1. Yes, definitely. In visa applications, honesty is the best policy. It is much better to tell them now than for them to find out later. If they find it themselves, they might think you are hiding information, which could lead to a permanent ban.

Prepare all your legal papers, like the fine receipt or a court document showing the case is "Closed." This proves you followed the law and the matter is finished.

2. Yes, it’s possible. Even with a valid visa, the Immigration Officer at the airport has the final say on whether to let you in.

Because you have a record in the system, they might ask you to go to a separate room for a quick interview (Secondary Inspection).

Always carry the original documents and an English/Thai translation with you. If they ask questions, you can show them immediately that your case is legally cleared.

Issues involving controlled substances (like Alprazolam) can be tricky because it depends on the officer's judgment. I will discuss your case further with legal experts here in Thailand, or you may consult with us directly (as Thai attorneys), to see if there’s anything else we can do to make your entry as smooth as possible.