placebo + aspirin

This is a combination of two agents used in clinical trials and research settings—placebo (an inert substance with no therapeutic effect) and aspirin (acetylsalicylic acid), a nonsteroidal anti-inflammatory drug (NSAID) with analgesic, antipyretic, anti-inflammatory, and antiplatelet properties. Placebo is used as a control to assess the efficacy and safety of active drugs. Aspirin works primarily by irreversibly inhibiting cyclooxygenase enzymes (COX-1 and COX-2), leading to decreased synthesis of prostaglandins and thromboxane A2, which results in reduced pain, inflammation, fever, and platelet aggregation. The combination "placebo + aspirin" typically refers to study arms where both are administered together or compared for their effects on outcomes such as cardiovascular events or cancer recurrence[5][4][3].