Which Precaution Is Important to Teach a Patient Who Plans

Which precaution is important to teach a patient who plans to use over-the-counter cimetidine to help control gastroesophageal reflux disease?

A) "Watch your stools for changes that indicate bleeding such as bright red blood or a tarry appearance."
B) "Be sure to tell your health care provider that you are taking this drug."
C) "Avoid taking antacids while taking cimetidine."
D) "Always take cimetidine with a full meal."