I have been on slow release metformin for a while now 1000 twice a day my bloods still ain't coming down doc has prescribed me linagliptin now too can you take metformin and linagliptin at the same time or is it better to take them seperate and any precautions I should be taking with it please if this doesnt work he is on about adding other drugs or insulin which I'm trying to avoid thanks in advance