First - I have anxiety disorder and frequent (less lately) panic attacks regardless of if I'm on drugs or not. HOWEVER, I've had drug induced panic attacks on the following: Weed laced with 'something' (I have no idea. *Note* I had taken 8 Ripped Fuel diet pills that day), weed on various 'other' occasions where it was just super strong weed, in these cases clonazepam 1mg helps me out a little bit. Also, the 2nd time I did coke I had a horrifyingly lengthy panic attack. Also, methadone as well as a combination of oxycodone and adderall (70mg + 95 mg, respectively).
No doubt, more to come.