RN Pharmacology BSN 315

Correct Answer: determine the frequency and consistency of bowel movements.

Explanation

This is correct because before giving a laxative, it is essential to assess the client’s bowel pattern, specifically the frequency, consistency, and characteristics of recent bowel movements. This assessment helps the nurse determine:

If the client is actually constipated or in need of a laxative.

The effectiveness of previous bowel management strategies.

Whether the client may be at risk for diarrhea, fecal impaction, or overuse of laxatives.

The most appropriate type of laxative if needed.

Giving a laxative without knowing the client’s bowel history and current status can be harmful. For example, if the client already has diarrhea, administering a laxative could worsen the condition, leading to dehydration and electrolyte imbalance.

 Why the Other Options Are Incorrect:

Observe the skin integrity of the client's rectal and sacral areas.

This is an important assessment in bedfast clients to prevent pressure ulcers and monitor for skin breakdown, especially if there is incontinence. However, this does not directly impact the decision to administer a laxative, making it a secondary priority in this context.

 Assess the client's strength in moving and turning in the bed.

This is relevant to prevent immobility complications and assist with positioning during bowel movements or hygiene care, but it is not the most critical assessment before giving a laxative.

 Evaluate the client's ability to recognize the urge to defecate.

This is useful when planning toileting schedules, particularly with neurogenic bowel issues, but it does not determine if the client needs a laxative at that moment.

Summary:

Before administering a laxative to a bedfast client, the most important assessment is to check the frequency and consistency of bowel movements to ensure the medication is appropriate and safe to give. Skin integrity, strength, and awareness of defecation urges are all valuable assessments but are secondary to the fundamental question of whether the client is constipated or has another bowel elimination issue. 

Correct Answer: When signs of severe hypoglycemia occur.

Explanation

Glucagon is a hormone used to treat severe hypoglycemia (low blood sugar), particularly in patients with diabetes who are unable to eat or drink enough to raise their blood sugar levels. It is typically administered when a person has symptoms of severe hypoglycemia, such as confusion, inability to wake up, or loss of consciousness. The glucagon injection works by stimulating the liver to release stored glucose into the bloodstream, rapidly raising blood sugar to a safer level. Severe hypoglycemia is a medical emergency, and glucagon is used in situations where the person is unable to take glucose orally.

Why the other options are wrong:

Before meals to prevent hyperglycemia:

Glucagon is not used to prevent hyperglycemia (high blood sugar). It is a treatment for hypoglycemia, and it works by raising blood sugar levels, not lowering them. The prevention of hyperglycemia is typically managed with insulin and dietary adjustments, not glucagon.

At the onset of signs of diabetic ketoacidosis:

Diabetic ketoacidosis (DKA) is a serious complication of diabetes, but it is caused by hyperglycemia, not hypoglycemia. Glucagon is not used for DKA; instead, treatment for DKA involves insulin to lower blood sugar and fluids to correct dehydration and electrolyte imbalances. Glucagon would not be used in this case.

When unable to eat during sick days:

If a person with diabetes is sick and unable to eat, they may be at risk for hypoglycemia or hyperglycemia, depending on other factors. Glucagon is only administered for severe hypoglycemia, not as a routine measure when someone is unable to eat. The focus during sick days is typically on adjusting insulin doses and monitoring blood sugar levels.

Summary:

Glucagon should be administered when signs of severe hypoglycemia occur. It is not used to manage hyperglycemia, diabetic ketoacidosis, or situations where a person is simply unable to eat. It is a life-saving intervention for severe low blood sugar and should be used in those emergency situations.

Correct Answer: Monitor blood pressure.

Explanation 

Tamsulosin is a medication classified as an alpha-adrenergic blocker, commonly prescribed to treat benign prostatic hyperplasia (BPH). It works by relaxing the smooth muscles in the prostate and bladder neck, improving urine flow in men with BPH. However, because alpha-blockers also affect blood vessels, one of the most important adverse effects of tamsulosin is orthostatic hypotension (a significant drop in blood pressure when standing up), which can lead to dizziness, lightheadedness, and fainting.

Therefore, monitoring blood pressure, particularly for signs of orthostatic changes, is essential to detect this side effect early and prevent falls or injury.

Explanation of why the other options are incorrect:

 Assess urine output:

While improving urine flow is the desired effect of tamsulosin, monitoring urine output helps evaluate the medication's effectiveness, not its adverse effects. Tamsulosin improves urination, so unless there is a complete lack of improvement, urine output is less critical for detecting harmful side effects.

Obtain daily weights:

Daily weights are typically monitored in conditions involving fluid balance like heart failure or kidney disease. Tamsulosin does not cause fluid retention or weight changes, so this is not relevant for monitoring adverse reactions to this medication.

Perform a bladder scan:

A bladder scan measures post-void residual urine and is helpful for diagnosing urinary retention, which is a symptom of BPH itself. However, once tamsulosin is started, the expectation is that retention improves. A bladder scan would evaluate effectiveness of therapy, but it is not useful for identifying adverse effects like hypotension.

