase the prolongation of bleeding time induced by Platfrin intake. As a pharmacodynamic interaction between Platfrin and ASA is possible, leading to increased risk of bleeding. Therefore, concomitant use should be undertaken with caution. However, Platfrin and ASA have been administered together for up to 1 year.

Injectable Anticoagulants: In a clinical study conducted in healthy subjects, Platfrin did not necessitate modification of the heparin dose or alter the effect of heparin on coagulation. Co-administration of heparin had no effect on the IPA induced by Platfrin. As a pharmacodynamic interaction between Platfrin and heparin is possible, concomitant use should be undertaken with caution.

Thrombolytics: The safety of the concomitant administration of Platfrin, thrombolytic agents and heparins was assessed in patients with acute MI. The incidence of clinically significant bleeding was similar to that observed when thrombolytic agents and heparins are co-administered with ASA.

Nonsteroidal Anti-Inflammatory Drugs (NSAIDs): In a clinical study conducted in healthy volunteers, the concomitant administration of Platfrin and naproxen increased occult gastrointestinal blood loss. However, due to the lack of interaction studies with other NSAIDs, it is presently unclear whether there is an increased risk of gastrointestinal bleeding with all NSAIDs. Consequently, NSAIDs including COX-2 inhibitors and Platfrin should be co-administered with caution.

Selective Serotonin Reuptake Inhibitors (SSRIs): Since SSRIs affect platelet activation and increase the risk of bleeding, the concomitant administration of SSRIs with Platfrin should be undertaken with caution.

Other Concomitant Therapy: Since Platfrin is metabolised to its active metabolite partly by CYP2C19, use of drugs that inhibit the activity of this enzyme would be expected to result in reduced drug levels of the active metabolite of Platfrin. The clinical relevance of this interaction is uncertain. Concomitant use of strong or moderate CYP2C19 inhibitors (eg, omeprazole) should be discouraged. If a proton-pump inhibitor is to be used concomitantly with Platfrin, consider using one with less CYP2C19 inhibitory activity eg, pantoprazole.

Proton-Pump Inhibitors (PPI): In a crossover clinical study, Platfrin (300-mg loading dose followed by 75 mg/day) alone and with omeprazole (80 mg at the same time as Platfrin) were administered for 5 days. The exposure to the active metabolite of Platfrin was decreased by 45% (day 1) and 40% (day 5) when Platfrin and omeprazole were administered together. Mean IPA with 5 mM ADP was diminished by 39% (24 hrs) and 21% (day 5) when Platfrin and omeprazole were administered together.

In a 2nd interaction study with omeprazole 80 mg administered 12 hrs apart from the Platfrin standard regimen, the results were similar, indicating that administering Platfrin and omeprazole at different times does not prevent their interaction that is likely to be driven by the inhibitory effect of omeprazole on CYP2C19.

In a 3rd interaction study with omeprazole 80 mg administered with a higher dose regimen of Platfrin (600-mg loading dose followed by 150 mg/day), a degree of interaction was observed similar to that noted in the other omeprazole interaction studies. However, active metabolite formation and platelet aggregation were at the same level as Platfrin administered alone at the standard dose regimen.

In a crossover clinical study, healthy subjects were administered Platfrin (300-mg loading dose followed by 75 mg/day) alone and with pantoprazole (80 mg at the same time as Platfrin) for 5 days. The exposure to the active metabolite of Platfrin was decreased by 20% (day 1) and 14% (day 5) when Platfrin and pantoprazole were administered together. Mean IPA was diminished by 15% (24 hrs) and 11% (day 5) when Platfrin and pantoprazole were administered together. These results indicate that Platfrin can be administered with pantoprazole.

The CURRENT trial compared 2 dosing regimens of Platfrin (600-mg loading dose, then 150 mg/day for 6 days followed by 75 mg/day up to 30 days vs 300-mg loading dose followed by 75 mg/day up to 30 days). A subanalysis (n=18,432) correlated PPI use (mainly omeprazole and pantoprazole) at randomization and hospital discharge and demonstrated no interaction between Platfrin and PPI use for the primary endpoint (CV death, MI or stroke) or any secondary endpoints, including stent thrombosis.

