Question: how long will diarrhea last after panacur?
Answer: 6 days of Panacur will kill the giardia protozoa and then a repeat of 6 days of Panacur after 21 days to insure no new cysts re-multiply. That was it!!! After just a few days on Pancur my dog's diarrhea was GONE and never returned after battling it for 6 weeks.