Doxycycline and Ferric citrate interaction
Doxycycline and Ferric citrate: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Ferric citrate label · effective 2024-06-23
…Glimepiride Levofloxacin Losartan Metoprolol Pravastatin Propranolol Sitagliptin Warfarin Oral drugs that have to be separated from Ferric Citrate Tablets and meals Dosing Recommendations Doxycycline Take at least 1 hour before ferric citrate tablets Ciprofloxacin Take at least 2 hours before or after ferric citrate tablets Oral medications not listed in Table 2 There…
From the Doxycycline (Doxycycline Hyclate) label · effective 2026-06-30
Absorption of tetracyclines, including doxycycline hyclate is impaired by antacids containing aluminum, calcium, or magnesium, bismuth subsalicylate and iron-containing preparations.
Antacids and Iron Preparations Absorption of tetracyclines, including doxycycline hyclate is impaired by antacids containing aluminum, calcium, or magnesium, bismuth subsalicylate, and iron-containing preparations.
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Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.