Oral ivermectin is used to treat a variety of infections caused by various organisms. There is some evidence that oral ivermectin can be an effective treatment for demodex mites.
References
Clinical treatment of ocular Demodex folliculorum by systemic ivermectin
Holzchuh FG, Hida RY, Moscovici BK, Villa Albers MB, Santo RM, Kara-José N, Holzchuh R.
American journal of ophthalmology
2011 Jun;151(6):1030-1034.e1. doi: 10.1016/j.ajo.2010.11.024. Epub 2011 Feb 19.
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Evaluation of the efficacy of oral ivermectin in comparison with ivermectin-metronidazole combined therapy in the treatment of ocular and skin lesions of demodex folliculorum
Salem DA, El-Shazly A, Nabih N, El-Bayoumy Y, Saleh S.
International Journal of Infectious Diseases
2013 May;17(5):e343-7. doi: 10.1016/j.ijid.2012.11.022. Epub 2013 Jan 5.
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