Summary:

The correct answer is monitor blood pressure because tamsulosin can cause orthostatic hypotension, a potentially dangerous side effect. The other options focus on evaluating the effectiveness of treatment (such as urine output or bladder scans) or unrelated concerns (like daily weights), making them incorrect choices for monitoring adverse reactions to tamsulosin.

Correct Answer: Renal failure

Antacids that contain magnesium and calcium should be used with caution in patients with renal failure because the kidneys play a crucial role in excreting excess magnesium and calcium. In renal failure, the kidneys cannot properly clear these minerals, leading to hypermagnesemia or hypercalcemia, which can cause serious complications such as cardiac arrhythmias, muscle weakness, and neurological impairments. Magnesium-containing antacids, in particular, can cause central nervous system depression and worsen renal function.

Why the Other Options Are Incorrect

Hypertension 

Magnesium- and calcium-containing antacids do not significantly impact blood pressure. However, sodium-containing antacids (such as sodium bicarbonate) should be used cautiously in hypertensive patients because they can cause fluid retention and raise blood pressure. Magnesium and calcium antacids do not pose the same risk.

Heart failure 

Antacids with high sodium content can contribute to fluid retention and worsening heart failure, but magnesium and calcium-based antacids do not have the same effect. However, caution is needed if a patient with heart failure also has renal impairment, as this can lead to electrolyte imbalances.

Peptic ulcer disease

Antacids are commonly used to manage peptic ulcer disease (PUD) by neutralizing stomach acid and relieving symptoms. While they do not treat the underlying cause of PUD, they provide symptomatic relief. Therefore, these antacids are not contraindicated in peptic ulcer disease.

Summary

The correct answer is Renal failure because patients with impaired kidney function cannot properly excrete excess magnesium and calcium, increasing the risk of toxicity. The other options are incorrect because these antacids do not directly worsen hypertension, they do not significantly impact heart failure unless renal function is also compromised, and they are actually used to relieve symptoms of peptic ulcer disease.

Correct Answer: Ondansetron (Zofran)

Ondansetron (Zofran) is a 5-HT3 receptor antagonist that is highly effective in preventing and treating nausea and vomiting caused by chemotherapy (CINV). It works by blocking serotonin receptors in the chemoreceptor trigger zone (CTZ) of the brain, which is responsible for inducing vomiting in response to chemotherapy. Ondansetron is a first-line antiemetic for cancer patients receiving highly emetogenic chemotherapy regimens.

Why the Other Options Are Incorrect

Cimetidine 

Cimetidine is an H2-receptor antagonist used to reduce stomach acid production in conditions like GERD and peptic ulcers. It has no antiemetic properties and is not effective for chemotherapy-induced nausea and vomiting (CINV).

Chlorpromazine (Thorazine) 

Chlorpromazine is a phenothiazine antipsychotic that has some antiemetic effects, but it is not the preferred treatment for chemotherapy-induced nausea. It is more commonly used for nausea related to motion sickness or vertigo rather than CINV. Additionally, it has a higher risk of sedation and extrapyramidal side effects (EPS).

 Scopolamine (Scopace) 

Scopolamine is an anticholinergic medication that is primarily used to prevent motion sickness and postoperative nausea. However, it is not effective for chemotherapy-induced nausea and vomiting and is not commonly used in oncology settings.

Summary

The correct answer is Ondansetron (Zofran) because it is a serotonin (5-HT3) receptor antagonist that effectively treats chemotherapy-induced nausea and vomiting (CINV). The other options are incorrect because cimetidine is for acid reflux, chlorpromazine is more for motion sickness with high sedation risk, and scopolamine is mainly for motion sickness, not chemotherapy-related nausea.

Correct Answer: The rate and depth of the client's respirations.

Explanation:

Before initiating a patient-controlled analgesia (PCA) pump for morphine administration, the most critical assessment is the rate and depth of the client's respirations. This is because morphine, as an opioid, can cause respiratory depression, a potentially life-threatening side effect. Since the client is receiving a basal rate and can self-administer additional doses via the PCA pump, it is essential to ensure that the client’s respiratory status is stable before starting the PCA. Opioid-induced respiratory depression is the most serious adverse effect, and careful monitoring is required to prevent complications like hypoventilation or respiratory arrest.

Why the Other Options Are Incorrect:

The expiration date on the morphine syringe in the pump: While it is important to ensure that medications are not expired, the client's respiratory status is of greater concern when administering morphine, as it poses an immediate risk to their safety.

The type of anesthesia used during the surgical procedure: Although it is useful to know the type of anesthesia used, it is not the most critical assessment before initiating the PCA pump. The primary concern is the client’s ability to breathe adequately, as opioids can interact with anesthesia to further depress respiration.

 The client's subjective and objective signs of pain: While assessing pain is essential to determine if the PCA pump should be initiated, it is secondary to ensuring that the client can safely tolerate opioid therapy without risk of respiratory depression. Pain can be addressed once the respiratory status is stable.

