how many mg are in a vial of xolair?
<answer> There are 150 mg in a vial of xolair. <context> Administer Xolair by subcutaneous injection. The injection may take 5-10 seconds to administer because the solution is slightly viscous. Do not administer more than 150 mg (contents of one vial) per injection site. Divide doses of more than 150 mg among two or more injection sites (Table 4).