NABP North American Pharmacist Licensure Examination NAPLEX Exam Questions

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Total 155 questions
Question 1

Proportion of people in a population who have a particular disease at a specified point in time or over a specified period of time is definition as which of the following?



Answer : B

Incidence rate = New reported cases / summed person-years of observation (avg population during time interval) Prevalence = Cases in a population in a given time period / total population at that time.


https://www.cdc.gov/ophss/csels/dsepd/ss1978/lesson3/section2.html http://www.healthknowledge.org.uk/public-health-textbook/research-methods/1a-epidemiology/numerators- denominators-populations

Question 2

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.


Question 3

What vitamin should the a patient receive to avoid Wernicke- Korsakoff syndrome?



Answer : A

Thiamine should be administered to prevent Wernicke's encephalopathy.


http://www.uptodate.com/contents/management-of-moderate-and-severe-alcohol-withdrawal-syndromes

Question 4

An order is received for heparin 18 units per kg per hour on a patient whose weight is 125lb. The IV bag comes as a concentration of 50 units /mL. Calculate the infusion rate in terms of mL/hr.



Answer : D

125 lb =56Kg, 56Kg [18 units/ 1 kg] = 1022.72 units/hr, 1022.72 units [1 mL/50 units] = 20.45 mL/hr


Question 5

In Normal distribution, what percentage of the sample is found within 2 standard deviation of the mean?



Answer : B

In a normal distribution sample, within 1 standard deviation 68% of the sample falls within 1 standard deviation, 95% within 2 standard deviations, and 99.7% within 3 standard deviations of the mean.


http://www.bmj.com/about-bmj/resources-readers/publications/statistics-square-one

Question 6

LN is 84 YOM who is in hospital for a back surgery. His height is 5 feet and 4 inches, weight 85 kg and NKDA.

His past medical history includes hypertension, diabetes mellitus, major depression, hypothyroidism and chronic back pain. Post-op day 1, LN's medication includes Dexamethasone 8mg iv q6h with taper dosing, Ondansetron 4mg iv q6h prn for N/V, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20mg iv q12hr, Metoclopramide 10mg iv q6h, Metformin 500mg po bid, D51/2NS with 20K at 125mls/hour and Hydromorphone PCA at 0.2mg/hour of basal rate, demand dose 0.1mg. lock-out

every 6min, one hour limit 2.2mg/hour. Pertinent morning labs includes serum creatinine 1.4mg/dl, Mg 1.5mg/ dl, K 5.0mmol/L, Na 135mmol/L.

What is the reason for holding metformin in patients with reduced renal function?



Answer : B

Metformin is held in patients with reduced renal function due to an increased risk of lactic acidosis. Metformin has a Boxed Warning for lactic acidosis, which is a rare but serious metabolic complication. Lactic acidosis can occurs due to an accumulation of metformin (5 mcg/mL or more). It is fatal in about 50% of cases. Lactic acidosis has also been reported to occur in those with diabetes who have significant renal function impairment. Lactic acidosis occurs when there are elevated blood lactate levels of 5 mmol/L or more, decreased blood pH, electrolyte disturbances with an increased anion gap, and an increased lactate/pyruvate ratio. Normal lactic acid level <2.0 mmol/L.


Question 7

LN is 84 YOM who is in hospital for a back surgery. His height is 5 feet and 4 inches, weight 85 kg and NKDA.

His past medical history includes hypertension, diabetes mellitus, major depression, hypothyroidism and chronic back pain. Post-op day 1, LN's medication includes Dexamethasone 8mg iv q6h with taper dosing, Ondansetron 4mg iv q6h prn for N/V, Levothyroxine 0.075mg po daily, Lisinopril 10mg po daily, Citalopram 20mg po daily, Docusate sodium / Senna 1 tab po twice a day, Bisacodyl 10mg suppository daily prn for constipation, Famotidine 20 mg iv q12hr, Metoclopramide 10mg iv q6h, Metformin 500mg po bid, D51/2NS

with 20K at 125 mls/hour and Hydromorphone PCA at 0.2 mg/hour of basal rate, demand dose 0.1mg. lock-out every 6min, one hour limit 2.2mg/hour. Pertinent morning labs includes serum creatinine 1.4mg/dl, Mg 1.5mg/ dl, K 5.0mmol/L, Na 135mmol/L. Day 3 post-operation LN's pain was much better and only used 3 mg of hydromorphone in the 24hrs.

Physician wants to change to oral morphine. What would be your best recommendation?



Answer : E

Since LN used 3 mg of hydromorphone, this would be equivalent to a total of morphine 60 mg po daily. Since you would start with 70-80% of that dose, Morphine 15mg ER po q12hr and morphine 5mg po q6h prn breakthrough pain would be appropriate regimen.


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Total 155 questions