Question 75

Rifampin turns urine orange-red.

Rifampin is known to cause a distinct change in urine color, resulting in an orange-red hue due to its chemical properties. This side effect is commonly recognized in patients prescribed this medication.

A) Rifampin

Rifampin is an antibiotic that is well-documented for causing orange-red discoloration of urine. This is attributed to the drug's ability to stain bodily fluids, which is a characteristic effect of this medication and is important for patients to be aware of when undergoing treatment.

B) Ampicillin

Ampicillin does not typically cause any significant change in urine color. While it is an effective antibiotic used to treat various infections, it does not have the same staining effects as Rifampin, making this option incorrect regarding the specific question asked.

C) Ciprofloxacin

Ciprofloxacin, a fluoroquinolone antibiotic, does not result in orange-red urine. Although it is used to treat bacterial infections, it does not share the side effect of discoloration in urine that is associated with Rifampin, thus ruling it out as a correct answer.

D) Erythromycin

Erythromycin, an antibiotic effective against a variety of infections, also does not cause orange-red urine. This medication is known for its side effects, but discoloration of urine is not one of them, making it an incorrect choice in this context.

Conclusion

Rifampin is definitively the correct answer as it is specifically known to cause orange-red urine, a side effect that is important for patients to recognize. The other options—Ampicillin, Ciprofloxacin, and Erythromycin—do not exhibit this particular characteristic, confirming that Rifampin is the only correct choice based on the question regarding urine discoloration.