I found a pill in my new apt. it is white round and on one side it says usv and on the other side it has a line throgh the middle and the numbers 354 on it. What is it?

vicodin

I would suggest checking out the information that you might find on the following site or take it to a pharmacist for identification and disposal. The site is good. But, to be sure, I would take it to a pharmacist. Anyone answering you here runs the risk of the ramifications if they answer and are incorrect no matter what you say the reasons are as to why you are asking.

The following site is a great place to look for identifying pills.

Pill Identifier - Drugs.com