I would not worry too much, but this is what I found (Perplexity)
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It is generally illegal to mail prescription medications, including Schedule III controlled substances, across state lines unless specific conditions are met. Here are the key points:
- Who Can Legally Mail Prescription Drugs:
- Only entities registered with the Drug Enforcement Administration (DEA), such as licensed pharmacies, drug manufacturers, or authorized medical practitioners, can mail prescription drugs legally147.
- The drugs must be properly prescribed and packaged according to federal and state regulations24.
- Controlled Substances:
- Mailing controlled substances like Schedule III drugs is tightly regulated under the Controlled Substances Act.
- Both the sender and recipient must be registered with the DEA unless exempt (e.g., military or law enforcement)12.
- Exceptions:
- Pharmacies with proper licensing can mail prescriptions to patients in compliance with state and federal laws. For example, some states require additional licenses for mail-order pharmacy operations69.
- Penalties for Illegal Mailing:
- Mailing prescription drugs without proper authorization can result in severe legal consequences, including package seizure, fines, or imprisonment4.
In summary, unless you are a DEA-registered entity or exempt under specific circumstances, mailing a Schedule III prescription medication across state lines is prohibited.