A 16-year-old client sustains a severe head injury in a motor vehicle accident. He’s admitted to the neurologic unit and subsequently develops neurogenic diabetes insipidus

A 16-year-old client sustains a severe head injury in a motor vehicle accident. He’s admitted to the neurologic unit and subsequently develops neurogenic diabetes insipidus. Dr. Fernandez prescribes vasopressin (Pitressin), 5 units subcutaneously (S.C.) twice a day. When vasopressin is given S.C., it begins to act within:
a. 5 minutes
b. 1 hour
c. 2 hours
d. 4 hours

Answer B. When vasopressin is given S.C., it begins to act within 1 hour. Its duration of action is 2 to 8 hours.

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