What is the best way to handle traffic stops involving alcohol or drugs?

Here, too, it goes without saying that you have the right to remain silent and are not required to make any statements regarding the type or quantity of any beverages or substances consumed.

Am I required to take sobriety tests?

You should also under no circumstances participate in voluntary (!) sobriety tests, such as the finger-to-finger test or the finger-to-nose test.

These tests can only be used against you, not in your favor!