Which of the following medication management practices should a nurse employ when teaching patients about chemotherapy for brain cancer?

Choice A rationale

Hypotension is typically not associated with this condition because the tumor hypersecretes catecholamines like epinephrine and norepinephrine. These substances induce potent vasoconstriction and increase systemic vascular resistance, leading to severe hypertension rather than low blood pressure. Patients often experience paroxysmal or sustained elevations in blood pressure that can exceed 200/110 mmHg. Therefore, hypotension would only occur in rare cases of catecholamine depletion or during specific medical crises.

Choice B rationale

Tachycardia is a classic manifestation resulting from the stimulatory effects of excessive catecholamines on cardiac beta-1 adrenergic receptors. This stimulation increases the heart rate and myocardial contractility significantly. The patient may report a racing heart or a rapid pulse even while at rest. This sympathetic overactivity is a hallmark of the clinical triad, which also includes headache and diaphoresis, and it requires careful monitoring to prevent potential cardiac complications or arrhythmias.

Choice C rationale

Headaches are one of the most common presenting symptoms and are usually described as severe, pounding, and sudden in onset. This occurs due to the acute and dramatic increase in systemic arterial blood pressure caused by the sudden release of catecholamines from the adrenal medulla or extra-adrenal chromaffin tissue. The resulting cerebral vasodilation and increased intracranial pressure contribute to the intense pain. It is often the symptom that prompts the patient to seek medical evaluation.

Choice D rationale

Weight gain is unlikely because the chronic excess of catecholamines increases the basal metabolic rate and promotes glycogenolysis and lipolysis. Most patients actually experience unexplained weight loss despite having a normal or increased appetite. The hypermetabolic state induced by the tumor mimics hyperthyroidism in some aspects, leading to increased energy expenditure. Therefore, significant weight gain would be an atypical finding and might suggest a different underlying metabolic or endocrine disorder.

Choice E rationale

Palpitations occur as a direct result of the chronotropic and inotropic effects of catecholamines on the myocardium. The patient becomes acutely aware of their heartbeat, which they often describe as a forceful thumping or fluttering in the chest. These episodes can occur spontaneously or be triggered by physical exertion, emotional stress, or pressure on the tumor. Palpitations are frequently accompanied by anxiety or a sense of impending doom during a catecholamine surge.

Choice F rationale

Tremors are caused by the overstimulation of the nervous system and skeletal muscles by circulating epinephrine and norepinephrine. This increased sympathetic tone leads to fine or coarse muscle tremors, often visible in the hands. The excessive stimulation of beta-2 receptors in the skeletal muscles contributes to this fine motor instability. Tremors are frequently associated with other signs of autonomic hyperactivity, such as diaphoresis and nervousness, forming part of the systemic response to the tumor.

Choice A rationale

Brain tumors and their subsequent treatments, including chemotherapy and radiation, significantly increase the risk of focal or generalized seizures due to cortical irritation, peritumoral edema, or changes in blood-brain barrier permeability. Levetiracetam is frequently used as a prophylactic or therapeutic agent because it has a favorable side effect profile and minimal interactions with many chemotherapy agents. Preventing seizures is a priority to maintain patient safety, prevent secondary brain injury, and improve quality of life.

Choice B rationale

Minimizing fluid intake is contraindicated and potentially dangerous during chemotherapy. Many chemotherapeutic agents and the breakdown of tumor cells can be nephrotoxic. Maintaining adequate hydration is essential to ensure proper renal clearance of drugs and to prevent the crystallization of metabolic byproducts in the renal tubules. While managing cerebral edema is important, dehydration can lead to hypotension, electrolyte imbalances, and increased toxicity, which can actually exacerbate headaches and other systemic side effects of the treatment.

Choice C rationale

Effective nursing care for brain cancer patients must be holistic, addressing both physiological and psychosocial needs. A diagnosis of brain cancer often carries a heavy emotional burden, including anxiety, depression, and fear regarding cognitive decline or personality changes. Focusing solely on the pharmacological regimen ignores the impact of the disease on the patient's mental health and social support systems. Comprehensive education should include resources for counseling and support groups to help patients navigate the complex stressors.

Choice D rationale

Patients should never be encouraged to discontinue prescribed medications, especially anticoagulants, without direct medical supervision. Chemotherapy and malignancy itself create a hypercoagulable state, increasing the risk of deep vein thrombosis and pulmonary embolism. Suddenly stopping blood thinners could lead to life-threatening thromboembolic events. Any adjustments to a medication regimen prior to starting chemotherapy must be coordinated by the oncology team and the prescribing physician to balance the risks of bleeding versus the risks of clotting.