I took 1 magnesium, calcium, vitamin d tablet and felt very queesy and had diahrea? is that normal?

Stop and see...: Of course, queasy and diarrhea aren't normal. But why are you taking all these supplements? For osteoporosis? If so, healthy lifestyle and exercise are still the mainstay of its care although cal + vit-d are commonly used. To decide if gi-symptom is drug-related or not, just stop and see. If you wish to use them, start with one by one in 1 week apart so you can see if drug-related.

Not common but...: Any pill, even an inactive placebo, can occ. Cause stomach upset, esp. On an empty stomach. I find capsules are better tolerated than pills. If magnesium is poorly absorbed it has a laxative effect. Some forms, like mag. Oxide, are hardly absorbed at all ; are best suited as a laxative. Magnesium glycinate, citrate ; taurate are well-absorbed ; unlikely to cause diarrhea-see http://bit.Ly/1dpai09.