A patient will be discharged from the hospital with a prescription for TMP/SMZ (Bactrim). When providing teaching for this patient, the nurse will tell the patient that it will be important to:
a. drink 8 to 10 glasses of water each day.
b. eat foods that are high in potassium.
c. take the medication with food.
d. take folic acid supplements.
ANS: A
TMP/SMZ can injure the kidneys, because it causes deposition of sulfonamide crystals in the kidneys. Patients should be advised to drink 8 to 10 glasses of water a day to maintain a urine flow of 1200 mL in adults. Trimethoprim can cause hyperkalemia, so consuming extra potassium is unnecessary. The medication should be taken on an empty stomach. It is not necessary to consume extra folic acid, because mammalian cells use dietary folate and do not have to synthesize it; it is the process of folic acid synthesis that is altered by sulfonamides.
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