Clopidogrelum Uses, Dosage, Side Effects, Food Interaction and all others data.

(Clopidogrelum) is an inhibitor of platelet aggregation. Lopirel (Clopidogrelum) selectively inhibits the binding of adenosine diphosphate (ADP) to its platelet receptor and the subsequent ADP-mediated activation of the glycoprotein GPIIb/IIIa complex, thereby inhibiting platelet aggregation.

Clopidogrelum is a prodrug of a platelet inhibitor used to reduce the risk of myocardial infarction and stroke. It has a long duration of action as it is taken once daily and a large therapeutic window as it is given in doses of 75-300mg daily.

Trade Name Clopidogrelum
Availability Prescription only
Generic Clopidogrel
Clopidogrel Other Names Clopidogrel, Clopidogrelum
Related Drugs aspirin, lisinopril, metoprolol, propranolol, Xarelto, Plavix, Brilinta, enoxaparin, rivaroxaban, pravastatin
Formula C16H16ClNO2S
Weight Average: 321.822
Monoisotopic: 321.059027158
Protein binding

Both the active and inactive metabolites of clopidogrel are 98% protein bound in plasma. Studies in cows show clopidogrel 71-85.5% bound to serum albumin.

Groups Approved
Therapeutic Class Anti-platelet drugs
Available Country
Last Updated: September 19, 2023 at 7:00 am


(Clopidogrelum) is used for the reduction of atherosclerotic events (myocardial infarction, ischaemic stroke, and vascular death) in patients with atherosclerosis documented by recent stroke, recent myocardial infarction, or established peripheral arterial disease.

Clopidogrelum is also used to associated treatment for these conditions: Acute Coronary Syndrome (ACS), Acute Myocardial Infarction (AMI), Cardiovascular Events, Atherothrombotic events

How Clopidogrelum works

Clopidogrelum is metabolized to its active form by carboxylesterase-1. The active form is a platelet inhibitor that irreversibly binds to P2Y12 ADP receptors on platelets. This binding prevents ADP binding to P2Y12 receptors, activation of the glycoprotein GPIIb/IIIa complex, and platelet aggregation.


Clopidogrelum dosage

The recommended dose of Lopirel (Clopidogrelum) is 75 mg once daily with or without food.

Side Effects

Generally Clopidogrelum is well tolerated. However, a few common side effects i.e. Influenza-like symptoms, headache, upper respiratory tract infection, dizziness, muscle and back pain, and rash may occur.


A single dose of clopidogrel at 1500-2000mg/kg was lethal to mice and rats while 3000mg/kg was lethal to baboons. Symptoms of overdose include vomiting, breathing difficulty, gastrointestinal hemorrhage, and prostration. Clopidogrelum is irreversibly bound to platelets for their lifetime, which is approximately 11 days. Overdoses of clopidogrel can be treated with platelet transfusions to restore clotting ability.


As with other anti-platelet agents, Clopidogrelum should be used with caution in patients who may be at risk of increased bleeding from trauma, surgery, or other pathological conditions. Clopidogrelum should be discontinued 7 days prior to surgery. Clopidogrelum should be used with caution in hepatically impaired patients who may have bleeding diatheses.


Concomitant use of Heparin, Warfarin and NSAIDs with Clopidogrelum should be undertaken with caution. Clopidogrelum potentiate the effect of Aspirin on collagen-induced platelet aggregation. The safety of chronic concomitant administration of Aspirin and Clopidogrelum has not been established.

Food Interaction

  • Take with or without food.

Volume of Distribution

The apparent volume of distribution of clopidogrel is 39,240±33,520L.

Elimination Route

A 75mg oral dose of clopidogrel is 50% absorbed from the intestine. Clopidogrelum can be taken with or without food. A meal decreases the AUC of the active metabolite by 57%. The active metabolite of clopidogrel reaches a maximum concentration after 30-60 minutes. Clopidogrelum reached a Cmax of 2.04±2.0ng/mL in 1.40±1.07h.

The AUC for a 300mg oral dose of clopidogrel was 45.1±16.2ng*h/mL for poor metabolizers, 65.6±19.1ng*h/mL for intermediate metabolizers, and 104.3±57.3ng*h/mL for extensive metabolizers. The Cmax was 31.3±13ng/mL for poor metabolizers, 43.9±14ng/mL for intermediate metabolizers, and 60.8±34.3ng/mL for extensive metabolizers.

Half Life

That half life of clopidogrel is approximately 6 hours following a 75mg oral dose while the half life of the active metabolite is approximately 30 minutes.


The clearance of a 75mg oral dose was 18,960±15,890L/h and for a 300mg oral dose was 16,980±10,410L/h.

Elimination Route

An oral dose of radiolabelled clopidogrel is excreted 50% in the urine and 46% in the feces over 5 days. The remainder of clopidogrel is irreversibly bound to platelets for their lifetime, or approximately 8-11 days.

Pregnancy & Breastfeeding use

Pregnancy: There are no adequate and well-controlled studies of Clopidogrelum in pregnant women. However, Clopidogrelum should be used during pregnancy only if clearly needed.

Lactation: Clopidogrelum is not recommended for use while breast-feeding. It is not known for sure whether Clopidogrelum is excreted in breast milk, although it is suspected that it is.


