Yes, log into your company's specific portal for mydrugcosts, e.g. mycompany.mydrugcosts.com. The myDrugLists feature allows you to manage one or more lists of medications. This can be used for your own medications or those of your dependents.
To add drugs, search a drug, and in the search results, under "Medication Settings", click the "Add To List".
To access your myDrugList, click on the "Planning Tools" tab and click "myDrugList".
Here is the myDrugList screen: