This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: A vial of phenytoin sodium (Dilantin) contains 100 mg of drug in a total of 2 mL. How many ... (Read 34 times)

mcmcdaniel

  • Hero Member
  • *****
  • Posts: 550
on: Jul 24, 2018
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
Reply #1 on: Jul 24, 2018
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
Reply #2 on: Jul 24, 2018
Both answers were spot on, thank you once again


laurnthompson

  • Sr. Member
  • ****
  • Posts: 334
Reply #3 on: Jul 24, 2018
Great! Please up vote :D


« previous next »
 

Did you know?

There are more sensory neurons in the tongue than in any other part of the body.

Did you know?

Vampire bats have a natural anticoagulant in their saliva that permits continuous bleeding after they painlessly open a wound with their incisors. This capillary blood does not cause any significant blood loss to their victims.

Did you know?

Nearly all drugs pass into human breast milk. How often a drug is taken influences the amount of drug that will pass into the milk. Medications taken 30 to 60 minutes before breastfeeding are likely to be at peak blood levels when the baby is nursing.

Did you know?

GI conditions that will keep you out of the U.S. armed services include ulcers, varices, fistulas, esophagitis, gastritis, congenital abnormalities, inflammatory bowel disease, enteritis, colitis, proctitis, duodenal diverticula, malabsorption syndromes, hepatitis, cirrhosis, cysts, abscesses, pancreatitis, polyps, certain hemorrhoids, splenomegaly, hernias, recent abdominal surgery, GI bypass or stomach stapling, and artificial GI openings.

Did you know?

Limit intake of red meat and dairy products made with whole milk. Choose skim milk, low-fat or fat-free dairy products. Limit fried food. Use healthy oils when cooking.

sodium sodium
Drug Forms and Routes of Administration Drug Forms and Routes of Administration
Some mechanisms of agonistic and antagonistic drug effects. Some mechanisms of agonistic and antagonistic drug effects.
Agricultural Land as a Fraction of Total Wealth in the United Kingdom Agricultural Land as a Fraction of Total Wealth in the United Kingdom
Drug Label for Doxazosin Mesylate Drug Label for Doxazosin Mesylate
A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ... A wave whose wavelength is 0.500 m is traveling down a 500-m long wire whose total mass is 25 ...
Video: Green alga life cycle Animation

For a complete list of videos, visit our video library