To treat headaches, back pain or fever, most of us have reached for ibuprofen at one point or another. But we often have to take doses every four to six hours if the pain warrants it. Now scientists are working on a way to package the commonly used drug so it can last longer. Their approach, reported in ACS’ journal Molecular Pharmaceutics, could also be used to deliver other drugs orally that currently can only be taken intravenously.