This topic contains a solution. Click here to go to the answer

Author Question: A vial of phenytoin sodium (Dilantin) contains 100 mg of drug in a total of 2 mL. How many ... (Read 22 times)

mcmcdaniel

  • Hero Member
  • *****
  • Posts: 550
A vial of phenytoin sodium (Dilantin) contains 100 mg of drug in a total of 2 mL. How many milligrams of phenytoin sodium is contained in 0.5 mL of solution?
 
  a. 2.5 mL c. 25 mg
  b. 1.0 mg d. 50 mg

Question 2

A dose of 0.25 mg of a drug is equivalent to:
 
  a. 250 mcg. c. 2.5 mcg.
  b. 0.00025 mcg. d. 25 mcg.



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Answer to Question 1

ANS: C

Feedback
A Incorrect: This would yield 125 mg.
B Incorrect: This would be in 1/50 mL.
C Correct: Set up as a fractional dosage problem with 100 mg over 2 mL equals X over 0.5 mL = 25 mg.
D Incorrect: This would be in 1 mL.

Answer to Question 2

ANS: A

Feedback
A Correct: To convert 0.25 mg to mcg, multiply 0.25 mg by 1000 or move the decimal point to the right three places.
B Incorrect: The decimal point was moved three places to the left instead of three places to the right.
C Incorrect: The decimal point was moved only one place to the right.
D Incorrect: The decimal point was moved only two places to the right.



mcmcdaniel

  • Hero Member
  • *****
  • Posts: 550
Both answers were spot on, thank you once again



laurnthompson

  • Sr. Member
  • ****
  • Posts: 334

 

Did you know?

Fewer than 10% of babies are born on their exact due dates, 50% are born within 1 week of the due date, and 90% are born within 2 weeks of the date.

Did you know?

Tobacco depletes the body of vitamins A, C, and E, which can result in any of the following: dry hair, dry skin, dry eyes, poor growth, night blindness, abscesses, insomnia, fatigue, reproductive system problems, sinusitis, pneumonia, frequent respiratory problems, skin disorders, weight loss, rickets, osteomalacia, nervousness, muscle spasms, leg cramps, extremity numbness, bone malformations, decayed teeth, difficulty in walking, irritability, restlessness, profuse sweating, increased uric acid (gout), joint damage, damaged red blood cells, destruction of nerves, infertility, miscarriage, and many types of cancer.

Did you know?

Your skin wrinkles if you stay in the bathtub a long time because the outermost layer of skin (which consists of dead keratin) swells when it absorbs water. It is tightly attached to the skin below it, so it compensates for the increased area by wrinkling. This happens to the hands and feet because they have the thickest layer of dead keratin cells.

Did you know?

Symptoms of kidney problems include a loss of appetite, back pain (which may be sudden and intense), chills, abdominal pain, fluid retention, nausea, the urge to urinate, vomiting, and fever.

Did you know?

Drugs are in development that may cure asthma and hay fever once and for all. They target leukotrienes, which are known to cause tightening of the air passages in the lungs and increase mucus productions in nasal passages.

For a complete list of videos, visit our video library