Constipation, but I use psyllium husks in my morning water/Emergen C and it helps. My doctor and I decided to try it. I am an unemployed graduate student. I had to quit working when I got this virus. I am living off student loans, so even $100 for medicine like a compounded Naltrexone is too much. It is helping but I woke up feeling terrible this morning. Double edged sword here. I do when I feel like doing, thanks to meds...but I wake up the next day feeling poisoned from the fatigue and post-exertion malaise. It is like a nightmare groundhog day, but I am still here and it could always be worse.