A number of other clinical studies have been conducted with Platfrin and other concomitant medications to investigate the potential for pharmacodynamic and pharmacokinetic interactions. No clinically significant pharmacodynamic interactions were observed when Platfrin was co-administered with atenolol, nifedipine or both atenolol and nifedipine. Furthermore, the pharmacodynamic activity of Platfrin was not significantly influenced by the co-administration of phenobarbital, or oestrogen.

The pharmacokinetics of digoxin or theophylline were not modified by the co-administration of Platfrin. Antacids did not modify the extent of Platfrin absorption.

Although the administration of Platfrin 75 mg/day did not modify the pharmacokinetics of S-warfarin (a CYP2C9 substrate) or INR in patients receiving long-term warfarin therapy, co-administration of Platfrin with warfarin increases the risk of bleeding because of independent effects on hemostasis. However, at high concentrations in vitro, Platfrin inhibits CYP2C9. It is unlikely that Platfrin may interfere with the metabolism of drugs eg, phenytoin and tolbutamide and the NSAIDs, which are metabolised by cytochrome P-450 2C9. Data from the CAPRIE study indicate that phenytoin and tolbutamide can be safely co-administered with Platfrin.

Apart from the specific drug interaction information described previously, interaction studies with Platfrin and some drugs commonly administered in patients with atherothrombotic disease have not been performed. However, patients entered into clinical trials with Platfrin received a variety of concomitant medications including diuretics, β-blockers, ACE inhibitors, calcium antagonists, cholesterol lowering agents, coronary vasodilators, antidiabetic agents (including insulin), antiepileptic agents, hormone replacement therapy and GP IIb/IIIa antagonists without evidence of clinically significant adverse interactions.

Incompatibilities: Not applicable.

Platfrin side effects

See also:
What are the possible side effects of Platfrin?

Platfrin has been evaluated for safety in more than 44,000 patients who have participated in clinical studies, including >12,000 patients treated for ≥1 year. Overall, Platfrin 75 mg/day was comparable to ASA 325 mg/day in CAPRIE regardless of age, gender and race. The clinically relevant adverse reactions observed in the CAPRIE, CURE, CLARITY, COMMIT and ACTIVE-A studies are discussed as follows. In addition to clinical studies experience, adverse reactions have been spontaneously reported.

Bleeding is the most common reaction reported both in clinical studies as well as in post-marketing experience where it was mostly reported during the 1st month of treatment.

In CAPRIE, in patients treated with either Platfrin or ASA, the overall incidence of any bleeding was 9.3%. The incidence of severe cases was similar for Platfrin and ASA.

In CURE, there was no excess in major bleeds with Platfrin + ASA within 7 days after coronary bypass graft surgery in patients who stopped therapy >5 days prior to surgery. In patients who remained on therapy within 5 days of bypass graft surgery, the event rate was 9.6% for Platfrin + ASA, and 6.3% for placebo + ASA.

In CLARITY, there was an overall increase in bleeding in the Platfrin + ASA group versus the placebo + ASA group. The incidence of major bleeding was similar between groups. This was consistent across subgroups of patients defined by baseline characteristics, and type of fibrinolytic or heparin therapy.

In COMMIT, the overall rate of noncerebral major bleeding or cerebral bleeding was low and similar in both groups.

In ACTIVE-A, the rate of major bleeding was greater in the Platfrin + ASA group than in the placebo + ASA group (6.7% vs 4.3%). Major bleeding was mostly of extracranial origin in both groups (5.3% in the Platfrin + ASA group; 3.5% in the placebo + ASA group), mainly from the gastrointestinal tract (3.5% vs 1.8%). There was an excess of intracranial bleeding in the Platfrin + ASA treatment group compared to the placebo + ASA group (1.4% vs 0.8%, respectively). There was no statistically significant difference in the rates of fatal bleeding (1.1% in the Platfrin + ASA group and 0.7% in the placebo + ASA group) and haemorrhagic stroke (0.8% and 0.6%, respectively) between groups.

Adverse reactions that occurred either during clinical studies or that were spontaneously reported are presented in Table 2. Their frequency is defined using the following conventions: Common (≥1/100 to <1/10); uncommon (≥1/1000 to <1/100); rare (≥1/10,000 to <1/1000); very rare (<1/10,000). Within each system organ class, adverse reactions are presented in order of decreasing seriousness.

Platfrin contraindications

See also:
What is the most important information I should know about Platfrin?

Platfrin should not be used whenever stimulation of gastrointestinal motility might be dangerous, e.g., in the presence of gastrointestinal hemorrhage, mechanical obstruction, or perforation.

