For those that have high BP I make sure not to do any exercises with their hands above their heart. That can increase BP, especially when using weights. When stretching, it’s ideal to not allow their head to go below the heart. This can cause dizziness and other issues. Down dog, standing toe touches need be modified or eliminated.
Educating a client is imperative too. Many believe since they’re on medication they no longer have high BP. This could be a dangerous scenario if they ignored above stipulations.
Medical clearance is a must before working with them.
I hope this helps!