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 39 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?

Asthma attacks and symptoms usually get started by specific triggers (such as viruses, allergies, gases, and air particles). You should talk to your doctor about these triggers and find ways to avoid or get rid of them.

Did you know?

Disorders that may affect pharmacodynamics include genetic mutations, malnutrition, thyrotoxicosis, myasthenia gravis, Parkinson's disease, and certain forms of insulin-resistant diabetes mellitus.

Did you know?

Long-term mental and physical effects from substance abuse include: paranoia, psychosis, immune deficiencies, and organ damage.

Did you know?

Anesthesia awareness is a potentially disturbing adverse effect wherein patients who have been paralyzed with muscle relaxants may awaken. They may be aware of their surroundings but unable to communicate or move. Neurologic monitoring equipment that helps to more closely check the patient's anesthesia stages is now available to avoid the occurrence of anesthesia awareness.

Did you know?

Aspirin is the most widely used drug in the world. It has even been recognized as such by the Guinness Book of World Records.

For a complete list of videos, visit our video library