hypocalcemia, abdominal pain, constipation
, diarrhea, dyspepsia, flatulence, nausea, vomiting.
*Less common [1/100;1/1000]: Hyperparathyroidism, eructation, stomatitis, esophagitis, gastro-intestinal NOS, edema, loose stools, dental disease, dizziness, fatigue, etc...
Data from Fosrenol (Lanthanum carbonate): "these side-effects decrease in time and if medicine is taken during meals." Study on 1745 human patients that used it over a year.
It may work, so good luck !!!