Hypersensitivity to barbiturates or any element with the formulation; ; historical past of manifest or latent porphyria butabarbital will minimize the level or effect of fosphenytoin by affecting hepatic enzyme CYP2C9/10 metabolism. Use Caution/Observe. close Please affirm that you prefer to to log out of Medscape. When you Log off, https://adaml454eqv8.actoblog.com/profile