In which scenario would the use of aspirin be contraindicated?

The use of aspirin is contraindicated in the presence of ulcers due to its gastrointestinal side effects. Aspirin is a nonsteroidal anti-inflammatory drug (NSAID) that can irritate the gastric mucosa, increasing the risk of bleeding and ulceration. When ulcers are present, the use of aspirin can exacerbate the situation, leading to complications such as gastrointestinal bleeding, perforation, or further ulceration. The anti-inflammatory effects of aspirin can also delay healing in an existing ulcer.

In contrast, aspirin may still be employed in chronic pain management where its anti-inflammatory properties can be beneficial, though caution is warranted with dosing and monitoring. Similarly, mild headaches can often be treated effectively with aspirin. In patients with cardiovascular disease, aspirin is commonly used for its antiplatelet effects to reduce the risk of heart attacks and strokes, and its use is generally considered safe and beneficial in this context, unless contraindicated by other factors.