Constipated from peptobismol what should i do?

Fiber, Exercise, H2O: Assuming the pb has stopped, it can be constipating! other current medications can have constipation as side effect. Fiber (with enough water) very helpful, and you need to titrate up to full doses or you will get gassy. A healthy, fiber filled diet always good, and don't forget to drink more water. A few days of stool softener (e.g.:colace) can help jumpstart, and exercise also very helpful.