- Hematological studies: Serum electrolytes, creatinine and serum Sp. gr., and haematocrit will be determined before and after rehydration, and 24 hours after administration of the study drug (3.0 ml of blood will be required for these tests each time, i.e. a total of 9.0 ml of blood). Complete blood count, and platelet count will be done just before administration of the study drug, however, this may also be done subsequently only if clinically indicated.