Pharmacology Chapters 1 and 2

Abnormalities in metabolism may occur in patients with cirrhosis or hepatitis. Cirrhosis is a condition in which the liver is scarred and cannot function properly, while hepatitis is inflammation of the liver. The liver plays a crucial role in drug metabolism, where drugs are broken down into metabolites that can be eliminated from the body. In patients with liver disease, the liver's ability to metabolize drugs may be impaired, leading to an accumulation of drugs in the body or altered drug effects. Therefore, abnormalities in metabolism are likely to occur in patients with cirrhosis or hepatitis.

The elderly woman's experience of feeling restless all night and not being able to sleep after taking the prescription medicine suggests that she is experiencing an idiosyncratic reaction. An idiosyncratic reaction is a rare and unpredictable response to a medication that is not related to the drug's known pharmacological effects. In this case, the medicine intended to help her sleep had the opposite effect, causing restlessness and insomnia. This type of reaction is not common and can vary from person to person.

When transcribing orders and considering when to correctly administer a medication, the most important factor to assess is the patient's identification. This is crucial to ensure that the medication is given to the correct patient, preventing any potential harm or errors. The patient's gender, last meal, and weight may be important factors to consider for other aspects of care, but they are not directly relevant to the administration of medication.

The correct answer is "I will apply the patch to an area of the skin with no hair." This statement indicates that the client understands the proper technique for applying a transdermal medication. Applying the patch to an area of the skin with no hair ensures better adhesion and absorption of the medication.

The nurse should have a blood specimen obtained immediately prior to the next dose of medication. This is because the provider has prescribed to verify the trough level of the client's medication. The trough level refers to the lowest concentration of the medication in the client's bloodstream, which is typically measured just before the next dose is administered. By obtaining a blood specimen at this time, the nurse can accurately assess the trough level and ensure that the medication is within the therapeutic range.

Most drugs are considered to be effectively removed from the body after approximately five half-lives. This is because after each half-life, the concentration of the drug in the body decreases by half. By the time five half-lives have passed, the drug concentration is reduced to a negligible amount, making it effectively eliminated from the body.

During the planning phase of the nursing process, the nurse prioritizes the nursing diagnosis. This is because during this phase, the nurse identifies the client's problems, sets goals and develops a plan of care. Prioritizing the nursing diagnosis helps the nurse determine which problems are most urgent and need immediate attention. By prioritizing, the nurse ensures that the client's needs are addressed in a systematic and effective manner, improving the overall quality of care provided.

The question asks for examples of enteral dosage routes, which are routes of administration where the medication is absorbed through the gastrointestinal tract. Sublingual and buccal routes involve placing the medication under the tongue and against the cheek, respectively, allowing for absorption through the mucous membranes in the mouth. Time released tablets are also an example of an enteral dosage route, as they are designed to release the medication slowly over an extended period of time in the gastrointestinal tract.

Pharmacokinetics is the study of how drugs are distributed within the body, including the rates at which they move between different compartments. This involves understanding how drugs are absorbed, distributed, metabolized, and eliminated by the body. By studying the distribution rates among various body compartments, pharmacokinetics helps to determine how drugs are distributed throughout the body and how they are affected by factors such as blood flow, tissue binding, and drug interactions.

The correct answer indicates understanding of the discussion because it acknowledges the importance of having another nurse listen to the phone call when accepting a telephone prescription. This is crucial for ensuring accuracy and preventing any potential errors or miscommunication.

Dosages greater than 1 should be rounded to the nearest tenth. This means that if the dosage is between two whole numbers, it should be rounded to the closest tenth. For example, if the dosage is 1.45, it should be rounded to 1.5. This ensures that the dosage is a more precise measurement and avoids any potential errors or inaccuracies in the dosage calculation.

IV medications should never infuse through tubing that is infusing blood products, blood, or parenteral nutritional solutions because it can lead to contamination or incompatibility. Medications and blood products have different components that can interact and cause adverse reactions or affect the effectiveness of the medication. Similarly, parenteral nutritional solutions have specific compositions that can be altered or compromised by the introduction of medications. Therefore, it is crucial to use separate tubing for infusing IV medications to ensure patient safety and maintain the integrity of the medications and other infusions.

