Aspirin is a widely used medication that has been in use for over a century. It is primarily used to relieve pain, reduce fever, and prevent blood clots. However, like any medication, aspirin has potential side effects that should be taken into consideration before use.

According to the Mayo Clinic [2], common side effects of aspirin include stomach pain, heartburn, nausea, and vomiting. These symptoms can be exacerbated if aspirin is taken on an empty stomach. In some cases, aspirin can also cause ulcers or bleeding in the stomach or intestines. These symptoms can be serious and require immediate medical attention.

Aspirin can also increase the risk of bleeding, especially if taken in high doses or for an extended period. This can be particularly concerning for people who are already at risk of bleeding, such as those with bleeding disorders or those taking blood-thinning medications.

In rare cases, aspirin can cause an allergic reaction. Symptoms of an allergic reaction can include hives, difficulty breathing, and swelling of the face, lips, tongue, or throat. If you experience any of these symptoms after taking aspirin, seek medical attention immediately.

It is important to note that aspirin should not be given to children under the age of 16, as it has been linked to a rare but serious condition called Reye's syndrome [3]. Additionally, aspirin should be used with caution in people with asthma, as it can trigger asthma attacks.

In conclusion, aspirin is generally safe when used as directed. However, it is important to be aware of the potential side effects, especially if you are taking aspirin on a regular basis or in high doses. If you experience any concerning symptoms after taking aspirin, seek medical attention immediately.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.mayoclinic.org/drugs-supplements/aspirin-oral-route/side-effects/drg-20152665?p=1
[3] https://www.nhsinform.scot/tests-and-treatments/medicines-and-medical-aids/types-of-medicine/aspirin