About acetyl salicylic acid
Salicylate nonsteroidal anti-inflammatory drug
Used for
- Relief of mild to moderate pain, such as headache or muscle aches
- Fever reduction
- Anti-inflammatory treatment at higher doses
Usual adult dose
For pain or fever, 325–650 mg every 4–6 hours as needed; follow the package maximum.
Usual dose in children
Do not use for children or teenagers with viral illnesses; dosing depends on age and weight.
Common side effects
- Stomach upset or heartburn
- Easy bruising or bleeding
- Stomach ulcers or bleeding
- Allergic reactions, including wheezing
Important warnings
- Seek urgent care for signs of serious bleeding, such as black stools or vomiting blood.
- Avoid in children and teenagers with chickenpox or flu-like illness due to Reye syndrome risk.
- Do not combine with other aspirin-containing products unless directed by a clinician.
- Use caution with ulcers, bleeding disorders, kidney disease, or asthma triggered by pain relievers.
Pregnancy
Avoid from 20 weeks onward unless specifically directed; avoid after 30 weeks because of fetal and labor risks.
Breastfeeding
Low-dose use is generally considered compatible, but regular or high doses may affect the infant; ask a clinician.
Interactions
- Blood thinners and antiplatelet medicines increase bleeding risk.
- Ibuprofen and other anti-inflammatory drugs can increase stomach and kidney risks.
- Methotrexate toxicity may increase.
- Alcohol increases stomach bleeding risk.
AI-generated from general medical knowledge, not from this product's official leaflet. It may be incomplete or out of date. Not medical advice — ask a pharmacist or doctor before making any decision.