had iron tablets through all 3 pregnancy's and suffered bad constipation now I am 59 Doc has put me on iron tablets Ferrous Sulphate 200mg twice a day but they give me the most horrendous runs even though I take them after meals as directed, the Doc says there isn't any different iron tablets I can take or a lower dose he suggested just taking 1 a day but within 2 to 3 hours of taking 1 I violently poo pale grey liquid like a jet wash sometimes I don't even make it to the loo on time as I get very short notice I cannot live my life like this has anyone any suggestions that I can try even if it means me buying something different than what he has prescribed sorry for the "too much information" but I am now desperate to sort something out myself as I am so tired due to lack of iron