Changing positions slowly when moving from sitting to standing is an appropriate statement by the nurse for a client who has a new prescription for an antihypertensive medication. Antihypertensive medications can cause orthostatic hypotension, which is a sudden drop in blood pressure when changing positions. By advising the client to change positions slowly, the nurse is helping to prevent dizziness, lightheadedness, and potential falls that can occur due to a sudden drop in blood pressure.

Excessive drug dosages, poor circulation, impaired metabolism, or inadequate excretion can lead to a cumulative effect of a drug. This means that the drug will build up in the body over time, causing a stronger or more prolonged effect than intended. This can be dangerous as it increases the risk of toxicity and adverse reactions. The nurse needs to be aware of these factors and monitor patients closely to prevent or detect a cumulative effect.

The correct answer is "Route." In order to give medication safely, it is important to know the specific route of administration. The order only states the medication and the dosage, but it does not provide information on how the medication should be given (e.g. orally, intravenously, intramuscularly). Without knowing the route, it would not be possible to administer the medication correctly and safely.

The correct answer suggests that the outcome of patient teaching activities will result in the patient and their daughter being able to correctly state the proper way to take the drug. This implies that the patient has been educated on the correct dosage, administration, and any specific instructions or precautions associated with taking digitalis therapy. It also indicates that the patient's daughter has been included in the teaching process, which can help ensure proper adherence to the medication regimen.

The nurse chose the intravenous route instead of the intramuscular route for giving medications to a patient in heart failure because the factor that most influences the decision about which route to use is the patient's diminished circulation. In heart failure, the heart is unable to pump blood effectively, resulting in reduced blood flow to various organs and tissues. By choosing the intravenous route, the medication can be directly delivered into the bloodstream, bypassing the need for absorption through the muscles, which may be compromised in a patient with diminished circulation.

If a prescriber gives a verbal order, it is important for the order to be signed by the prescriber within 24 hours. This ensures that the order is properly documented and authorized. Signing the order within this timeframe also helps to maintain accurate and up-to-date patient records, as well as ensuring accountability and traceability in the prescribing process. Failing to sign the order within the specified time may result in delays or errors in patient care, and may also be a violation of legal and regulatory requirements.

The nurse should plan to distend the vein by using a blood pressure cuff. This is done to make the veins more visible and easier to access for inserting the IV catheter. By inflating the blood pressure cuff above the client's systolic pressure, the veins will become engorged with blood, making them easier to see and palpate. This technique helps to ensure a successful and accurate insertion of the IV catheter.

Massaging the site after injection can increase the absorption of a medication administered intramuscularly. Massaging helps to disperse the medication and increase blood flow to the area, which can enhance absorption. This technique is commonly used to promote absorption and prevent the formation of medication pockets or nodules at the injection site.

Avoiding reinsertion of the needle into an IV catheter will minimize the risk of catheter embolism. When the needle is reinserted into the catheter, it can cause damage to the catheter, leading to the potential dislodgement of small fragments. These fragments can then travel into the bloodstream and cause an embolism. By avoiding reinsertion, the nurse can reduce the risk of this complication. Performing hand hygiene, rotating IV sites, and minimizing tourniquet time are important practices for IV therapy management but do not directly address the risk of catheter embolism.

To administer D5W 200 mL IV over 5 hours, the nurse needs to calculate the rate at which the IV pump should deliver the solution. By dividing the total volume (200 mL) by the total time (5 hours), we get 40 mL/hr. Therefore, the IV pump should be set to deliver 40 mL/hr to infuse the solution over the desired time period.

Pharmacodynamics is the study of the physiochemical properties of drugs and how they influence the body. It focuses on understanding how drugs interact with the body's receptors and enzymes to produce therapeutic effects. This field of study helps in determining the dosage, effectiveness, and safety of drugs, as well as understanding the mechanisms of drug action and potential side effects.

The nurse should clarify the time part of the prescription with the provider. The prescription states that the medication is to be taken "PRN" (as needed) for nausea and vomiting. However, it does not specify the specific time intervals or frequency at which the medication can be taken. This lack of clarity could lead to confusion and potential overuse or underuse of the medication. Therefore, the nurse should clarify the time aspect of the prescription with the provider to ensure safe and appropriate administration of the medication.

After one half-life, the drug will have decayed by half of its original amount. Since the drug initially delivers 500 mg, after one half-life, only 250 mg will remain in the body.

