How often should you use Merthiolate?

Adults and children 2 years and older: clean the affected area, apply a small amount on the area 1 to 3 times daily, may be covered with a sterile bandage. If bandaged, let dry first. Children under 2 years of age: Consult a doctor.

Why was Merthiolate banned?

Mercurochrome and another popular antiseptic of a generation or two ago, Merthiolate, contained mercury, that liquid metal health authorities have decided is toxic enough in large amounts to ban its general use, even enclosed in glass thermometers.