almagate almagate almagate (trade name almax) is an aluminium- and magnesium-containing antacid. it was first described in 1984. almagateclinical dataahfs/drugs.cominternational drug namesroutes ofadministrationoralatc codea02ad03 (who) identifierscas number66827-12-1pubchem cid71749chemspider64792 yunii568z59h7zjkeggd02821 ycomptox dashboard (epa)dtxsid30216935 chemical and physical dataformulaal2mg6(oh)14(co3)2 · 4 h2omolar mass314.99 g/mol3d model (jsmol)interactive image smiles .......c()=o.....o.o inchi inchi=1s/ch2o3.al.3mg.9h2o/c2-1(3)4;;;;;;;;;;;;;/h(h2,2,3,4);;;;;9*1h2/q;+3;3*+2;;;;;;;;;/p-9 ykey:mteomewvdvptnn-uhfffaoysa-e y (verify) adverse effects almagate is well tolerated. in a clinical trial, the most common adverse effects were diarrhea and nausea.