BC powder is an over-the-counter pain reliever that contains a combination of aspirin and caffeine. It is commonly used to alleviate headaches, muscle aches, and other minor pains. The powder form allows for quick absorption, making it effective for fast relief. Typically, BC powder is mixed with water before consumption. It is important to follow the recommended dosage and consult a healthcare professional if you have any underlying health conditions or are taking other medications. Users should also be aware of potential side effects, such as stomach upset or allergic reactions to aspirin.