A nurse is teaching a client who has a new prescription for nitroglycerin sublingual tablets for treating angina. Which of the following instructions should the nurse include in the teaching?

A) Monitor the client for seizure activity: While diazepam is an anticonvulsant medication and may be used to prevent or treat seizures, it is unlikely to cause seizure activity as an adverse reaction when administered for moderate sedation. However, if the client has a history of seizures or is at risk for seizures, monitoring for seizure activity is essential. In the context of moderate sedation, the primary concern is related to the sedative effects of diazepam rather than seizure activity.

B) Check the client's urinary output: Monitoring urinary out’ut is important for assessing renal function and fluid balance, but it is not directly related to assessing adverse reactions to diazepam. Adverse reactions to diazepam typically involve central nervous system depression, respiratory depression, or cardiovascular effects. Monitoring urinary output may be part of routine nursing care but is not specific to assessing adverse reactions to diazepam.

C) Monitor the client's oxygen saturation: This is the correct’action. Monitoring the client's oxygen saturation is essential for det’cting adverse reactions to diazepam, such as respiratory depression or hypoventilation. Diazepam can cause respiratory depression, especially when administered in higher doses or in combination with other sedative medications. Monitoring oxygen saturation allows the nurse to detect any signs of hypoxemia early and intervene promptly to ensure adequate oxygenation.

D) Auscultate the client's bowel sounds: While assessing bowel so’nds is important for evaluating gastrointestinal function, it is not directly related to assessing adverse reactions to diazepam. Adverse reactions to diazepam typically involve effects on the central nervous system and respiratory system rather than gastrointestinal function. Monitoring bowel sounds may be part of routine nursing assessment but is not specific to assessing adverse reactions to diazepam.

Lansoprazole: Lansoprazole is a proton pump inhibitor commonly used to reduce stomach acid production and treat conditions like gastroesophageal reflux disease (GERD) and ulcers. There are no significant contraindications or interactions between lansoprazole and nitroglycerin. Therefore, it is not contraindicated for use with nitroglycerin.

B) Diazepam: Diazepam is a benzodiazepine medication used to treat anxiety, muscle spasms, and certain seizure disorders. While caution may be necessary when using diazepam concurrently with nitroglycerin due to the potential for additive hypotensive effects, it is not typically contraindicated. However, close monitoring of blood pressure and signs of hypotension is prudent when these medications are used together.

C) Sildenafil: Sildenafil is a phosphodiesterase type 5 (PDE5) inhibitor used to treat erectile dysfunction and pulmonary arterial hypertension. Concomitant use of sildenafil with nitroglycerin is contraindicated due to the risk of profound hypotension, which can result in cardiovascular collapse. Both medications have vasodilatory effects, and their combination can lead to severe hypotension, syncope, and even myocardial infarction. Therefore, sildenafil is contraindicated for use with nitroglycerin.

D) Gemfibrozil: Gemfibrozil is a lipid-lowering medication used to reduce triglyceride levels in individuals with hypertriglyceridemia. There are no significant contraindications or interactions between gemfibrozil and nitroglycerin. Therefore, it is not contraindicated for use with nitroglycerin.