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It seems that Ichthammol is acceptable as an anteseptic used in small quanties. The only concern I would have is does contain a small percentage of Zinc Oxide which can be toxic if taken internally in large quantities. Ichthammol is widely known as a veterinary ointment for soothing abrassions or injuries. One of the active ingredients is Chloroxylenol is a disinfectant of low toxicity as well as Coal Tar. If used sparingly this should not cause any problems. Joan
I applied Frontline plus on my mail 10 year old cat