The health care provider orders a hypertonic crystalloid IV solution for a 70-year-old patient. Which solution will the nurse hang?

Correct Answer: D

Rationale: A hypertonic solution has a higher solute concentration than plasma, drawing fluid into the intravascular space. 5% dextrose in 0.9% sodium chloride (D) is hypertonic. Lactated Ringer's (A) and 0.45% sodium chloride (B) are hypotonic, while 0.9% sodium chloride (C) is isotonic. Hypertonic solutions are used to treat severe hyponatremia or cerebral edema but must be administered cautiously to avoid fluid overload.

Correct Answer: B

Rationale: Propranolol, a beta-blocker, prevents migraines but requires consistent use'stopping if migraines cease risks rebound, showing a teaching gap. Pulse checking monitors bradycardia. Tiredness and orthostasis are expected. Abrupt cessation can worsen migraines, critical in prophylaxis where steady-state matters, making B the statement needing correction.

Correct Answer: C

Rationale: The fundamental action of drugs that can be used as a substitute for what is lacking in the body falls under the category of Replacement. In medical terms, replacement therapy is a type of treatment that involves replacing a hormone or other important substance that is deficient or lacking in the body. For example, individuals with hypothyroidism are often prescribed levothyroxine as a replacement therapy to make up for the thyroid hormone deficiency in their body. Similarly, insulin is used to replace the deficient insulin in individuals with diabetes. Therefore, when drugs are administered to compensate for a deficiency or lack of a specific substance in the body, they are categorized under the fundamental action of Replacement.

Correct Answer: B

Rationale: A. Stroke is not typically associated with an adverse reaction to Montelukast. The most common adverse reactions include neuropsychiatric events such as mood changes, suicidal thoughts/behaviors, and allergic reactions affecting the skin and mucous membranes.

Correct Answer: C

Rationale: Carbamazepine induces cytochrome P450 (e.g., CYP3A4), accelerating metabolism of drugs like topiramate, tiagabine, and lamotrigine, reducing their levels and complicating dosing. Levetiracetam, excreted renally with minimal hepatic metabolism, avoids P450 interactions, maintaining stable levels when added to carbamazepine. Zonisamide interacts via induction. Levetiracetam's lack of pharmacokinetic interference, per clinical pharmacology, makes it the safest adjunct, enhancing control without altering carbamazepine's efficacy.