 [ Symptoms ] over the counter medicine to resolve stomach pain from acid reflux  i have acid reflux issues i do pay attention to my diet and try to avoid anything that will make me feel miserable for the day but it feels like when it comes to eating it is like walking on eggshells like i do not know if something new will agree with me or not and i am sick of living this way i do not get heartburn  it is all in my stomach is there anything i can take over the counter that will help me everyday [ Disease ] i am sorry to hear your son is going through this and i am glad he sought medical attention z pack is the common name for a particular dosing regimen of azithromycin which is an antibiotic mucinex dm is the brand name of a combination medication that includes an expectorant which thins and loosens mucus in the airways and a cough suppressant it should be safe to take both the z pack and the mucinex dm at the same time in telling you this i am assuming your son has no known drug allergies there are no known interactions between azithromycin and the ingredients in mucinex best wishes to your son for a speedy recovery