Generic Name: Clopidogrel
Brand Names: Plavix
Clopidogrel is an antiplatelet medication that prevents blood clots by keeping platelets from sticking together. It is used to reduce the risk of heart attack and stroke in people with cardiovascular disease.
Drug Class
P2Y12 ADP Receptor Antagonist (Thienopyridine Antiplatelet)
Pregnancy
Category B — Animal reproduction studies have not shown fetal harm, but human data are very limited. Use during pregnancy only when the maternal benefit clearly outweighs potential fetal risk, and discontinue at least 5 to 7 days before scheduled neuraxial anesthesia or delivery to reduce bleeding risk.
Available Forms
Oral tablet (75 mg, 300 mg)
is prescribed to:
• Prevent heart attack and stroke in people with atherosclerosis • Treat acute coronary syndrome (unstable angina or heart attack) • Prevent blood clots after recent heart attack or stroke • Reduce clotting risk after coronary stent placement • Peripheral artery disease • Prevent cardiovascular events in high-risk patients
Often used in combination with aspirin (dual antiplatelet therapy).
These are general dosage guidelines. Your doctor will determine the appropriate dose for your specific situation.
| Condition | Starting Dose | Maintenance Dose |
|---|---|---|
| Acute coronary syndrome (NSTE-ACS, medically managed or PCI) | 300–600 mg loading dose | 75 mg once daily, typically for 12 months with aspirin |
| STEMI with PCI | 600 mg loading dose | 75 mg once daily for at least 12 months |
| Recent MI, recent stroke, or established PAD | 75 mg once daily (no loading dose required) | 75 mg once daily indefinitely per indication |
| Elective coronary stent (post-PCI maintenance) | 600 mg pre-procedure (per cath lab protocol) | 75 mg once daily for the duration recommended by cardiology |
Common side effects may include:
• Easy bruising • Bleeding that takes longer to stop • Nosebleeds • Headache • Dizziness • Diarrhea or constipation • Stomach pain or indigestion
Serious side effects (seek immediate medical attention):
• Signs of severe bleeding (bloody or black stools, coughing up blood, severe bleeding that won't stop) • Stroke symptoms (sudden numbness, confusion, vision changes, severe headache) • Signs of TTP (fever, weakness, pale skin, purple spots on skin, yellowing of eyes/skin) • Unusual bruising or bleeding • Blood in urine • Chest pain • Allergic reactions
Clopidogrel is a prodrug that requires hepatic CYP2C19 activation to its active metabolite, so interactions with CYP2C19 and bleeding-risk medications dominate the profile.
Clopidogrel, widely known by its brand name Plavix, is an antiplatelet medication that plays a crucial role in preventing blood clots in people with cardiovascular disease. It is one of the most commonly prescribed medications for preventing heart attacks and strokes.
Clopidogrel is a prodrug that must be activated by the liver to work effectively. Once activated, it:
Unlike aspirin, which blocks a different pathway, clopidogrel specifically targets ADP-mediated platelet activation, making it particularly effective when used alone or in combination with aspirin.
Clopidogrel is prescribed for several cardiovascular conditions:
Clopidogrel is typically taken once daily:
Dual Antiplatelet Therapy (DAPT): Often prescribed with aspirin (usually 81 mg daily) after stent placement or ACS. Duration depends on the clinical situation and stent type.
Avoid clopidogrel if you have:
Use with caution if you have:
Proton Pump Inhibitors (PPIs):
Other important interactions:
Approximately 2-14% of people (varies by ethnicity) have reduced-function CYP2C19 genetic variants that decrease clopidogrel's effectiveness. Genetic testing may be considered in certain situations, particularly after stent placement.
Poor metabolizers may:
Important considerations:
While taking clopidogrel:
To minimize bleeding risk while taking clopidogrel:
While taking clopidogrel:
Seek immediate medical attention if you experience:
Contact your doctor for non-emergency issues:
Treatment duration varies:
Never stop clopidogrel without consulting your cardiologist, especially within the first year after stent placement.
Studies have shown that clopidogrel:
Store clopidogrel at room temperature (77°F/25°C) away from moisture and heat. Keep in original container. Keep out of reach of children.
Disclaimer: This information is for educational purposes only and is not intended to replace professional medical advice, diagnosis, or treatment. Always consult your physician or other qualified healthcare provider with any questions about a medical condition or medication.
Consider discussing these topics at your next appointment:
This medication is commonly used to treat or manage the following conditions:
Hives (urticaria) are itchy, raised welts caused by histamine release, triggered by allergens, physical stimuli, medications, infections, stress, or sometimes, unknown factors.
Osteoarthritis, a common degenerative joint disease, causes pain, stiffness, and reduced motion due to cartilage breakdown from aging, genetics, obesity, injuries, or repetitive stress.
Peptic Ulcer Disease involves painful sores in the digestive tract, primarily caused by *H. pylori* infection or long-term NSAID use, eroding the protective mucus layer.
A stroke, caused by interrupted brain blood supply from blockage (ischemic) or bleeding (hemorrhagic), is a medical emergency requiring prompt treatment to minimize brain damage.
Vertigo, a spinning sensation distinct from dizziness, often stems from inner ear or brain issues like BPPV or Meniere's, sometimes triggered by head trauma or medication.
Medical Disclaimer: This information is for educational purposes only and should not be considered medical advice. Always consult with your healthcare provider before starting, stopping, or changing any medication. Your doctor can provide personalized recommendations based on your specific health condition and medical history.
Other medications in the same category
Talk to your doctor or pharmacist about whether Clopidogrel is right for you.
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