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A patient with acute pharyngitis caused by group A Streptococcus (strep throat) is allergic to penicillins (non- immediate type), which of the following is NOT recommended as treatment?
Answer : B
Amoxicillin is a penicillin and so should be avoided in patients even with a non-immediate allergy. Acute treatment should be administered with one of the other listed options.
A CD4 count of 180 cells per cubic meter may be evaluated as which of these?
Answer : A
A CD4 count of 180 cells per cubic meter is considered very low -- typically an indicator that the patient has an immunocompromised state, such as AIDS. CD4 counts are a measure of healthy T-cell levels. The lower the count, the more susceptible the patient is to opportunistic infections. A normal range is between 500 and 1,500 cells.
What is the mechanism of action of the active ingredient found in Zyflo?
Answer : B
Zileuton is the active ingredient found in the medicine Zyflo; a medicine that works as a 5-lipoxygenase inhibitor. As such, zileuton inhibits leukotrienes (LTB4, LTC4, LTD4, and LTE4) formation, and is used for the maintenance treatment of asthma in patients older than the age of 12. In 2 percent of patients, it raises liver enzymes. Sinusitis and nausea are the most common side effects.
Mesna is typically administered alongside which of these chemotherapeutic agents?
Answer : C
Mesna is administered to patients taking either ifosfamide or cyclophoshamide to conjugate toxic acrolein and therefore prevent hemorrhagic cystitis (bladder bleeding).
What is the active ingredient of the medicine Lyrica?
Answer : D
Pregabalin is the active ingredient of the medicine Lyrica; a drug used to treat epilepsy, neuropathic pain, fibromyalgia and generalized anxiety disorder (GAD).
