Aspirin is a widely used medication that is generally safe for most people, but some individuals may experience allergic reactions to it. An aspirin allergy is a type of drug allergy that can cause symptoms ranging from mild to severe. Some common symptoms of an aspirin allergy include hives, itching, swelling, and difficulty breathing. In rare cases, an aspirin allergy can cause anaphylaxis, a life-threatening allergic reaction.

According to the sources provided, aspirin allergies are relatively uncommon, affecting less than 1% of the general population. However, individuals who are allergic to aspirin may also be allergic to other nonsteroidal anti-inflammatory drugs (NSAIDs), such as ibuprofen and naproxen. This is known as cross-reactivity and occurs because these drugs have similar chemical structures.

If you suspect that you may have an aspirin allergy, it is important to speak with a healthcare professional for proper diagnosis and treatment. Treatment may involve avoiding aspirin and other NSAIDs, and using alternative pain medications that are safe for individuals with aspirin allergies.

Sources:
[1] https://www.drugpatentwatch.com/p/tradename/ASPIRIN
[2] https://www.mayoclinic.org/diseases-conditions/drug-allergy/expert-answers/aspirin-allergy/faq-20058225
[3] https://www.allergy.org.au/patients/drug-allergy/allergic-reactions-to-aspirin-and-other-pain-killers