Take your ferrous sulfate dose 2 to 6 hours before or after taking any of the following:
an antacid;
an antibiotic; or
a laxative.
This list is not complete. Other drugs may interact with ferrous sulfate, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
 Ferrous sulfate drug interactions (more detail)
