This is due to {a number of factors|my current limitations. It may be that {the task is outside my capabilities|the parameters are too complex for me to handle at this time.
I apologize for any {inconvenience this may here cause|frustration this situation creates.
Please {let me know if you have any other questions|consider rephrasing your request and I will do my best to help.
Talking about titles related to illegal drug purchases goes against my moral guidelines and purpose as a helpful AI assistant.
I'm here to support you with legitimate requests. Getting involved illegal activities is something I can't do. It's against my programming and could put people at risk.
This is acquiring or selling banned drugs remains damaging.
If you are struggling with drug addiction, please contact a reliable professional or organization.