I hope you locate your dad soon.

If he has bipolar illness and is taking amphetamines, he may be becoming manic.
The fact that you've heard some of this from him before is a good thing, as his current struggles are likely not a new and an additional illness.
However, you cannot know for sure until you have more info.

As Jennifer has mentioned, it's important he give permission for you to talk with his providers so you can advocate for him.

It also may be helpful to get him to an ER where they can sort out what's going on.

I wish you and your dad the best.


WC