Legal Question in Immigration Law in California

If you have prior arrests outside the U.S., then the U.S. Consulate might not issue you a visa. If you are coming from a country that participates in the Visa Waiver Pilot Program, then you should not have a problem entering,unless a criminal past comes up on the Customs & Border Patrol check upon your entry.

I would need to know what you mean by "drug addict" in order to answer your question more specifically.

Thank you.