I took Zegerid for about 1 week. I didn't realize it is like Prilosec. I had terrible chest pains and a cough with it so had to discontinue. It took care of the acid well but I couldn't deal with the tightening of the chest. Anything that has the same or similar ingredients in prilosec does this to me. I ended up on Aciphex which works well. Prevacid is OK too but not as strong for me as Aciphex. Everyone is different though and Zegerid may work best for you.