Summary:

The most important assessment before initiating a PCA pump for morphine administration is evaluating the rate and depth of the client's respirations. Opioids like morphine can cause respiratory depression, so ensuring the client’s ability to breathe adequately is the top priority.

Correct Answer: "My mouth feels sore."

Explanation 

 "My mouth feels sore."

A sore mouth is a classic symptom of oral thrush, which is a fungal superinfection often caused by Candida albicans. Superinfections occur when normal flora are disrupted by broad-spectrum anti-infective (antibiotic) therapy, allowing overgrowth of resistant organisms like fungi or other bacteria. Common superinfections include:

Oral thrush (white patches, sore mouth)

Vaginal yeast infections

C. difficile colitis

A sore mouth or discomfort, particularly if accompanied by white patches on the tongue or inside the cheeks, is a hallmark sign of oral candidiasis, a superinfection that frequently occurs during or after antibiotic treatment.

Why the Other Options Are Incorrect:

 "I have a headache."

Headaches can happen for many reasons, but they are nonspecific and not directly indicative of a superinfection. They are also not a common or defining symptom of superinfections.

"My ears feel plugged up."

Plugged ears may relate to ear congestion, fluid buildup, or sinus issues but are not associated with superinfections caused by antibiotic use.

"I feel constipated."

Constipation is not a typical sign of a superinfection. More often, antibiotics can cause diarrhea (and in some cases severe diarrhea from C. difficile), not constipation.

Summary:

Superinfections occur when antibiotic therapy disrupts the normal balance of microorganisms, allowing overgrowth of other pathogens, particularly fungi like Candida. Sore mouth complaints raise concern for oral thrush, making "My mouth feels sore" the most appropriate answer. 

Correct Answer: Decrease in level of chest pain.

Explanation

 Decrease in level of chest pain

Sublingual nitroglycerin is primarily prescribed to treat angina pectoris (chest pain) caused by myocardial ischemia due to reduced blood flow to the heart muscle. Nitroglycerin works by vasodilation of the coronary arteries, which improves oxygen delivery to the heart and reduces the workload of the heart by decreasing preload and afterload. The most accurate indicator that nitroglycerin has been effective is a reduction or complete relief of chest pain after administration, typically within 1 to 5 minutes

Why the Other Options Are Incorrect:

Clear bilateral breath sounds

Clear lung sounds are important for respiratory assessment but are not related to the effectiveness of nitroglycerin. Nitroglycerin targets cardiac ischemia, not pulmonary issues such as fluid overload or lung congestion.

Increase in blood pressure

Nitroglycerin causes vasodilation, which typically leads to a decrease in blood pressure, not an increase. Monitoring blood pressure is important to ensure it does not drop too low after administration, but a rise in blood pressure would not reflect the drug’s therapeutic effect.

Increase in urinary output

Increased urine output might be seen with diuretic therapy or improved cardiac output in heart failure treatment, but it is not an expected or direct indicator of nitroglycerin effectiveness.

Summary:

Nitroglycerin's primary goal is to relieve chest pain associated with angina by improving blood flow to the heart. The best indicator that the medication has worked is a decrease in the client's chest pain, making Decrease in level of chest pain the correct answer.

Correct Answer: Hypertension.

Explanation

Phenylephrine is a decongestant commonly used to relieve nasal congestion. It works as a sympathomimetic drug, meaning it stimulates alpha-adrenergic receptors, causing vasoconstriction of blood vessels. This vasoconstriction reduces swelling in the nasal passages to relieve congestion. However, because phenylephrine causes widespread vasoconstriction, it can also raise blood pressure and worsen existing hypertension. This is especially dangerous for people with a history of high blood pressure because it increases the risk of serious cardiovascular events such as stroke, heart attack, and hypertensive crisis. For this reason, the nurse should report a history of hypertension to the healthcare provider before giving phenylephrine, as it may not be safe and an alternative medication might be needed

Why the other options are incorrect:

Bronchitis:

Bronchitis involves inflammation of the bronchial tubes, typically caused by infection or irritation. While congestion is common with bronchitis, bronchitis does not specifically increase the risk of complications from phenylephrine. Phenylephrine might even help relieve nasal symptoms, so this is not a reason to hold the medication.

 Diarrhea:

Diarrhea is unrelated to the mechanism of phenylephrine. While dehydration from severe diarrhea may affect general health, diarrhea does not directly interact with phenylephrine or increase its risks, so this is not a reason to report before administration.

Edema:

Edema (fluid retention) may be related to heart, kidney, or liver conditions, but phenylephrine does not directly worsen or cause edema. While edema could be part of an overall cardiovascular picture, hypertension is the more specific and critical contraindication related to phenylephrine use. Edema alone does not automatically require holding this medication without other risk factors.

Summary:

The correct answer is hypertension because phenylephrine increases blood pressure through vasoconstriction, making it dangerous for clients with high blood pressure. The other conditions (bronchitis, diarrhea, and edema) do not directly increase the risk of serious adverse effects from phenylephrine, making them incorrect in this context. The nurse must prioritize patient safety by reporting hypertension before administering phenylephrine.