Aspirin is a medication that is used to relieve pain, reduce inflammation, and prevent blood clots. The recommended dosage of aspirin depends on the reason for taking it and the individual's medical history.

According to Drugs.com [3], the recommended dosage for pain relief is 325 to 650 mg every four hours as needed, not to exceed 4 g in 24 hours. For reducing fever, the recommended dosage is 325 to 650 mg every four to six hours as needed, not to exceed 4 g in 24 hours. For reducing the risk of heart attack or stroke, the recommended dosage is usually lower, ranging from 75 to 162 mg per day [3].

The Mayo Clinic [2] recommends that individuals should talk to their doctor before starting daily aspirin therapy, as it is not appropriate for everyone. For those who are advised to take aspirin for heart health, the recommended dosage is typically between 81 mg and 325 mg per day [2].

It is important to note that aspirin can have side effects, including stomach bleeding, so it is important to take it as directed and under the guidance of a healthcare provider [2].

In conclusion, the recommended dosage of aspirin varies depending on the reason for taking it. For pain relief and reducing fever, the recommended dosage is 325 to 650 mg every four to six hours as needed, not to exceed 4 g in 24 hours. For reducing the risk of heart attack or stroke, the recommended dosage is usually lower, ranging from 75 to 162 mg per day. It is important to talk to a healthcare provider before starting daily aspirin therapy and to take aspirin as directed to avoid potential side effects.

Sources:
[2] Mayo Clinic. (2021). Daily aspirin therapy: Understand the benefits and risks. https://www.mayoclinic.org/diseases-conditions/heart-disease/in-depth/daily-aspirin-therapy/art-20046797
[3] Drugs.com. (2021). Aspirin Dosage. https://www.drugs.com/dosage/aspirin.html