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This is an information resource — not medical advice.

PillCodex provides general educational information about medications. This content is not a substitute for professional medical advice, diagnosis, or treatment. Never start, stop, or change a medication based on what you read here. Always speak to your doctor, pharmacist, or qualified healthcare provider with questions about your medications.

🚨 If you are experiencing a medical emergency or think you may have taken too much of a medication, call emergency services (911 in the US) or go to your nearest emergency room immediately.

NSAID / Antiplatelet Agent✓ Over-the-counter

What Is Aspirin Used For?

Brand names: Bayer, Ecotrin, Bufferin

Aspirin is one of the oldest and most versatile medications, used for pain relief, fever reduction, and in low doses to prevent blood clots and heart attacks.

What is Aspirin used for?

  • Mild to moderate pain
  • Fever reduction
  • Prevention of heart attack (low dose)
  • Prevention of stroke (low dose)
  • Anti-inflammatory conditions

How does Aspirin work?

Aspirin irreversibly blocks COX enzymes that produce prostaglandins (causing pain) and thromboxane A2 (causing platelet clumping). This makes it both a pain reliever and a blood thinner.

Dosage information

💊Available forms
  • 81mg tablets (low-dose/baby aspirin)
  • 325mg tablets
  • 500mg tablets
  • Enteric-coated versions
📏Typical dosage

Pain/fever: 325–650mg every 4–6 hours. Heart disease prevention: 81mg once daily only under doctor's recommendation.

⚠️ Dosage varies by individual. Always follow your doctor's or pharmacist's instructions — never self-dose based on general information.

Side effects

Common

  • Stomach upset and heartburn
  • Nausea
  • Stomach pain

⚠️ Serious — contact your doctor

  • Stomach ulcers and bleeding
  • Increased bleeding risk
  • Reye's syndrome in children with viral infections (serious — see warnings)
  • Tinnitus at high doses

Important warnings

NEVER give to children or teenagers with viral illnesses — risk of Reye's syndrome
Do not take in the third trimester of pregnancy
Stop before surgery — increases bleeding
Do not start daily aspirin for heart prevention without consulting your doctor

Drug interactions

These substances may interact with Aspirin. This is not a complete list — always tell your doctor and pharmacist ALL medications and supplements you take.

Warfarin (serious bleeding risk)Ibuprofen (reduces aspirin's antiplatelet effect)MethotrexateACE inhibitorsOther NSAIDs

Pregnancy & breastfeeding

🤰 Avoid in third trimester — low-dose use only under medical supervision

Always consult your doctor or obstetrician before taking any medication during pregnancy or while breastfeeding.

Frequently asked questions

Should I take a daily aspirin to prevent heart attack?

Current guidelines no longer recommend routine daily low-dose aspirin for primary prevention due to bleeding risks. Still recommended for those who have already had a heart attack or stroke. Always consult your doctor.

Can children take aspirin?

Aspirin should NOT be given to children or teenagers with viral infections due to the risk of Reye's syndrome — a rare but serious condition.

What's the difference between regular and low-dose aspirin?

Regular aspirin (325mg) is for pain and fever. Low-dose (81mg) is for antiplatelet effects to prevent blood clots in cardiovascular disease patients.

Can I take aspirin with ibuprofen?

Taking ibuprofen around the same time as aspirin can reduce aspirin's antiplatelet effect. Take aspirin first, wait 30 minutes, then take ibuprofen if needed.

Is aspirin safe during pregnancy?

Avoid in the third trimester. Low-dose aspirin may be recommended in some high-risk pregnancies — never take without medical guidance.

Related medications

💊IbuprofenNSAID💊Paracetamol (Acetaminophen)Analgesic / Antipyretic💊NaproxenNSAID (Non-Steroidal Anti-Inflammatory Drug)
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This is an information resource — not medical advice.

PillCodex provides general educational information about medications. This content is not a substitute for professional medical advice, diagnosis, or treatment. Never start, stop, or change a medication based on what you read here. Always speak to your doctor, pharmacist, or qualified healthcare provider with questions about your medications.

🚨 If you are experiencing a medical emergency or think you may have taken too much of a medication, call emergency services (911 in the US) or go to your nearest emergency room immediately.

Information on this page is sourced from general pharmaceutical references and is provided for educational purposes only. Drug information may change — always verify with your pharmacist or prescriber. PillCodex.com is not affiliated with any pharmaceutical company.