Progressing major depressive disorder with medication side effects - Nursing Case Study

Pathophysiology

• Primary mechanism: Imbalance of neurotransmitters like serotonin, norepinephrine, and dopamine leads to disrupted neural communication, affecting mood regulation and contributing to symptoms of depression.

• Secondary mechanism: Altered hypothalamic-pituitary-adrenal (HPA) axis function results in elevated cortisol levels, which can exacerbate mood disturbances and lead to structural changes in brain regions like the hippocampus.

• Key complication: Medication side effects, such as gastrointestinal disturbances or sexual dysfunction, can hinder compliance and potentially worsen depressive symptoms, complicating management and recovery.

Patient Profile

Demographics:

42, female, school teacher

History:

• Key past medical history: Major depressive disorder diagnosed 2 years ago, hypertension, hypothyroidism

• Current medications: Sertraline 100 mg daily, Levothyroxine 75 mcg daily, Lisinopril 10 mg daily

• Allergies: Penicillin

Current Presentation:

• Chief complaint: Increasing feelings of hopelessness and fatigue

• Key symptoms: Persistent sadness, difficulty concentrating, insomnia, nausea, dizziness, and weight gain

• Vital signs: Blood pressure 150/95 mmHg, heart rate 105 bpm, temperature 98.6°F, respiratory rate 18 breaths per minute

Section 1

During a follow-up appointment, the patient reports that her symptoms have progressively worsened over the past month. Notably, she experiences increased dizziness and persistent nausea despite adherence to her prescribed medication regimen, raising concerns about the side effects of her current treatment plan. A physical examination reveals pallor and mild dehydration, possibly attributed to her reluctance to eat due to nausea. Her blood pressure remains elevated at 155/98 mmHg, with a heart rate of 110 bpm, indicating uncontrolled hypertension and tachycardia. These findings suggest that the side effects of sertraline, particularly nausea and dizziness, might be impacting her quality of life and could be contributing to poor adherence, aggravating her depressive symptoms.

Laboratory tests reveal elevated serum TSH levels at 6.5 mIU/L, suggesting that her hypothyroidism is not optimally managed, which could further contribute to her fatigue and depressive symptoms. Additionally, her cortisol levels are found to be elevated, consistent with HPA axis dysregulation. These results indicate the need for a comprehensive review of her medication regimen and consideration of potential interactions or dose adjustments. The psychiatrist and primary care physician collaborate to explore alternative antidepressants with a more favorable side effect profile and adjust her levothyroxine dosage to better manage her thyroid function.

The patient is educated on the potential benefits and side effects of new medications, and a plan is made to introduce bupropion as an alternative to sertraline, given its lower propensity to cause nausea and potential positive effects on energy levels. The healthcare team emphasizes the importance of monitoring her blood pressure closely and suggests lifestyle modifications to address her hypertension. The patient expresses understanding and a willingness to try the new treatment approach, with a follow-up scheduled in two weeks to evaluate her response and make further adjustments as necessary. This plan aims to improve her adherence, alleviate side effects, and better manage her depressive symptoms, ultimately enhancing her overall quality of life.

Section 2

Two weeks after the medication change, the patient returns for a follow-up appointment. She reports a slight improvement in energy levels and mood since starting bupropion, with a noticeable reduction in nausea, which has allowed her to resume eating regular meals. However, she continues to experience episodes of dizziness, particularly when standing up quickly, and still feels fatigued, albeit to a lesser extent. Her blood pressure remains elevated at 150/95 mmHg, with a heart rate of 105 bpm, suggesting that her hypertension is still not well-controlled. On physical examination, she appears less pale, and her hydration status has improved, but she exhibits orthostatic hypotension, with a significant drop in blood pressure upon standing.

Laboratory tests reveal that her TSH levels have decreased to 4.2 mIU/L following the adjustment of her levothyroxine dosage, indicating better management of her hypothyroidism. However, her serum sodium levels are now on the lower end of normal at 134 mmol/L, raising concerns about potential hyponatremia, possibly linked to the recent changes in her medication regimen or underlying conditions. Her cortisol levels remain elevated, suggesting persistent HPA axis dysregulation, which could be perpetuating her symptoms of dizziness and fatigue.

Given these findings, the healthcare team decides to further refine her treatment plan. They consider adjusting her antihypertensive therapy, perhaps introducing a medication that can also address orthostatic symptoms. The possibility of adding a small dose of fludrocortisone or midodrine is discussed to counteract orthostatic hypotension. Additionally, the team recommends increasing her fluid intake and monitoring her sodium levels closely to prevent hyponatremia. The patient expresses relief at the reduction in nausea and remains hopeful for continued improvement. A follow-up is scheduled in another two weeks to assess the effectiveness of these additional interventions and make any necessary adjustments to her treatment plan.

Section 3

Two weeks later, the patient returns for her scheduled follow-up appointment, eager to discuss the recent adjustments to her treatment plan. She reports feeling a moderate improvement in her overall energy levels, and her mood has become more stable. The episodes of dizziness have lessened in frequency, although they occasionally persist when she stands up too quickly. Importantly, she notes fewer episodes of lightheadedness since increasing her fluid intake, and she expresses appreciation for the comprehensive approach in managing her symptoms. Despite these improvements, she still experiences some fatigue, which is concerning given the ongoing demands of her daily life.

On examination, her blood pressure has improved to 140/90 mmHg, and her heart rate has stabilized at 92 bpm. Her orthostatic hypotension, however, remains evident, with a drop of 15 mmHg in systolic blood pressure upon standing. Her laboratory results reveal that her sodium levels have stabilized at 136 mmol/L, indicating a positive response to the increased fluid intake and careful monitoring. Notably, her cortisol levels have decreased slightly, but they remain elevated, suggesting a need for continued vigilance in managing potential HPA axis dysregulation.

Given these findings, the healthcare team decides to continue with the current regimen while introducing a low dose of fludrocortisone to further address the orthostatic hypotension. They emphasize the importance of maintaining adequate hydration and continue to monitor her sodium levels closely. The patient is counseled on recognizing signs of electrolyte imbalance and instructed to report any significant changes in her symptoms. With these additional measures in place, the team schedules another follow-up in two weeks to assess her progress and determine if further adjustments are necessary.

Section 4

Two weeks later, the patient returns for her follow-up appointment with a cautiously optimistic outlook. She reports that the addition of fludrocortisone has significantly reduced her episodes of dizziness, and she no longer experiences a noticeable drop in blood pressure upon standing. Despite this improvement, she mentions a new onset of mild ankle swelling, which she had not experienced before. Her fatigue persists, albeit to a slightly lesser extent, and she continues to manage her daily activities with effort.

On examination, her blood pressure remains stable at 138/88 mmHg, and her heart rate is a steady 88 bpm. The orthostatic hypotension has largely resolved, with only a minimal systolic drop of 5 mmHg upon standing. However, her laboratory results reveal a mild elevation in serum sodium, now at 142 mmol/L, suggesting a delicate balance that needs close monitoring. Additionally, her cortisol levels, although slightly lower, continue to indicate an ongoing mild dysfunction in the HPA axis.

Given the new symptom of ankle swelling, the healthcare team deliberates the possibility of fluid retention as a side effect of fludrocortisone. They decide to slightly reduce the fludrocortisone dosage and closely monitor her for any further signs of fluid overload or electrolyte imbalance. The team reinforces the importance of maintaining hydration and advises the patient to elevate her legs when resting to alleviate the swelling. They schedule another follow-up in two weeks to reassess her symptoms and adjust her treatment plan as necessary, ensuring her safety and continued progress in managing her major depressive disorder and its complications.

Section 5

Two weeks later, the patient returns for her scheduled follow-up, expressing mild concern over persistent ankle swelling, which has not subsided despite the dosage adjustment of fludrocortisone. She also reports experiencing occasional headaches, which she describes as dull and persistent, occurring primarily in the afternoons. Her energy levels remain low, and she continues to exert significant effort in managing her daily activities, although her mood appears slightly improved, indicating some stabilization in her depressive symptoms.

During the physical examination, her vital signs are within acceptable limits, with a blood pressure reading of 136/85 mmHg and a heart rate of 86 bpm. However, a closer inspection reveals mild pitting edema around her ankles, with no signs of skin breakdown or severe discomfort. Her laboratory results indicate that her serum sodium level has increased slightly to 144 mmol/L, raising concerns about potential hypernatremia. Additionally, her blood urea nitrogen (BUN) and creatinine levels remain within normal range, suggesting that renal function is not significantly impacted at this time.

The healthcare team considers the implications of these findings, particularly the risk of exacerbating fluid retention and electrolyte imbalance. They decide to further adjust her fludrocortisone dosage and introduce a low-dose diuretic to help manage the edema, while closely monitoring her electrolyte levels. The team discusses the importance of adhering to a balanced diet, ensuring adequate but not excessive fluid intake, and scheduling more frequent follow-ups to promptly address any emerging complications. This proactive approach aims to maintain her progress in managing both her depressive disorder and the associated side effects, ultimately improving her overall quality of life.