471. The drug which gives orange colour to the urine is______________?

A. Rifampicin
B. Ethambutol
D. Streptomycin

472. Which on of the following is penicillinase resistant penicillin_______________?

A. Amoxycillin
B. Cloxacillin
C. Ampicillin
D. Penicillin G

473. Desfuroxamide is a drug used for____________?

A. Kala azar
B. Pernicious anaemia
C. Pain control
D. Thalassemia

474. A patient has seasonal allergic rhinitis and is on terfenadine, He develps cardiac arrhythmias after a course of antibiotics. Which of the following antibiotic could have been given_____________?

A. Ampicillin
B. Tetracyclin
C. Erythromycin
D. Co-trimoxazole

475. Antifungal drug not used in the treatment of imtestinal candidiasis______________?

A. Amphotericin
B. Nystatin
C. Ketoconazole
D. Clotrimazole

476. The drug of choice for treatment of tyhoid is____________?

A. Tetracycline
B. Metronidazole
C. Ciprofloxacin
D. Cefotaxim

477. The bacterial resistance to tetracycline is due to___________?

A. Alteration of drug binding sites
B. Alteration of dehydrofolate reductase
C. Inactivation of drug by enzymes
D. Decreased uptake of drug by bacteria

478. Mechanism of action of quinolones is______________?

A. Inhibits DNA gyrase
B. Inhibits Bacterial protein synthesis
C. Inhibits bacterial cell wall synthesis
D. Inhibits intake of folic acid

479. Tetracycline is contraindicated in_____________?

A. Children
B. Pregnancy
C. Renal failure
D. All of the above

480. The antibiotic of choice in patients sensitive to penicillin is___________?

A. Erythromycin
B. Streptomycin
C. Tetracycline
D. Chloramphenicol