The Joint Commission stated that a nurse needs to check two patient identifiers before giving a medication or doing a procedure on a patient. This is important to ensure that the right medication or procedure is given to the right patient, reducing the risk of errors and promoting patient safety. Checking two identifiers helps to verify the patient's identity and minimize the chances of mistaken identity.

The nurse is preparing to administer furosemide 80mg PO daily. The available concentration of the oral solution is 40mg/5mL. To calculate the amount of mL to administer, we can set up a proportion. Since the concentration is 40mg/5mL, we can set up the proportion as 80mg/x mL = 40mg/5mL. Cross-multiplying, we get 40mg * x mL = 80mg * 5mL. Simplifying, we get 40x = 400. Dividing both sides by 40, we find that x = 10 mL. Therefore, the nurse should administer 10 mL of the furosemide oral solution.

The order states to give 0.125 mg of the medication orally. Since the tablets in the pixis are in microgram strength, we need to convert milligrams to micrograms. There are 1000 micrograms in 1 milligram. Therefore, the right dose of the drug in micrograms is 125 mcg.

The nurse is preparing to administer dextrose 5% in water (D5W) at a rate of 750 mL over 6 hours. To calculate the mL/hr rate, we divide the total volume (750 mL) by the total time (6 hours). This gives us a rate of 125 mL/hr. Therefore, the nurse should set the IV pump to deliver 125 mL/hr.

The half-life of a drug is the time it takes for the concentration of the drug in the body to decrease by half. In this case, the drug has a half-life of 4 hours. This means that every 4 hours, the concentration of the drug will decrease by half.

At 0800, the drug level is measured as 200 mg/L. To find out at what time the drug level would be 50mg/L, we need to determine how many half-lives it would take for the concentration to decrease from 200 mg/L to 50 mg/L.

Since the half-life is 4 hours, it would take 4 hours for the concentration to decrease by half from 200 mg/L to 100 mg/L. Another 4 hours would be needed for the concentration to decrease from 100 mg/L to 50 mg/L.

Therefore, it would take a total of 8 hours, which is equivalent to 1600, for the drug level to be 50mg/L.

The nurse should administer 6.5 mL of acetaminophen per dose. This is calculated by dividing the desired dose (650 mg) by the concentration of the liquid (500 mg/5 mL) and then multiplying by the volume per dose (5 mL). This results in 6.5 mL, which is the amount the nurse should administer.

When one medication increases the metabolism of a second medication, it means that the second medication is being broken down and eliminated from the body at a faster rate. This can result in lower levels of the second medication in the bloodstream, leading to a decrease in its therapeutic effects. Therefore, the correct answer is "Decrease."

The order specifies to give 250 mcg (micrograms) of the medication orally. However, the tablets available in the medication dispensing cabinet are in milligram strength. To calculate the right dose in milligrams, we need to convert micrograms to milligrams. Since 1 milligram is equal to 1000 micrograms, 250 mcg is equal to 0.25 mg. Therefore, the correct dose of the drug in milligrams is 0.25 mg.

If a drug binds with an enzyme and prevents it from binding to its normal target cell, it will produce an enzyme interaction. This means that the drug is directly affecting the enzyme's ability to interact with its intended target, potentially inhibiting or altering its normal function. This can have various effects on the enzyme's activity and the overall biological processes it is involved in.

The correct way to write the amount is "1 mg". This is because "1 mg" is the standard abbreviation for one milligram, which is the unit of measurement for the medication ceftriaxone in this case.

The nurse will need to clarify the orders for Sitagliptin (Januvia) 50mg daily and Docusate (Colace) as needed for constipation because these orders require further clarification. It is important to determine the specific instructions for Sitagliptin (Januvia) as the frequency and timing of administration are not specified. Additionally, the order for Docusate (Colace) as needed for constipation needs clarification regarding the specific criteria for administration, such as the dosage and frequency based on the patient's condition.

When multiple medications are infusing through the same tubing, they must be compatible. This means that the medications should not interact with each other and cause any adverse effects or changes in their properties. Compatibility ensures that the medications can be safely administered together without compromising their effectiveness or causing harm to the patient.

Tetracycline antibiotics can form chelates with calcium, magnesium, iron, and aluminum ions, which can reduce the absorption of the medication and decrease its effectiveness. Milk products, such as milk, cheese, and yogurt, contain calcium and should be avoided while taking tetracycline antibiotics. Therefore, the nurse should remind the client to eliminate milk products from her diet for the duration of treatment.

