NCLEX-RN Pharmacological and Parenteral Therapies Summary

Heparin is a high-alert blood thinner. When a client on heparin shows signs of serious bleeding, the drug is stopped and protamine sulfate may be given. Protamine binds to heparin in the blood and makes it inactive within minutes.

It helps to remember the pairs:

1. Heparin → protamine sulfate
2. Warfarin → vitamin K (phytonadione)
3. Opioids → naloxone
4. Benzodiazepines → flumazenil

Wrong choices

• "Vitamin K": this reverses warfarin, not heparin. It works slowly, over hours.
• "Naloxone": reverses opioids such as morphine. It has no effect on bleeding.
• "Flumazenil": reverses benzodiazepines such as lorazepam. It has no effect on bleeding.

Warfarin slows the liver's use of vitamin K to make clotting factors. Its effect is measured with the prothrombin time (PT), reported as the INR (international normalized ratio). The INR lets results be compared between labs. The provider sets the target INR for each client, and the dose is adjusted to keep the client in that range.

An INR above the target means a higher bleeding risk. An INR below the target means the client is less protected from clots.

Wrong choices

• "aPTT": this is used to monitor IV heparin, not warfarin. Mixing up these two tests is a common error.
• "Platelet count": important to watch with heparin (for heparin-induced thrombocytopenia), but it does not show warfarin's effect.
• "Serum potassium": not related to warfarin's effect on clotting.

Digoxin slows the heart rate and makes each heartbeat stronger. Because it slows the heart, the nurse listens to the apical pulse (over the heart, at the apex) for one full minute before every dose. A common rule for adults is to hold the dose and notify the provider if the apical pulse is below 60 beats per minute, unless the provider has given a different limit.

A full minute is needed because clients on digoxin often have irregular rhythms, and a 15- or 30-second count can be wrong.

Wrong choices

• "Blood pressure in both arms": blood pressure is useful, but it is not the key check for digoxin.
• "Weigh the client": daily weight is good for heart failure, but it is not the safety check right before digoxin.
• "Fingerstick blood glucose": this is the check before insulin, not digoxin.

Opioids such as morphine can slow down the breathing center in the brain. This is called respiratory depression, and it is the most dangerous side effect. An adult breathing only 8 times per minute is not getting enough air. The nurse acts right away: tries to wake the client, checks oxygen saturation, stops any further opioid, and gets help. Naloxone may be needed.

The nurse usually checks sedation level too, because heavy sleepiness often comes before slow breathing.

Wrong choices

• "Mild itching": common and bothersome, but not life-threatening.
• "No bowel movement since yesterday": constipation is expected with opioids and is managed over time, not as an emergency.
• "Pain rated 3": this shows the medicine is working.

The most serious transfusion reactions, such as a reaction from the wrong blood type, usually show up early, often within the first 15 minutes. So the nurse starts the blood slowly and stays with the client during this time, watching for fever, chills, back pain, trouble breathing, hives, or a drop in blood pressure. Vital signs are taken before the transfusion and again at about 15 minutes.

Wrong choices

• "Same line as dextrose": only normal saline (0.9% sodium chloride) is used with blood. Dextrose can damage red blood cells.
• "Return in 1 hour": leaving during the riskiest time is unsafe.
• "Speed up the rate": the rate is kept slow at first so a reaction can be caught before much blood is given.

Leafy green vegetables (spinach, kale, collards) are high in vitamin K, which works against warfarin. The client does not need to avoid them. What matters is eating about the same amount from week to week, so the dose stays balanced and the INR stays steady.

Wrong choices

• "Stop eating all green vegetables": not needed, and suddenly cutting vitamin K can make the INR go too high.
• "Take two pills the next day": doubling a dose can raise the bleeding risk. The client should follow the provider's instructions for a missed dose and not double up.
• "Aspirin for a headache": aspirin also raises bleeding risk. Clients on warfarin should check with the provider before taking aspirin or other over-the-counter pain medicines such as ibuprofen.

Chills, fever, and back pain early in a transfusion suggest a transfusion reaction, possibly a serious one where the body attacks the donor red blood cells. The first action is always to stop the transfusion so no more blood enters the body.

After stopping it, the nurse:

1. Keeps the IV open with normal saline using new tubing.
2. Stays with the client and checks vital signs.
3. Notifies the provider and the blood bank.
4. Sends the blood bag and tubing back, and collects blood and urine samples as directed.

Wrong choices

• "Slow the rate": the client would still be receiving the blood that may be causing the reaction.
• "Give acetaminophen": may be ordered later, but it does not stop the cause.
• "Call the blood bank": this is needed, but after the transfusion is stopped.

Insulin lispro starts to work in about 15 minutes. So it is given within 15 minutes before a meal (or right at the start of the meal), and the nurse makes sure the food is actually there. If the insulin is given and the meal is delayed, blood sugar can drop too low (hypoglycemia).

Wrong choices

• "One hour before the meal": too early. The insulin would start lowering blood sugar long before food arrives.
• "At bedtime": rapid-acting insulin is matched to meals. Long-acting insulin is the type often given once a day.
• "Only if glucose is over 300": a scheduled mealtime dose is given as prescribed; it is not saved for very high readings.

Lisinopril is an ACE inhibitor (a blood pressure medicine whose generic name ends in "-pril"). A rare but dangerous side effect is angioedema: swelling of the lips, tongue, face, or throat. The swelling can block the airway. The nurse acts right away: checks the airway and breathing, gets help, and the drug is stopped.

Wrong choices

• "A dry, tickling cough": a common, annoying side effect. It should be reported, but it is not an emergency.
• "Light-headed when standing": can happen when starting a blood pressure drug. The nurse teaches the client to get up slowly.
• "128/78 mm Hg": shows the medicine is working.

The right client is the first of the medication "rights." The nurse uses two identifiers, such as the client's full name and date of birth, and compares them with the wristband and the medication record. Asking the client to say the information is safer than asking a yes/no question, because a confused or hard-of-hearing client may just say "yes."

Wrong choices

• "Room and bed number": clients move rooms. A location is never an identifier.
• "Are you Mr. Lee?": a yes/no question invites a wrong "yes."
• "Sign above the bed": signs may be out of date and are not tied to the client's body like a wristband.