What are some common side effects of taking aspirin?

Stomach irritation and nausea are recognized as common side effects of taking aspirin. Aspirin, a nonsteroidal anti-inflammatory drug (NSAID), works by inhibiting the production of certain chemicals in the body that promote inflammation, pain, and fever. However, this inhibition can also affect the stomach lining, leading to irritation. The stomach produces mucus as a protective measure against acid; aspirin can reduce this mucosal barrier, making the stomach more susceptible to irritants and acid, which can result in discomfort, nausea, and in some cases, gastrointestinal bleeding.

While other options may represent side effects associated with certain medications or conditions, they are not typically classified as common side effects of regular aspirin use. For example, headaches and dizziness can occur but are more often linked to other factors or medications, and severe allergic reactions, while possible, are rare. Shortness of breath can arise in various contexts but is not a standard side effect of aspirin when used properly.