Taking oral oxycodone and ibuprofen together can lead to an increase in the expected therapeutic effect of both medications. This is because ibuprofen can enhance the analgesic effects of opioids like oxycodone. The combination of these medications may result in better pain relief for the client. It is important for the nurse to monitor the client closely for any signs of increased sedation or respiratory depression, as these are potential adverse effects of opioids. However, the question does not mention any increase in adverse effects, so it can be inferred that the expected therapeutic effect is increased.

Highly protein-bound drugs have a tendency to bind to plasma proteins in the blood, which can limit their availability for interaction with other drugs. However, when two or more highly protein-bound drugs are administered together, there is a higher chance of competition for binding sites on the proteins, leading to potential drug-drug interactions. This can result in altered drug levels, efficacy, and safety. Therefore, highly protein-bound drugs increase the risk of drug-drug interactions.

When inserting an IV into an older adult client, a client taking anticoagulants, or a client with fragile veins, instructing the client to hold his hand below the level of his heart helps to reduce the pressure in the veins and prevent excessive bleeding. Holding the hand below the heart level promotes venous return and minimizes the risk of blood pooling or clotting at the IV insertion site. This position also helps to ensure a steady flow of blood into the veins, making it easier to insert the IV and reducing the chances of complications.

The nurse has an order for administering a medication to the patient. In order to legally prescribe medications for patients, the providers must have the legal authority to do so. Among the options given, physicians, dentists, physician assistants, and nurse practitioners have the legal authority to prescribe medications for patients. Physical therapists and pharmacists do not have the legal authority to prescribe medications.

Taking MAOIs (monoamine oxidase inhibitors) can affect the breakdown of tyramine, a substance found in certain foods. Tyramine normally gets broken down by the enzyme MAO in the liver, but when MAOIs are present, the breakdown process is inhibited. This can cause a buildup of tyramine in the body, leading to a sudden increase in blood pressure known as a hypertensive crisis. This can be a dangerous situation and can potentially result in serious health complications if not addressed promptly.

The nurse needs to be aware of the presence of food in the stomach, pH of the stomach, and form of drug preparation as factors that can affect the absorption of orally administered medications. The presence of food in the stomach can slow down the absorption process, as it may interfere with the dissolution of the drug. The pH of the stomach can also affect the absorption, as certain drugs are better absorbed in an acidic environment. The form of drug preparation, such as tablets, capsules, or liquids, can also impact the absorption rate.

For dosages less than 1, rounding to the nearest hundredth means rounding to the nearest two decimal places. This means that the number will be rounded to the nearest value that is two places after the decimal point. For example, if the dosage is 0.036, rounding to the nearest hundredth would give 0.04.

The nurse should make sure the manual IV infusion delivers 22 gtt/min because the client is receiving cefotaxime 1g in dextrose 5% in water (D5W) 100mL to infuse over 45 min. The drop factor shown on the package of IV tubing is 10gtt/mL. To calculate the infusion rate in gtt/min, we can use the formula: (Volume to be infused in mL / Time in min) x Drop factor. Plugging in the values, we get (100 mL / 45 min) x 10 gtt/mL = 22 gtt/min.

The appropriate nursing interventions related to administering eye drops to a client include asking the client to look up at the ceiling, dropping the medication into the center of the client's conjunctival sac, and instructing the client to close the eye gently. Looking up at the ceiling helps to expose the conjunctival sac, making it easier to administer the eye drops. Dropping the medication into the center of the conjunctival sac ensures proper absorption. Instructing the client to close the eye gently helps to distribute the medication and prevent it from leaking out.

The nurse should make sure the IV pump delivers 200 mL/hr because the client is receiving clindamycin 200mg over 30 minutes. The medication is available as 200mg in 100mL, so the entire dose needs to be infused over 30 minutes. To calculate the infusion rate in mL/hr, divide the volume (100mL) by the time (30 minutes) and multiply by 60 to convert minutes to hours. This gives a rate of 200 mL/hr.

The nurse needs to administer 15,000 units of heparin per dose. The concentration of heparin in the injection is 20,000 units/mL. To calculate the amount of mL needed, divide the desired dose (15,000 units) by the concentration (20,000 units/mL). This gives a result of 0.75 mL. Since the answer needs to be rounded to the nearest tenth, the nurse should administer 0.8 mL per dose.