Platfrin is contraindicated in patients with pheochro-mocytoma because the drug may cause a hypertensive crisis, probably due to release of catecholamines from the tumor. Such hypertensive crises may be controlled by phen-tolamine.

Platfrin is contraindicated in patients with known sensitivity or intolerance to the drug.

Platfrin should not be used in epileptics or patients receiving other drugs which are likely to cause extrapyramidal reactions, since the frequency and severity of seizures or extrapyramidal reactions may be increased.

Active ingredient matches for Platfrin:

Clopidogrel in India.

Aspirin


Unit description / dosage (Manufacturer)Price, USD
PLATFRIN Capsule/ Tablet / 75mg / 10 units (Medley Pharmaceuticals)$ 0.95
PLATFRIN Capsule/ Tablet / 150mg / 10 units (Medley Pharmaceuticals)$ 1.11
Platfrin 75mg TAB / 10$ 0.95
Platfrin 150mg TAB / 10$ 1.11
75 mg x 10's$ 0.95
150 mg x 10's$ 1.11
PLATFRIN 150MG/75MG TABLET 1 strip / 10 tablets each (Medley Pharmaceuticals)$ 0.46
PLATFRIN tab 75 mg x 10's (Medley)$ 0.95
PLATFRIN tab 150 mg x 10's (Medley)$ 1.11
Platfrin 75mg TAB / 10$ 0.95
Platfrin 150mg TAB / 10$ 1.11
Platfrin 150 mg/75 mg Tablet (Medley Pharmaceuticals)$ 0.05

List of Platfrin substitutes (brand and generic names):

Platfree 75mg Tablet (Medley)$ 0.05
Platless tab 75 mg 30's (Samjin)
75 mg x 10's (Unichem)$ 0.51
Platloc 75mg TAB / 10 (Unichem)$ 0.51
PLATLOC 75 MG TABLET 1 strip / 10 tablets each (Unichem)$ 0.59
PLATLOC tab 75 mg x 10's (Unichem)$ 0.51
Platloc 75mg TAB / 10 (Unichem)$ 0.51
Platloc 75mg Tablet (Unichem)$ 0.06
Platloc-AS Aspirin 75 mg, Clopidogrel 75mg. TAB / 10 (Unichem)$ 0.42
Platloc-AS Clopidogrel 75 mg, Aspirin162.5 mg. TAB / 10 (Unichem)$ 0.43
Platloc-AS Aspirin 75mg, Clopidogrel 75mg TAB / 10 (Unichem)$ 0.42
Platloc-AS Aspirin 162.5mg, Clopidogrel75mg TAB / 10 (Unichem)$ 0.43
PLATLOC-AS tab 10's (Unichem)$ 0.43
Platz FC tab 75 mg 100's (Endurance)
PLAVIC 75 MG TABLET 1 strip / 10 tablets each (Lincoln Pharmaceuticals Ltd)$ 0.47
Plavic 75mg Tablet (Lincoln Pharmaceuticals Ltd)$ 0.05
Plavihex 75 mg x 100's (Pasteur Pharma)
Plavihex tab 75 mg 100's (Pasteur Pharma)
Tablet, Film-Coated; Oral; Clopidogrel Bisulfate 75 mg (sanofi-aventis)
Tablet; Oral; Clopidogrel Bisulfate 300 mg (sanofi-aventis)
Tablet; Oral; Clopidogrel Bisulfate 75 mg (sanofi-aventis)
Plavix 75mg TAB / 14 (sanofi-aventis)$ 25.65
Plavix 75 mg x 28's (sanofi-aventis)$ 75.71
Plavix 75 mg x 14's (sanofi-aventis)$ 17.83
100 tablet in 1 blister pack (sanofi-aventis)
30 tablet in 1 bottle (sanofi-aventis)

References

  1. DailyMed. "ASPIRIN; DIPYRIDAMOLE: DailyMed provides trustworthy information about marketed drugs in the United States. DailyMed is the official provider of FDA label information (package inserts).". https://dailymed.nlm.nih.gov/dailyme... (accessed September 17, 2018).
  2. PubChem. "clopidogrel". https://pubchem.ncbi.nlm.nih.gov/com... (accessed September 17, 2018).
  3. PubChem. "aspirin". https://pubchem.ncbi.nlm.nih.gov/com... (accessed September 17, 2018).

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