Discussions that mention cimetidine

General Health board

I would be very careful with trying to take ranitidine with any medication. It's usually right there on the list of interacting drugs and not just because it can affect absorption. For some medications, like one I take, it can actually raise blood plasma levels of the drug. Cimetidine interacts with the same meds that ranitidine does (look up cytochrome P450 for more information on why this happens ), though famotidine is usually a little safer.