Take your dacomitinib dose 6 hours before or 10 hours after taking any of the following:
1.an antacid; or
2.a stomach acid reducer (such as Tagamet, Pepcid, Zantac).
This list is not complete. Other drugs may affect dacomitinib, including prescription and over-the-counter medicines, vitamins, and herbal products. Not all possible drug interactions are listed here.
