Q: Potassium depletion is LEAST likely to occur in a patient using

(a) :  ethacrynic acid (Edecrin)
(b) :  triamterene (Dyrenium)
(c) :  torsemide (Demadex)
(d) :  acetazolamide (Diamox)
(e) :  chlorthalidone (Hygroton)
Answer:  triamterene (Dyrenium)
Explanation:   Triamterene (Dyrenium) is one of three potassium-sparing diuretics currently on the market. The others include spironolactone (Aldactone) and amiloride (Midamor). These drugs are primarily used to enhance the action and counteract the potassium-depleting effect of thiazides and loop diuretics.

Q: Stavudine (Zerit) is an antiviral agent em- ployed in the treatment of

(a) :  HIV infection
(b) :  influenza A virus
(c) :  lupus erythematosus
(d) :  herpes zoster
(e) :  Mycobacterium avium complex
Answer:  HIV infection
Explanation:   Stavudine (Zerit) is an antiviral agent used in treating patients with HIV. Its use has been associated with the development of peripheral neuropathy.

Q: Carbon monoxide exerts its toxic effects pri-marilyby

(a) :  inhibiting the gag reflex
(b) :  decreasing the oxygen-carrying capacityof the blood
(c) :  reacting with amino acids in the body to form ammonia
(d) :   reacting with body enzymes to produce respiratory acidosis
(e) :  paralyzing the muscles of the di- aphragm
Answer:  decreasing the oxygen-carrying capacityof the blood
Explanation:   Carbon monoxide is a colorless and odorless product of the incomplete combustion of hydrocarbons. When it is inhaled and carried to the blood, it reacts with hemo- globin to form carboxyhemoglobin. This reaction dramatically reduces the oxygen carrying capacity of the blood and, unless corrected quickly, results in the death of the individual.

Q: Diflunisal (Dolobid) is most likely to be pre-scribed for the treatment of

(a) :  Wilson's disease
(b) :  rheumatoid arthritis
(c) :  cysteinuria
(d) :  psoriasis
(e) :  Hansen's disease
Answer:  rheumatoid arthritis
Explanation:   Diflunisal (Dolobid) is a salicylate that is employed in the treatment of mild to moderate pain, rheumatoid arthritis, and osteoarthritis.

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