bacterial infection
"Dr prescribed clindamycin for an infection.  Did not know that laying down after a dose of this would feel like your insides were burning up. Worst heartburn I have had.  Of course this was due to the fact that I was trying to be diligent and take them every 8 hrs. causing me to take them in the middle of the night. Good to know that others have this problem. Like others, I was scared I was having a heart attack."