Will Benadryl help with allergic reaction to macrobid chest tightness?
Answer by Melissa101010 (4399) Benadryl will help with allergic reactions but probably not for your chest tightness. You need to go to your closest emergency room as soon as possible for chest tightness. It could be more than just an allergic reaction. You should see your family physician to let him or her know that you are having this problem.