Prozac (Fluoxetine Hydrochloride) Is a Selective Serotonin Reuptake Inhibitor (SSRI)

question 92

Multiple Choice

Prozac (fluoxetine hydrochloride) is a selective serotonin reuptake inhibitor (SSRI) used to treat depression. Its function in the brain can be studied by using radiolabeled ¹⁸F instead of natural abundance fluorine in its structure. The positron emission is detected by a PET scan. The half-life of ¹⁸F is 109.7 minutes. If radiolabeled Prozac were administered to a patient for a PET scan at 8:00 A.M. on Monday, at what time would its activity reach 10% of the original activity?

• A)9:49 A.M., Monday
• B)9:07 P.M., Friday
• C)10:42 A.M., Tuesday
• D)2:04 P.M., Monday
• E)6:07 P.M., Monday

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