No other precautions, basically just go home and resume your normal activities, although I wasn't able to ask about weed.

I have chronically low, below average blood pressure. I was not given any instructions whatsoever about things to avoid.

I am thinking that this neurosurgeon wouldn't have sent me home without precautions if he felt I was in any danger. He's seen basically everything and I doubt he'd want to risk tarnishing his rep or a malpractice suit by ignoring a dangerous condition in a patient. However, I am a hypochondriac with severe health anxiety, so I am super careful.

I am trying to get a second opinion from a different neurosurgeon, although to do so will take me many months, lots of financial paperwork and hours of driving. I guess until I am more certain about what is going on I will continue to abstain from smoking. Which sucks. But, as you said, it's not worth the risk...