This is a scam. Don't answer the phone. You will not be arrested.
It is illegal to purchase controlled substances or any other prescription medication over the internet without a prescription.
There are on-line websites that operate out of the country, which will take orders from the US because in those countries prescriptions aren't necessary for what they offer. If the pharmacy is legit, what would happen is that Customs would discover the illegal pharmaceuticals (they are cracking down on this) and simply confiscate them. You would get some notice that they were being held by Customs. If you didn't contest that and didn't try to show up and claim them, that would be that.
However, there are on-line pharmacies that really don't sell drugs at all. They are scam sites run by thieves who try to scare you into giving up your money. Instead of getting the drugs, you will get a call from a supposed DEA agent, and he will try to tell you that if you pay a certain amount of money to someone or other, the charges against you will not be brought. Otherwise, he will claim that you are going to be arrested and face serious charges. That's extortion and nothing that a bona fide DEA agent would ever do.
These scammers get your personal information from the "pharmacy's" site. They also have your credit card details, so you should cancel your card as well and take any other precautions you have to in order to prevent you from being an identity theft victim as well.
The next time the guy calls, tell him that on advice of counsel you should not have any further discussion on this matter. Ignore the fear tactics, get off of the phone, and report whatever information you have about this site to your state attorney general's office and to the FBI's Internet Crime Complaint Center.
If I've helped, please click the green Accept button so I can get credit for my work.
This thread will not close and you can always use it to get clarification.This is informational only and is NOT legal advice. There is no attorney-client relationship. You are advised to consult an attorney in your state for specific legal advice.