Aspirin, also known as acetylsalicylic acid, is a widely used medication with various benefits. However, like any medication, it can cause side effects. Let's explore the potential side effects of aspirin based on the provided sources.

According to DrugPatentWatch, which provides information on drug patents, aspirin can cause several side effects. These include gastrointestinal issues such as stomach pain, heartburn, and nausea. It may also lead to bleeding problems, especially in individuals with a history of bleeding disorders or those taking blood thinners. Additionally, aspirin can cause allergic reactions, such as rash, itching, and swelling.

The National Health Service (NHS) in the UK also provides information on the side effects of low-dose aspirin. They mention that some people may experience stomach irritation or indigestion when taking aspirin. In rare cases, aspirin can cause stomach ulcers or bleeding in the digestive tract. Furthermore, they caution that aspirin can increase the risk of bleeding, particularly in individuals with certain medical conditions or those taking other medications that increase bleeding risk.

The Drugs.com website, which offers comprehensive drug information, highlights additional potential side effects of aspirin. These include ringing in the ears (tinnitus), dizziness, and headache. In rare cases, aspirin can lead to severe allergic reactions, such as difficulty breathing or swelling of the face, lips, tongue, or throat. They also note that long-term use of high doses of aspirin may increase the risk of kidney problems.

It is important to note that not everyone will experience these side effects, and many people can take aspirin without any adverse reactions. However, it is crucial to be aware of the potential risks and consult with a healthcare professional before starting any medication, including aspirin.

In conclusion, aspirin can cause various side effects, including gastrointestinal issues, bleeding problems, allergic reactions, and in rare cases, severe allergic reactions and kidney problems. It is essential to discuss any concerns or potential risks with a healthcare professional before using aspirin.

Sources:
[1] DrugPatentWatch: https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] NHS: https://www.nhs.uk/medicines/low-dose-aspirin/side-effects-of-low-dose-aspirin/
[3] Drugs.com: https://www.drugs.com/aspirin.html