Your husband and you just got back from MX and he has had diarreah ever since you left now it has turned black what does that mean?

There is a lot of flu viruses going around the nation this year. People take various over the counter medicines for diarrhea, and one, the pink stuff that starts with the letter "P" will cause diarrhea output to turn black. This quite normal and no real cause for alarm. If the diarrhea continues past the 3rd or 4th day, you should see your doctor.