The rehearsed standard response, practiced by Arnold and Cutler as well, goes like this:
1. Start to point out that drugs doesn't really matter (also known as "The Finishing Touch" tactic) and that food and diet is number one.
2. If pressed further - use any diversion you can come up with on the spot; protein, creatine, saunas, hyperbaric chambers. Anything goes.
3. Crossover into talking about something completely different in hopes of tiring the interviewer and make him lose focus.
4. Repeat steps 1 to 3 until interview time is over (Don't worry, there's always very limited time dedicated to this since it is about bodybuilding).