Drug Interaction Report

Cefdinir and ferric citrate should not be taken orally at the same time. Products that contain iron may interfere with the absorption of cefdinir and reduce its effectiveness. You should take cefdinir either 2 hours before or 2 hours after the ferric citrate dose. Contact your doctor if you have reddish stools (which may indicate occurrence of the interaction) or your infection worsens. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.

Food may reduce the absorption and blood levels of ferric citrate. In addition, some oral medications can also interfere with ferric citrate absorption into the bloodstream, which may make the medication less effective in treating your condition. Likewise, ferric citrate may interfere with the absorption of other orally administered medications. You should take ferric citrate on an empty stomach at least one hour before or two hours after a meal. Your doctor may be able to prescribe alternatives that do not interact, or you may need a dose adjustment or more frequent monitoring to safely use both medications. Talk to your doctor or pharmacist if you have questions about how to take this or other medications you are prescribed. It is important to tell your doctor about all other medications you use, including vitamins and herbs. Do not stop using any medications without first talking to your doctor.