Aspirin
Generic Name: Aspirin
Uses & Medical Indications
Pain relief, prevent heart attacks
Pain, fever, cardiovascular prophylaxis
Work Mechanism & Pharmacology
Patient Overview of Work Mechanism
At low doses, Aspirin permanently deactivates the sticky chemical signals inside platelets, keeping blood flowing smoothly and preventing heart attacks and ischemic strokes.
Clinical Mechanism of Action (MoA)
Irreversible covalent inhibitor of cyclooxygenase-1 (COX-1) and cyclooxygenase-2 (COX-2) via selective acetylation of serine residue 529 in COX-1. In platelets lacking nuclei, permanent COX-1 inactivation prevents thromboxane A2 (TXA2) generation throughout the platelet's 7-10 day lifespan, inhibiting platelet aggregation and arterial thrombosis.
Dosage & Administration Guidelines
81-325 mg daily for prophylaxis
Avoid in children (Reye's syndrome)
Use with caution, bleeding risk
4000 mg/day for pain
Avoid in severe failure
Avoid in severe disease
Side Effects & Safety Warnings
Dyspepsia, bleeding
GI ulceration, anaphylaxis
Bleeding disorders, asthma with nasal polyps
Increased risk of GI bleeding
Interactions (Drugs, Food & Alcohol)
Other NSAIDs, Anticoagulants
N/A
Increases bleeding risk
Identified Clinical Drug Interactions for Aspirin:
Significantly increased risk of severe, life-threatening gastrointestinal hemorrhage and bleeding.
Increased susceptibility to upper gastrointestinal bleeding and mucosal ulceration.
Antagonism of Aspirin Irreversible Cardioprotection
Additive Antiplatelet Action & Enhanced Bleeding Risk
Pregnancy & Breastfeeding Safety
Avoid in 3rd trimester
Use caution
Patient Counseling & Practical Advice
Take with food to reduce GI upset
Take as soon as remembered
Bleeding signs
Frequently Asked Questions
When to Seek Urgent Medical Attention
Vomiting blood, sudden severe headache, confusion, weakness on one side of the body.
Content for Aspirin was synthesized from standardized public health monographs, official pharmacopoeias, and health authorities:
- AHA / American College of Cardiology — Guidelines on the Primary and Secondary Prevention of Cardiovascular Disease
- US Preventive Services Task Force (USPSTF) — Aspirin Use to Prevent Cardiovascular Disease
The information provided on this website is for educational purposes only and is not intended as a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of a qualified healthcare provider with any questions you may have regarding a medical condition.