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DRUG ICARDS
Aspirin
| Question | Answer |
|---|---|
| Aspirin mechanism of action | Acetylsalicylic acid has antiplatelet, antipyretic, anti inflammatory and analgesic effects. -inhibits the enzyme cyclooxygenase which results in a reduction in the formation of prostaglandins and thromboxane |
| Indications | -Myocardial ischemia -STEMI |
| Contraindications (2) | -Know severe allergy -third trimester of pregnancy |
| Cautions (3) | -know bleeding disorder -clinically significant bleeding known worsening of bronchospasm with NSAIDS |
| Dose | 300mg |
| common adverse effects | -increased bleeding -indigestion, gastrointestinal ulceration/ bleeding associated with long term use |
| Onset | 30-60 minutes |
| Duration | 3-5 days for the antiplatelet activity. platelets exposed to aspirin are impaired for the like of the platelet which is 7-10 days. Approx 10% replaced each day |
| Pharacokinetics | Absorption occurs in the stomach and small intestine. Metabolised in the liver no significant effects from liver impairment on acute administration |
| common interactions | displaces warfarin from the binding sites and increases the activity of warfarin. |