UpToDate's Drug Interaction feature links to a Lexi-Comp product, Lexi-Interact Online. This is a comprehensive drug-to-drug, drug-to-herb, and herb-to-herb interaction analysis program. To access, select "Drug Interaction" at the top right corner of the screen:

To use Lexi-Interact Online, enter the drug or herb you are interested in and select the best option from the list that appears under the search bar:
