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

Author Question: A patient who has received an oral medication for treatment of hives says, How long will it be ... (Read 41 times)

cabate

  • Hero Member
  • *****
  • Posts: 537
A patient who has received an oral medication for treatment of hives says, How long will it be before my skin clears and quits itching? Which concepts should the nurse consider when formulating a response? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Standard Text: Select all that apply.
 
  1. The amount of time between administration and the drug taking effect is known as onset of action.
 
  2. Peak plasma levels rarely occur with oral medications.
 
  3. Duration of action is the amount of time a drug is effective.
 
  4. Peak plasma level is dependent on the drug's plasma half-life (t1/2).
 
  5. Drugs with short half-lives are ineffective in treating systemic illnesses.

Question 2

The nurse is reviewing the role of diffusion in the distribution of medications. Drugs that cannot be distributed by simple diffusion include those with which characteristics? Note: Credit will be given only if all correct choices and no incorrect choices are selected. Standard Text: Select all that apply.
 
  1. Large molecules
  2. Ionization
  3. Water-soluble agents
  4. Alcohol
  5. Urea



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

b614102004

  • Sr. Member
  • ****
  • Posts: 320
Answer to Question 1

1,3

Rationale 1: Onset of drug action represents the amount of time it takes to produce a therapeutic effect after drug administration.

Rationale 2: All medications have a peak plasma level.

Rationale 3: Duration of drug action is the amount of time a drug maintains its therapeutic effect.

Rationale 4: Peak plasma level and plasma half-life (t1/2) are related but not strictly dependent on one another.

Rationale 5: The effectiveness of a drug is not dependent on half-life as long as dosing frequency is correct.

Global Rationale: Onset of drug action represents the amount of time it takes to produce a therapeutic effect after drug administration. All medications have a peak plasma level. Duration of drug action is the amount of time a drug maintains its therapeutic effect. Peak plasma level and plasma half-life (t1/2) are related but not strictly dependent on one another. The effectiveness of a drug is not dependent on half-life as long as dosing frequency is correct.

Answer to Question 2

1,2,3
Rationale 1: Large molecules have difficulty crossing plasma membranes by simple diffusion.
Rationale 2: Ionized drugs have difficulty crossing plasma membranes by simple diffusion. These drugs may require carrier, or transport, proteins to cross membranes.
Rationale 3: Water-soluble agents have difficulty crossing plasma membranes by simple diffusion.
Rationale 4: Diffusion assumes that the chemical is able to freely cross the plasma membrane. Drugs may also enter through open channels in the plasma membrane; however, the molecule must be very small, such as alcohol.
Rationale 5: Diffusion assumes that the chemical is able to freely cross the plasma membrane. Drugs may also enter through open channels in the plasma membrane; however, the molecule must be very small, such as urea.
Global Rationale: Large molecules have difficulty crossing plasma membranes by simple diffusion. Ionized drugs have difficulty crossing plasma membranes by simple diffusion. These drugs may require carrier, or transport, proteins to cross membranes. Water-soluble agents have difficulty crossing plasma membranes by simple diffusion. Diffusion assumes that the chemical is able to freely cross the plasma membrane. Drugs may also enter through open channels in the plasma membrane; however, the molecule must be very small, such as alcohol or urea.





 

Did you know?

Parkinson's disease is both chronic and progressive. This means that it persists over a long period of time and that its symptoms grow worse over time.

Did you know?

Chronic necrotizing aspergillosis has a slowly progressive process that, unlike invasive aspergillosis, does not spread to other organ systems or the blood vessels. It most often affects middle-aged and elderly individuals, spreading to surrounding tissue in the lungs. The disease often does not respond to conventionally successful treatments, and requires individualized therapies in order to keep it from becoming life-threatening.

Did you know?

Your heart beats over 36 million times a year.

Did you know?

Acute bronchitis is an inflammation of the breathing tubes (bronchi), which causes increased mucus production and other changes. It is usually caused by bacteria or viruses, can be serious in people who have pulmonary or cardiac diseases, and can lead to pneumonia.

Did you know?

Amphetamine poisoning can cause intravascular coagulation, circulatory collapse, rhabdomyolysis, ischemic colitis, acute psychosis, hyperthermia, respiratory distress syndrome, and pericarditis.

For a complete list of videos, visit our video library