Aspirin is a commonly used medication that can help to reduce pain, fever, and inflammation. It is also used as a blood thinner to prevent heart attacks and strokes. The recommended dosage of aspirin can vary depending on the condition being treated and the individual's medical history.

According to Drugs.com [3], the recommended dosage of aspirin for pain relief and fever reduction is 325 to 650 milligrams every four hours as needed, not to exceed 4 grams in a 24-hour period. For the prevention of heart attacks and strokes, the recommended dosage is typically lower. The Mayo Clinic [2] recommends a daily low-dose aspirin regimen of 81 milligrams for individuals who have had a heart attack or stroke, or who are at high risk for these conditions. However, it is important to note that aspirin therapy should only be started under the guidance of a healthcare provider.

It is also important to note that aspirin can have side effects, including stomach upset, bleeding, and allergic reactions. The Drug Patent Watch [1] website notes that the dosage and duration of aspirin therapy should be carefully monitored by a healthcare provider to minimize the risk of side effects.

In summary, the recommended dosage of aspirin can vary depending on the condition being treated and the individual's medical history. For pain relief and fever reduction, the recommended dosage is 325 to 650 milligrams every four hours as needed, not to exceed 4 grams in a 24-hour period. For the prevention of heart attacks and strokes, a daily low-dose aspirin regimen of 81 milligrams is typically recommended. However, it is important to start aspirin therapy only under the guidance of a healthcare provider and to monitor dosage and duration carefully to minimize the risk of side effects.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.mayoclinic.org/diseases-conditions/heart-disease/in-depth/daily-aspirin-therapy/art-20046797
[3] https://www.drugs.com/dosage/aspirin.html