n :  a white anhydrous salt MgSO₄ that occurs naturally in hydrated form as Epsom salts and that in the hydrated form MgSO₄·7H₂O is administered in aqueous solution by injection to treat magnesium deficiency, to control convulsions associated with eclampsia, and to treat symptoms (as hypertension and convulsions) associated with nephritis in children .
 
 
 
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