Ferrous sulfate
"I was prescribed to take 300mg a day, along with stool softeners because this product is know to cause constipation. Thankfully I waited to take the stool softeners because I have been taking this medication for 6 days and have been glued to the toilet for 2 of them. I haven't noticed any positive effects from this medication. A full list of my side effects so far have been: feeling like I'm going to throw up, my stomach gurgling a lot, painful gas, and very strong diarrhea (very watery about 4 times in the morning then 5/6 during the day time)."