Sarcoids. Sarcoids are a benign tumour that grow on the skin of susceptible horses. While they do not spread to any other organ in the horseâs body, they can certainly spread throughout the skin.arcoids. Sarcoids are a benign tumour that grow on the skin of susceptible horses. While they do not spread to any other organ in the horseâs body, they can certainly spread throughout the skin.
List pyrithione zinc topical side effects by likelihood and severity. The following side effects are associated with pyrithione zinc topical: Common side effects of pyrithione zinc topical: Skin IrritationSevere.
1 Do not get pyrithione zinc shampoo in your eyes, nose, or mouth. If you get pyrithione zinc shampoo in your eyes, rinse immediately with cool water.  If your symptoms do not improve with regular use or if they become worse, consult your doctor.