The standard aspirin dose for adults to lower a fever or relieve pain is between 325 milligrams and 650 milligrams. For children, the recommended dosage to alleviate pain is between 10 milligrams and 15 milligrams, explains Drugsdb.com
The recommended maximum dosage per day for both adults and children is 4 grams unless a physician recommends a different dosage, says Drugsdb.com. Aspirin is a nonsteroidal anti-inflammatory drug that helps prevent stroke and heart attack, lower fevers, alleviate pain and inflammation, and relieve colds, flu, migraines, muscle pains and headaches. Aspirin is beneficial to people suffering from coronary artery disease and those who have had ischemic stroke or received bypass surgery, notes WebMD.