Drug delivery systems are methods or technologies used to transport medications to specific sites in the body effectively. These systems can enhance the therapeutic effects of drugs while minimizing side effects. They can be designed to release drugs at controlled rates, ensuring that the medication is available in the bloodstream for the desired duration. Various types of drug delivery systems exist, including oral tablets, injections, and transdermal patches. Advanced systems, such as nanoparticles and liposomes, can target specific cells or tissues, improving treatment outcomes for conditions like cancer or chronic diseases. These innovations aim to optimize the way medications are administered and absorbed by the body.