Fast reliefheadache with upset stomachfor fast and effective relief from headache with upset stomach particularly when due to too much to eat or drinkalka seltzer is especially effective when taken before bed and again in the morningalso suitable for relief of general pain such as migraine and period pains rheumatic and muscular pain and the symptomatic relief of colds and flualka seltzer is a registered trademark of bayer healthcare llc usa