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HESI LPN · HESI LPN Pharmacology · HESI Drugs for immune system

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Showing all 5 practice questions with expert explanatory rationales.

Question 1 of 5

The drug of choice for scarlet fever is

A. Tetracycline

B. Sulfonamides

C. Penicillin

D. Chloromycetin

Expert Explanatory Rationale

Correct Answer: Penicillin

Question 2 of 5

Streptomycin is more active at

A. pH 5.5 than pH 8.5 of urine

B. pH 8.5 than pH 5.5 of urine

C. Equally active at all pH of urine

D. All of the above

Expert Explanatory Rationale

Correct Answer: pH 8.5 than pH 5.5 of urine

Question 3 of 5

Bleomycin is used in most effective drug combination regimen for the chemotherapy of testicular carcinoma. Which one of the following statements about the drug is accurate?

A. Acts mainly in the M phase of the cell cycle

B. Derived from the bark of yew trees

C. Myelosuppression is dose-limiting

D. Pulmonary infiltrates and fibrosis may occur

Expert Explanatory Rationale

Correct Answer: Pulmonary infiltrates and fibrosis may occur

Question 4 of 5

The most important reason for highly restricted use of penicillin G injections in present-day therapeutics is its

A. Narrow spectrum of activity

B. Potential to cause hypersensitivity reaction

C. Short duration of action

D. Neurotoxicity

Expert Explanatory Rationale

Correct Answer: Potential to cause hypersensitivity reaction

Question 5 of 5

Cephalosporins

A. Are more vulnerable to beta-lactamase enzyme

B. Are less vulnerable to beta-lactamase enzyme

C. Do not possess beta lactam ring

D. Have multiple beta lactam rings

Expert Explanatory Rationale

Correct Answer: Are less vulnerable to beta-lactamase enzyme

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