Aspirin is a common medication that is used to relieve pain, reduce fever, and prevent heart attacks and strokes. The frequency of taking aspirin depends on the purpose of its use and the advice of a healthcare professional.

For pain relief and fever reduction, aspirin can be taken every 4-6 hours as needed, up to a maximum of 4 grams per day [1]. However, it is important to follow the recommended dosage and not exceed the maximum daily limit to avoid potential side effects.

For the prevention of heart attacks and strokes, the frequency of taking aspirin is different. According to the NHS, aspirin is usually prescribed once a day at a low dose of 75mg to 150mg [2]. This is because aspirin can help to prevent blood clots from forming, which can reduce the risk of heart attacks and strokes in people who are at high risk.

It is important to note that daily aspirin therapy is not recommended for everyone, and it should only be taken under the guidance of a healthcare professional. The Mayo Clinic advises that people who have a high risk of heart attack or stroke may benefit from daily aspirin therapy, but it is not recommended for those who have a low risk or who have a history of bleeding disorders or stomach ulcers [3].

In conclusion, the frequency of taking aspirin depends on the purpose of its use and the advice of a healthcare professional. It can be taken every 4-6 hours as needed for pain relief and fever reduction, up to a maximum of 4 grams per day. For the prevention of heart attacks and strokes, aspirin is usually prescribed once a day at a low dose of 75mg to 150mg. However, daily aspirin therapy is not recommended for everyone and should only be taken under the guidance of a healthcare professional.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.nhsinform.scot/tests-and-treatments/medicines-and-medical-aids/types-of-medicine/aspirin
[3] https://www.mayoclinic.org/diseases-conditions/heart-disease/in-depth/daily-aspirin-therapy/art-20046797