A nurse assisting a nursing student with medications asks the ...

[ts19998]

A nurse assisting a nursing student with medications asks the student to describe how penicillins (PCNs) work to treat bacterial infections. The student is correct in responding that penicillins:
 
  a. disinhibit transpeptidases.
  b. disrupt bacterial cell wall synthesis.
  c. inhibit autolysins.
  d. inhibit host cell wall function.

Question 2

A 68-year-old male patient receives a prescription for 25-mg tablets of sildenafil Viagra for erectile dysfunction. When he asks the nurse how to take the medication, the nurse will tell him to:
 
  a. begin taking one tablet twice daily, 12 hours apart.
  b. start with one tablet about 1 hour before anticipated sexual activity.
  c. take 25 to 100 mg per dose 30 minutes to 4 hours before sexual activity.
  d. take two tablets 1 hour before sexual ac-tivity with a high-fat meal.

[Anonymous]

Answer to Question 1

B
PCNs weaken the cell wall, causing bacteria to take up excessive amounts of water and subse-quently rupture. PCNs inhibit transpeptidases and disinhibit autolysins. PCNs do not affect the cell walls of the host.

Answer to Question 2

B
Patients older than 65 years should start with a low dose of 25 mg and may take the drug 1 hour before anticipated sexual activity. Sildenafil is taken when needed and not on a routine basis. Dosing at 25 to 100 mg per dose 30 minutes to 4 hours before sexual activity is the standard recommendation for men younger than 65 years. Two tablets is a high dose; consumption of a high-fat meal would interfere with absorption of sildenafil.

[ts19998]

Thanks

[Anonymous]

Welcome