I have a yellow oval pill that has 650 on one side and W O on it and I'd like to know what it is

Where did you find it? Take it to your pharmacist for proper identification and disposal.

Where did you find this pill?

It is an extremely strong pain reliever that has the danger of causing seizures if you take it when not prescribed. If it has not been prescribed to you or someone in your home get rid of it.

A buddy of mine found it and I took it away from him. I didn't know what it was when he asked so I took it...

Good thinking, I would dispose of it and say you lost it if he finds out, it's a very dangerous kind of pill, if someone gave it to him saying it's a recreational drug they lied.

All right, what's the name of it?

It's called Ultracet, you can find some info at the link below.

Ultracet Drug Information

Again, this is not something to be taken by anyone for any reason and should not be kept.