What vitamins Cannot be taken with doxycycline?

Use caution with these medications while taking doxycycline: Minerals and multivitamins (such as calcium, magnesium, zinc, iron) and Antacids, ulcer medications (such as milk of magnesia, TUMS®, Gaviscon®, sucralfate): o These will bind to doxycycline and reduce the effect of the antibiotic.

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