RN Pharmacology BSN 315

Correct Answer: All of the above.

Detailed Explanation of the Correct Answer:

Morphine is a potent opioid analgesic that acts on the central nervous system (CNS) to provide pain relief, but it also has side effects like sedation and respiratory depression. Certain other medications and substances can increase the sedative effects of morphine due to their own CNS depressant properties or interactions.

Here is why each option contributes to increased sedation when combined with morphine:

ethanol (alcohol), is a strong CNS depressant. When combined with opioids like morphine, alcohol greatly increases sedation, and the combination can dangerously slow breathing, cause profound drowsiness, and increase the risk of coma or death.

diazepam, is a benzodiazepine that causes sedation, muscle relaxation, and anxiolysis. Combining diazepam with morphine amplifies CNS depression, greatly increasing the risk of severe sedation, respiratory depression, and death.

chlorpromazine, is an antipsychotic that has sedative properties. It can cause drowsiness and depress the CNS. When used with morphine, the sedative effects are enhanced, increasing the likelihood of extreme drowsiness, confusion, and respiratory issues.

clomipramine, is a tricyclic antidepressant (TCA). TCAs have sedating effects and can cause drowsiness. Combined with morphine, the overall sedative effect is increased, and there may also be additional risk of cardiac side effects and CNS depression.

Since all of these agents individually increase sedation and pose a danger when combined with morphine, the correct answer is E. All of the above.

Explanation of Why the Other Options Are Incorrect Individually:

While all options are technically correct in that each agent can increase sedation when combined with morphine, none of them are the only correct answer. The question is asking which would increase sedation, and since each one does, the only fully correct answer is E, meaning all of the above.

Summary:

The correct answer is All of the above because ethanol, diazepam, chlorpromazine, and clomipramine all have CNS depressant effects. When combined with morphine, they significantly increase sedation and the risk of serious, potentially life-threatening respiratory depression and coma. Therefore, extreme caution is necessary when morphine is used with any other sedative or depressant agent.

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: 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:"You can begin taking the Sinemet this evening, but do not take any more levodopa."

Explanation:

Levodopa/carbidopa (Sinemet) is often prescribed to treat Parkinson's disease. In this case, the client has been on regular levodopa therapy and is transitioning to sustained-release levodopa/carbidopa (Sinemet). The timing of the transition is important to ensure effective symptom control without causing excessive dosing. Since the client already took their regular levodopa at 0800, they can begin taking Sinemet in the evening for their next dose. It is important that the client does not take additional levodopa because the Sinemet contains both levodopa and carbidopa, and double dosing would lead to excessive levels of levodopa, increasing the risk of side effects.

Why Other Options Are Incorrect:

"Take the first dose of Sinemet today, as soon as your prescription is filled.": This is incorrect because it suggests that the client should take both levodopa and Sinemet on the same day, which could result in double dosing. The proper course is to start Sinemet in the evening after the morning dose of levodopa.

"Since you already took your levodopa, wait until tomorrow to take the Sinemet.": This is incorrect because it would delay the start of the new medication regimen unnecessarily. The Sinemet should be started that evening, and the levodopa dose from the morning is sufficient to last until then.

 "Take both drugs for the first week, then switch to taking only the Sinemet.": This is incorrect because there is no need to continue taking levodopa separately while starting the Sinemet. The transition from regular levodopa to Sinemet typically involves discontinuing the regular levodopa once the new combination medication is started

Summary:

The nurse should instruct the client to begin taking the Sinemet in the evening but not to take any more levodopa to avoid excessive dosing. This will help the client transition smoothly to the new medication regimen while preventing side effects from taking too much levodopa.

Correct Answer: Protamine sulfate

Explanation of the correct answer:

Protamine sulfate is the antidote for heparin overdose and is used to reverse the anticoagulant effects of heparin. When a client receiving IV heparin develops hemorrhaging, as described in this scenario, protamine sulfate is administered to neutralize heparin's effect and prevent further bleeding. Protamine works by binding to heparin, forming a stable complex that inactivates its anticoagulant properties.

Why the other options are incorrect:

Vitamin K1 (AquaMEPHYTON)

This is the antidote for warfarin (Coumadin) overdose, not heparin. Vitamin K reverses warfarin's effect by helping the liver produce clotting factors, but it has no effect on heparin.

Warfarin sodium (Coumadin)

Warfarin is another anticoagulant, not an antidote. Giving warfarin to a bleeding patient would worsen the hemorrhage, not stop it.

 Prothrombin

Prothrombin complex concentrates can help in severe bleeding related to warfarin or clotting factor deficiencies, but they are not the first-line reversal agent for heparin. Protamine sulfate remains the specific antidote.

Summary:

In the case of heparin-induced hemorrhage, the nurse should anticipate giving protamine sulfate to quickly reverse the effects of heparin and stop the bleeding. Other agents like vitamin K or prothrombin are used for different types of anticoagulant issues, but protamine sulfate is specific to heparin reversal.

