I'd also advise against. The whole process of amalgam removal is hard on the body. If you do choose to run and you feel sick, exhausted or "just not up to it" in the process, please listen to your body. If you rest now you will be healthy to run another day.

By the way, I loaded up on many grams of vitamin C on the day of amalgam removal, in order to help protect my body from additional mercury toxicity. It didn't make the anaesthetic any less effective.