Is it safe to take both Calcium Citrate and Calcium Carbonate?

Is it safe to take both calcium citrate and calcium carbonate? I usually take Isotonix calcium but sometimes I forget in the morning or am not able to take it with me to mix up. Today I purchased some Vivactiv (calcium carbonate) to leave at work just in case I get behind in my program. I've tried taking Citrical tablets but for some reason every time I do it makes me vomit (not sure why). Should I take both or for the additional calcium all together? It would be nice if they made a shot or pill for all these daggone supplements!

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