Almost 4 billion prescriptions for medications were written in the United States in 2010, an all-time high.
Each single dose prefilled syringe contains 300mcg (1500 IU) of Rho(D) immune globulin (human). This is the dose for the indications associated w/ pregnancy at or beyond 13 weeks unless there is clinical or laboratory evidence of a fetal-maternal hemorrhage (FMH) >15mL of Rh-positive RBCs. MICRhoGAM. Each single dose prefilled syringe of MICRhoGAM contains 50mcg (250 IU) of Rho(D) immune globulin (human).
It is safer to take that risk only once. If the only available blood for a Rh negative victim is Rh positive blood, Rhogam may be used, in very large doses of 25-30, full-size, 300 microgram ampoules, IV, per unit of blood, to neutralize the Rh sensitizing effects of the Rh positive blood.