Clopidogrelum is contraindicated in patients with a hypersensitivity to the drug substance or any component of the product, and those with active pathological bleeding such as peptic ulcer or intracranial hemorrhage.

Special Warning

Use in children: Safety and effectiveness of Clopidogrelum in pediatric population have not been established.

Acute Overdose

In the event of over dosage no adverse effects were reported and no therapy was substituted.

Symptoms: Prolonged bleeding time and subsequent bleeding complications.

Management: May restore clotting ability with platelet transfusion.

Storage Condition

Store at 25° C.

Innovators Monograph

You find simplified version here Clopidogrelum

Clopidogrelum contains Clopidogrel see full prescribing information from innovator Clopidogrelum Monograph, Clopidogrelum MSDS, Clopidogrelum FDA label


What is Clopidogrelum used for?

Clopidogrelum is an antiplatelet medication used to reduce the risk of heart disease and stroke in those at high risk. It is also used together with aspirin in heart attacks and following the placement of a coronary artery stent. It prevents platelets from sticking together and forming a dangerous blood clot. Taking Clopidogrelum helps prevent blood clots if you have an increased risk of having them.

How safe is Clopidogrelum?

Clopidogrelum is generally safe to take for a long time. In fact, it works best if you take it for many months or even years. If you're at risk of getting a stomach ulcer, your doctor may prescribe a medicine to help protect your stomach while you're taking Clopidogrelum.

how does Clopidogrelum work?

Clopidogrelum slows the blood's clotting action by making platelets less sticky. Platelets are blood cells that stick together to block cuts and breaks in blood vessels. But if you're at risk of heart attack or stroke, platelets can stick together inside already narrowed blood vessels to form a clot.

What are the common side effects of Clopidogrelum?

Common side effects of Clopidogrelum are include:

  • excessive tiredness.
  • headache.
  • dizziness.
  • nausea.
  • vomiting.
  • stomach pain.
  • diarrhea.
  • nosebleed.

Is Clopidogrelum safe during pregnancy?

Clopidogrelum can be used throughout pregnancy. There may be another issue related to delivery, however. The patient in question is planning to have a repeat cesarean, and there is some evidence that Clopidogrelum may cause more hemorrhagic complications of surgery.

Is Clopidogrelum safe during breastfeeding?

The manufacturer reports that no adverse effects have been observed in breastfed infants with maternal Clopidogrelum use during lactation in a small number of postmarketing cases.

Can I drink alcohol with Clopidogrelum?

You can drink alcohol with Clopidogrelum. But do not drink too much while taking this medicine.

When should be taken of Clopidogrelum?

It is usually taken once a day with or without food. Take Clopidogrelum at around the same time every day. Follow the directions on your prescription label carefully, and ask your doctor or pharmacist to explain any part you do not understand.

Can I take Clopidogrelum on an empty stomach?

You can be taken with or without food.

How long does Clopidogrelum take to work?

Clopidogrelum works within 2 hours of taking it.

How is Clopidogrelum eliminated from the body?

An oral dose of radiolabelled Clopidogrelum is excreted 50% in the urine and 46% in the feces over 5 days. The remainder of Clopidogrelum is irreversibly bound to platelets for their lifetime, or approximately 8-11 days.

Is it safe to take Clopidogrelum every other day?

Long term dual anti-platelet therapy with aspirin 81 mg daily and Clopidogrelum 75 mg every other day beyond 12 months after PCI with DES may be a safe and efficacious cost-saving strategy to prevent VLST.

What is Clopidogrelum half-life?

Oral dose of 75 mg, Clopidogrelum has a half-life of approximately 6 hours.

Can I take Clopidogrelum for a long time?

Clopidogrelum oral tablet is used for long-term treatment. It comes with serious risks if you don't take it as prescribed. If you stop taking the drug or don't take it at all: You increase your risk of heart attack or stroke. These conditions can be fatal.

Who should not take Clopidogrelum?

You should not use Clopidogrelum if you have any active bleeding such as a stomach ulcer or bleeding in the brain.Clopidogrelum increases your risk of bleeding, which can be severe or life-threatening. Call your doctor or seek emergency medical attention if you have bleeding that will not stop, if you have blood in your urine, black or bloody stools, or if you cough up blood or vomit that looks like coffee grounds.

What happens if I miss a dose?

Take Clopidogrelum as soon as you can, but skip the missed dose if it is almost time for your next dose. Do not take two doses at one time.

What happens if I overdose?

Seek emergency medical attention.Overdose can cause excessive bleeding.

Can Clopidogrelum cause heart attacks?

Clopidogrelum may be at increased risk of serious problems like heart attacks or strokes.

Does Clopidogrelum affect the kidneys?

In summary, among patients hospitalized with ACS and treated with Clopidogrelum, lower levels of kidney function were associated with a greater risk of death, hospitalization for AMI, and major bleeding.

Does Clopidogrelum affect sleep?

Clopidogrelum are among the most prescribed drugs in cardiology and are not cited as causing insomnia or sleepiness.

Does Clopidogrelum affect the liver?

Liver damage is a rare side effect of Clopidogrelum.

Does Clopidogrelum weaken immune system?

Clopidogrelum may also cause weak immunosuppression that might contribute to risk of fatal infections.

*** Taking medicines without doctor's advice can cause long-term problems.