Daptomycin is an antibiotic used to treat serious bacterial infections, particularly those caused by Gram-positive bacteria. It works by disrupting the bacterial cell membrane, leading to cell death. Daptomycin is often prescribed for conditions like skin infections and bloodstream infections, especially when other antibiotics are ineffective. This medication is typically administered through an injection and is not suitable for treating pneumonia, as it is inactivated by lung surfactant. Patients receiving daptomycin may experience side effects such as muscle pain or weakness, so regular monitoring of muscle enzymes is recommended during treatment.