Fetal hydantoin syndrome, also called fetal dilantin syndrome is a group of defects caused to the developing fetus by exposure to teratogenic effects of phenytoin. Phenytoin reference guide for safe and effective use from the American Society of Health-System Pharmacists (AHFS DI). Advice and warnings for the use of Phenytoin during pregnancy. FDA Pregnancy Category D - Positive evidence of risk Congenital adrenal hyperplasia (CAH) is a group of inherited disorders of the adrenal gland, small triangular organs located on top of the kidneys that secrete hormones. Find more information about your child's condition, and the treatment options available at Children's Hospital. 23-3 as Turner syndrome and is associated with webbing of the neck, lymphedema of the hands and feet, and later in life short stature and infertility. The phenytoin test is used to optimize drug therapy, monitor the amount of phenytoin in the blood, determine whether drug concentrations are in the therapeutic range, and to monitor patient adherence. Phenytoin Injection BP should be injected slowly and directly into a large vein through a large-gauge needle or intravenous catheter. It must be administered slowly. Phenytoin Sodium Flynn Hard Capsules contain phenytoin sodium. Although 100mg of phenytoin sodium is equivalent to 92mg of phenytoin on a molecular weight basis, these molecular equivalents are not necessarily biologically equivalent. Classification. Much of the language used for describing congenital conditions predates genome mapping, and structural conditions are often considered separately from other congenital conditions.