DailyMed - DOXYCYCLINE- doxycycline hyclate tablet,
2020-6-17 · Hyperpigmentation of the thyroid has been produced by members of the tetracycline class in the following species: in rats by oxytetracycline, doxycycline, tetracycline PO 4, and methacycline; in minipigs by doxycycline, minocycline, tetracycline PO 4, and methacycline; in dogs by doxycycline and minocycline; in monkeys by minocycline.
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