Don't forget that if you're taking these, chances are something has gone wrong in your vicinity that you can't get into medical care. Breakdown of health care likely means breakdown of other necessities. So... between the stress of whatever "event" has taken place, potential malnutrition if it turns long term, and any other issues (poor water, poor sanitation, etc), something benign could turn much more hazardous, simply due to a depressed immune system.

Some things, esp diarrhea and CAP, could turn from uncomfortable to hazardous/fatal fairly easily in such a situation.