The examples provided in the question are all different topical dosage routes. Inhaled refers to medications that are administered through inhalation, typically through a device like an inhaler. Nitroglycerin ointment is a topical medication that is applied directly to the skin. These examples demonstrate different ways in which medications can be delivered to the body through topical routes.

The nurse is preparing to administer haloperidol 2mg every 12 hours. The available dosage of haloperidol is 1mg per tablet. To administer 2mg, the nurse would need to give 2 tablets, as each tablet contains 1mg of haloperidol.

Shortness of breath, crackles heard in lungs, and distended neck veins are all signs of fluid overload. Shortness of breath occurs when there is excess fluid in the lungs, causing difficulty in breathing. Crackles heard in the lungs are abnormal lung sounds that indicate fluid accumulation in the airways. Distended neck veins are a result of increased pressure in the veins due to fluid overload. Hypotension and bradycardia are not indicative of fluid overload, as they are more commonly associated with hypovolemia or low fluid volume.

Phlebitis is the inflammation of a vein, often caused by an infection or irritation. The presence of a palpable, hard mass above the insertion site and pain at the site are both indicative of phlebitis. This suggests that there may be inflammation and possibly a clot forming at the site. The other options, tingling sensation below the insertion site, tachycardia, and cool, pale skin, are not specific to phlebitis and may be indicative of other conditions or reactions.

The nurse has a legal responsibility to maintain skill competency to ensure that they are able to safely administer medications to clients. They are also responsible for monitoring for adverse effects of the medications to ensure the client's safety. Additionally, the nurse must safeguard medications to prevent unauthorized access or use. Identifying the client's diagnosis is not a legal responsibility of the nurse, but rather a part of the nursing assessment and care planning process.

To calculate the amount of amoxicillin the nurse should administer per dose, we need to determine the total daily dose for the child. The child weighs 44 lb, so we need to convert this to kg by dividing by 2.2 (1 kg = 2.2 lb). Thus, the child weighs approximately 20 kg. The prescribed dose is 20 mg/kg/day, so the total daily dose for the child would be 20 mg/kg x 20 kg = 400 mg/day. Since the amoxicillin suspension is 250 mg/5 mL, we can calculate the mL per dose by dividing the total daily dose by the concentration of the suspension: 400 mg/250 mg x 5 mL = 8 mL. However, the question asks for the dose to be divided in equal doses every 12 hours, so the nurse should administer 8 mL divided by 2 = 4 mL per dose.

A complete medication history should include information about the patient's use of street drugs, history of surgeries, use of alcohol, use of herbal products, and family history. This information is important for the nurse to assess potential drug interactions, allergies, and any other factors that may impact the patient's medication regimen. Current laboratory work, although important for monitoring medication effectiveness and safety, is not specifically part of a medication history.

Drugs exert their actions on the body by interacting with receptors and inhibiting the action of a specific enzyme. Interacting with receptors allows drugs to bind to specific sites on cells, triggering a response or blocking a response. Inhibiting the action of a specific enzyme can prevent or slow down certain chemical reactions in the body, affecting various processes and functions. However, drugs do not make the cell perform a new function or directly alter metabolic chemical processes.

Medication dosages may need to be decreased in the case of liver failure because the liver is responsible for metabolizing medications, and if it is not functioning properly, the medication may not be metabolized effectively, leading to potential toxicity. Concurrent use of medication metabolized by the same pathway can also require a decrease in dosage as it can lead to competition for the same metabolic pathway, potentially resulting in higher levels of the medication in the body. Increased renal excretion, increased medication-metabolizing enzymes, and peripheral vascular disease do not directly impact medication metabolism and therefore would not require a decrease in dosage.

The nurse should include the data about the client's use of herbal teas, current health status, and food allergies before administering medications. The use of herbal teas is important to know as they may interact with certain medications and cause adverse effects. The current health status is necessary to assess the client's overall condition and determine if any precautions or adjustments need to be made in medication administration. Food allergies are crucial to identify to prevent any potential allergic reactions to medications.

The rate of medication metabolism can be influenced by various factors. Age plays a role as metabolism tends to slow down with age. The first-pass effect refers to the initial metabolism of a drug in the liver before it reaches the systemic circulation, which can affect the rate of metabolism. Nutritional status is important as certain nutrients are required for proper metabolism. An increase in certain medication-metabolizing enzymes can enhance the rate of metabolism. Similar metabolic pathways between drugs can also affect the rate of metabolism.