What are the contraindications of Acid Reducer,Major Acid Reducer,Tagamet,Tagamet HB?

What should I tell my health care provider before I take this medicine? They need to know if you have any of these conditions:
  • blood in your stools (black or tarry stools) or if you have blood in your vomit
  • kidney disease
  • liver disease
  • pain or trouble trying to swallow food
  • an unusual or allergic reaction to cimetidine, other medicines, foods, dyes, or preservatives
  • pregnant or trying to get pregnant
  • breast-feeding

Source: http://www.healthline.com