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: Furosemide (Lasix)

Rationale:

Furosemide (Lasix) is a loop diuretic that promotes potassium excretion in the urine, leading to hypokalemia (low potassium levels). Loop diuretics work by inhibiting the Na-K-2Cl symporter in the loop of Henle, which increases sodium, chloride, and potassium excretion. This electrolyte imbalance can be dangerous in heart failure patients, as hypokalemia increases the risk of arrhythmias and can potentiate digoxin toxicity if the patient is also taking digoxin.

Why the Other Options Are Incorrect

Atenolol (Tenormin) 

Atenolol is a beta-blocker used for hypertension and heart failure. Beta-blockers do not cause potassium loss; in fact, some (like carvedilol) may increase potassium levels by reducing aldosterone secretion.

Hydralazine/Isosorbide Dinitrate (BiDil) 

This combination medication is used in heart failure, especially in Black patients. Hydralazine is a vasodilator, and isosorbide dinitrate is a nitrate that helps reduce preload. Neither medication directly affects potassium levels.

Digoxin (Lanoxin) 

Digoxin does not directly cause hypokalemia, but low potassium levels can increase digoxin toxicity. If the patient is hypokalemic, digoxin’s effects on the heart become stronger, increasing the risk of arrhythmias.

Summary

The correct answer is Furosemide (Lasix) because it is a loop diuretic that causes potassium loss, leading to hypokalemia. The other options are incorrect because beta-blockers (Atenolol), vasodilators (BiDil), and digoxin do not directly cause hypokalemia. However, hypokalemia increases digoxin toxicity risk, making potassium monitoring crucial in heart failure patients.

Correct Answer: Maintain a gastric pH of 3.5 or above.

Explanation:

Maalox is an antacid, which works by neutralizing stomach acid. Its primary purpose is to increase the gastric pH, typically maintaining it above 3.5. This helps reduce the symptoms of acid reflux and peptic ulcer disease by neutralizing excess acid in the stomach, providing relief from pain and irritation caused by the ulcers. Maintaining an appropriate gastric pH helps prevent further damage to the stomach lining and promotes healing of existing ulcers.

Why Other Options Are Incorrect:

 Decrease production of gastric secretions: Antacids like Maalox do not directly decrease the production of gastric secretions; rather, they neutralize the existing acid. Medications like H2 blockers (e.g., ranitidine) or proton pump inhibitors (PPIs, e.g., omeprazole) are typically used to decrease acid production in the stomach.

Produce an adherent barrier over the ulcer: This action is typically associated with sucralfate (Carafate), not antacids. Sucralfate works by forming a protective layer over the ulcer to help it heal, whereas Maalox neutralizes acid.

Decrease gastric motor activity: Antacids do not significantly affect gastric motility or motor activity. Prokinetic agents such as metoclopramide (Reglan) are used to enhance gastric motility in certain conditions like gastroparesis, but antacids focus on neutralizing acid.

Summary:

The purpose of Maalox (an antacid) in treating peptic ulcer disease is to maintain a gastric pH of 3.5 or above by neutralizing stomach acid. This helps relieve symptoms and promotes ulcer healing.

Correct Answer: Aspirin and non-steroidal anti-inflammatory drugs interact with ginkgo.

Explanation

Ginkgo biloba is an herbal supplement commonly used to enhance memory and improve circulation. However, one of its known effects is to increase the risk of bleeding because it has blood-thinning properties. Ginkgo biloba can interact with medications like aspirin and non-steroidal anti-inflammatory drugs (NSAIDs), both of which also have anticoagulant effects. When taken together, there is an increased risk of bleeding or bruising. This interaction is an important consideration for clients taking ginkgo biloba, especially if they are also using aspirin or NSAIDs for pain or inflammation. Therefore, the most important information to include in the teaching plan is about the potential interaction between ginkgo biloba and these medications.

Why the other options are wrong:

Anxiety and headaches increase with the use of ginkgo biloba:

While side effects of ginkgo biloba can include mild headaches or dizziness, anxiety is not commonly associated with the use of ginkgo biloba. This is not a major concern when compared to the risk of bleeding associated with its interaction with blood-thinning medications, which is why it is not the most important information to include in the teaching plan.

Nausea and diarrhea can occur when using this supplement:

Ginkgo biloba can cause mild gastrointestinal symptoms such as nausea or diarrhea in some people, but these side effects are generally rare and not severe. More critical to discuss are the interactions with blood-thinning medications, which pose a greater health risk, especially for someone with other health concerns, like multiple sclerosis. Therefore, nausea and diarrhea are not as significant in this context.

Ginkgo biloba use should be limited and not taken during pregnancy:

While it is generally advised that ginkgo biloba should be avoided during pregnancy, this specific concern might not be as immediately relevant to this client unless she is pregnant or planning to become pregnant. The interaction with aspirin or NSAIDs poses a more immediate and significant risk, making it more important to address first.

Summary:

The most important information for the nurse to include in the teaching plan is that aspirin and non-steroidal anti-inflammatory drugs (NSAIDs) interact with ginkgo biloba, increasing the risk of bleeding. This is crucial because many patients, particularly those with chronic conditions like multiple sclerosis, may be using these medications. While other side effects like nausea, diarrhea, or potential pregnancy risks should be addressed, the drug interaction with blood thinners is the highest priority.