Question 77

Phenazopyridine may cause urine discoloration.

Phenazopyridine is known to cause a change in urine color, often resulting in a bright orange or red hue due to its dye properties. This medication is specifically used to relieve urinary tract discomfort, and its effect on urine coloration is a well-documented side effect.

A) Desloratadine

Desloratadine is an antihistamine used to treat allergies and does not typically affect urine color. Its pharmacological action does not involve any dyes or compounds that would alter the appearance of urine.

B) Hydrochlorothiazide

Hydrochlorothiazide is a diuretic that helps to eliminate excess fluid from the body but does not cause urine discoloration. While it can influence urine volume and concentration, it does not impart any specific color change.

C) Phenazopyridine

Phenazopyridine is an analgesic specifically used for relieving urinary tract pain, and it can indeed cause urine to turn bright orange or red. This effect is due to the compound's inherent dye properties, making it a well-known medication associated with urine discoloration.

D) Amoxicillin

Amoxicillin is an antibiotic that does not typically cause urine discoloration. While some antibiotics can lead to changes in urine appearance due to other factors, amoxicillin is not known for causing any significant coloration changes.

Conclusion

Phenazopyridine is the only medication listed that is known to cause a distinct change in urine color, specifically resulting in bright orange or red urine. The other options, while effective for their respective uses, do not share this side effect, making Phenazopyridine the definitive answer to the question regarding urine discoloration.