A client with nasal congestion receives a prescription for phenylephrine 10 mg by mouth every 4 hours. Which client condition should the nurse report to the healthcare provider before administering the medication?

Choice A reason: Tetracycline HCl can cause photosensitivity, which increases the risk of sunburn and skin damage. The client should avoid direct sunlight and use sunscreen and protective clothing while taking the drug.

Choice B reason: Orange juice is acidic and can decrease the absorption of tetracycline HCl. The client should take the drug with water and avoid acidic foods and beverages.

Choice C reason: Serum drug levels are not routinely monitored for tetracycline HCl. The client should follow the prescribed dosage and duration of the therapy.

Choice D reason: Milk and antacids can interfere with the absorption of tetracycline HCl. The client should take the drug at least 1 hour before or 2 hours after meals and avoid dairy products and antacids.

Choice A reason: This is not the best assessment for the nurse to use to evaluate the client's therapeutic response to lactulose. Stool color and character may change as a result of lactulose administration, as it is a laxative that lowers the pH of the colon and promotes the excretion of ammonia. However, these changes are not indicative of the effectiveness of lactulose in reducing the ammonia levels in the blood, which is the main goal of the therapy.

Choice B reason: This is the best assessment for the nurse to use to evaluate the client's therapeutic response to lactulose. Serum electrolytes and ammonia are directly affected by lactulose administration, as it lowers the blood ammonia levels by converting it to ammonium and facilitating its elimination in the stool. The nurse should monitor the serum electrolytes and ammonia levels regularly to assess the efficacy and safety of lactulose therapy, as well as to adjust the dosage as needed.

Choice C reason: This is not the best assessment for the nurse to use to evaluate the client's therapeutic response to lactulose. Serum hepatic enzymes are markers of liver function and damage, and they may be elevated in clients with hepatic encephalopathy due to cirrhosis or other liver disorders. However, lactulose does not affect the hepatic enzymes directly, and it does not reverse the underlying liver disease. The nurse should monitor the serum hepatic enzymes to assess the progression and severity of the liver condition, but not to evaluate the response to lactulose.

Choice D reason: This is not the best assessment for the nurse to use to evaluate the client's therapeutic response to lactulose. Fingerstick glucose is a measure of blood glucose levels, and it may be altered in clients with hepatic encephalopathy due to impaired glucose metabolism by the liver. However, lactulose does not affect the blood glucose levels directly, and it does not improve the liver's ability to regulate glucose. The nurse should monitor the fingerstick glucose to assess the risk of hypoglycemia or hyperglycemia, but not to evaluate the response to lactulose.