This Serum represents a solution in normal saline of the tetanus antitoxins derived from the blood plasma of a properly immunized horse. It has a potency of not less than 100 units per mil.

Note its appearance......................... Color ................................................................... Odor ............................................................

Antitetanic Serum is best used as a prophylactic for tetanus in doses of 1000 units. The possibility of a curative result is remote if the disease has become established. When treated early, a "curative" dose of 10,000 units may be essayed.

Each of the above Sera is official in three forms: the plain Serum, the Purified Serum, and the Dried Serum. The preferable preparation is the one selected for study.