stools were determined by liquid scintillation counting. Plasma and urine alkylating activity was measured by reaction with 4-(4-nitrobenzyl)pyridine. Protein binding of cyclophosphamide and plasma alkylating metabolites were deter mined by plasma ultrafiltration. Injected Cyclophosphamide distributed rapidly into 64% of body weight, and plasma Cyclophosphamide half-life in patients without pri...

Nitrous oxide is a useful short-acting adjunct, which provides some analgesia in labor and is effective for procedural analgesia in adults and children in a wide variety of settings. Its adverse effects on vitamin B12, in particular with repeat exposure, require consideration and supplementation to avoid rare, but serious toxicity leading to bone marrow suppression and neuropathy. Continuous in...