Aspirin
300 mg chewed for suspected heart attack, 300 mg daily for 2 weeks after ischaemic stroke (once bleed excluded), then 75 mg daily for prevention.
Common brands in Pakistan: Disprin, Loprin. Brand availability changes; check with your pharmacy.
On this page
Dose
| Indication | Dose |
|---|---|
| Suspected ACS | 300 mg chewed once, then 75 mg daily |
| Ischaemic stroke (after CT excludes bleed) | 300 mg daily for 2 weeks, then long-term antiplatelet |
| TIA | 300 mg immediately, then specialist plan |
| Secondary prevention | 75 mg daily |
| Pre-eclampsia prevention (high risk) | 75–150 mg at night from 12 weeks to birth |
Cautions
- Avoid in suspected aortic dissection, active bleeding, dengue, children under 16 (Reye's syndrome).
- Stomach ulcers and bleeding: add a PPI if at risk.
Frequently asked questions
How much aspirin is given in a heart attack?
300 mg chewed as soon as ACS is suspected, unless contraindicated.
Used in these guides
Sources
Doses on this page are typical doses from the sources above. Always confirm with a current drug reference, the product leaflet and your hospital protocol, especially in children, pregnancy and kidney or liver disease.
For FCPS Part 1
Revising for FCPS Part 1? Aspirin is covered in our textbook chapter Analgesics and NSAIDs, with practice MCQs.