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0. Phenobarbital is a barbiturate and will cause a positive test result for barbiturates. Phenytoin (Dilantin) is not a barbiturate; however a metabolite, p-hydroxyphenytoin has minimal cross reactivity on the initial screening test. There is no interfe.... Phenobarbital is a barbiturate and will cause a positive test result for barbiturates. Phenytoin (Dilantin) is not a barbiturate; however a metabolite, p-hydroxyphenytoin has minimal cross reactivity on the initial screening test. There is no interfe...
Barbituric acid, the basic structure of all barbiturates. Barbiturates are drugs that act as central nervous system depressants, and can therefore produce a wide spectrum of effects, from mild sedation to total anesthesia.They are also effective as anxiolytics, hypnotics, and anticonvulsants.Barbiturates also have analgesic effects; however, these effects are somewhat weak, preventing barbiturates from being used in surgery in the absence of other analgesics (opioids or volatile anesthetics such as halothane).They have addiction potential, both physical and psychological.arbituric acid, the basic structure of all barbiturates. Barbiturates are drugs that act as central nervous system depressants, and can therefore produce a wide spectrum of effects, from mild sedation to total anesthesia.