That statement is
really more to do with what NOT to take with harvoni, and
that means acid reducing meds such as calcium and
magnesium based over the counter meds within four hours of the harvoni dose, or anything but the
lowest doses of the
longer acting GERD meds such as omeprazole
etc. those can be taken 12 hours apart, or with the meds. But there is
a dosage restriction that needs to be checked for the med if you are using it.