Commonly confused in nursing
Hypothyroidism vs Hyperthyroidism
The NCLEX hands you a set of vitals and a symptom cluster — bradycardia with constipation or tachycardia with diarrhea — and expects you to pick the correct thyroid disorder in seconds. Reversing even one finding (like temperature intolerance) leads you to the wrong diagnosis and the wrong intervention.
Which One Is It?
1 / 4 · score 0The finding: ↑ TSH (primary)
Side-by-side comparison
Side-by-side2 compared
Focus
Dimension
Hypothyroidism
Hyperthyroidism
Pathophysiology & risk
- ↓ Thyroid hormone, slowed metabolism
- Hashimoto's, post-RAI/thyroidectomy
- ↑ Thyroid hormone, fast metabolism
- Graves' autoimmune (TSI antibodies)
Signs & symptoms
- Bradycardia, cold intolerance
- Weight gain, constipation
- Lethargy, depression
- Dry coarse skin, periorbital edema
- ★Exophthalmos (Graves')
- Tachycardia/AFib, heat intolerance
- Weight loss, diarrhea
- Anxiety, tremor, insomnia
Diagnostics & labs
- ★↑ TSH (primary)
- ↓ T3, ↓ T4
- ★↓ TSH (suppressed)
- ↑ T3, ↑ T4
Nursing priorities
- Provide warmth
- Monitor for bradycardia, hypotension
- Prevent constipation
- Cool, low-stimulation environment
- Cardiac monitoring (AFib)
- Eye protection (lubricate eyes)
Treatment & meds
- Levothyroxine daily, empty stomach
- Lifelong replacement
- Methimazole or PTU
- Beta-blocker for symptoms
- Radioactive iodine or thyroidectomy
Patient teaching
- Same time daily, 30–60 min before food
- Lifelong therapy, never stop
- Report palpitations (dose too high)
- ★Report sore throat or fever
- RAI radiation precautions
- Wear sunglasses, protect eyes
Red flags — escalate
- Myxedema coma: hypothermia, ↓ LOC
- Passive rewarming (blankets)
- IV levothyroxine
- Thyroid storm: high fever, tachycardia
- Cooling, beta-blocker, PTU, iodine
Complications
- Myxedema coma
- Pericardial effusion
- Atrial fibrillation
- High-output heart failure
- Osteoporosis
Pathophysiology & risk
Hypothyroidism
- ↓ Thyroid hormone, slowed metabolism
- Hashimoto's, post-RAI/thyroidectomy
Hyperthyroidism
- ↑ Thyroid hormone, fast metabolism
- Graves' autoimmune (TSI antibodies)
Signs & symptoms
Hypothyroidism
- Bradycardia, cold intolerance
- Weight gain, constipation
- Lethargy, depression
- Dry coarse skin, periorbital edema
Hyperthyroidism
- ★Exophthalmos (Graves')
- Tachycardia/AFib, heat intolerance
- Weight loss, diarrhea
- Anxiety, tremor, insomnia
Diagnostics & labs
Hypothyroidism
- ★↑ TSH (primary)
- ↓ T3, ↓ T4
Hyperthyroidism
- ★↓ TSH (suppressed)
- ↑ T3, ↑ T4
Nursing priorities
Hypothyroidism
- Provide warmth
- Monitor for bradycardia, hypotension
- Prevent constipation
Hyperthyroidism
- Cool, low-stimulation environment
- Cardiac monitoring (AFib)
- Eye protection (lubricate eyes)
Treatment & meds
Hypothyroidism
- Levothyroxine daily, empty stomach
- Lifelong replacement
Hyperthyroidism
- Methimazole or PTU
- Beta-blocker for symptoms
- Radioactive iodine or thyroidectomy
Patient teaching
Hypothyroidism
- Same time daily, 30–60 min before food
- Lifelong therapy, never stop
- Report palpitations (dose too high)
Hyperthyroidism
- ★Report sore throat or fever
- RAI radiation precautions
- Wear sunglasses, protect eyes
Red flags — escalate
Hypothyroidism
- Myxedema coma: hypothermia, ↓ LOC
- Passive rewarming (blankets)
- IV levothyroxine
Hyperthyroidism
- Thyroid storm: high fever, tachycardia
- Cooling, beta-blocker, PTU, iodine
Complications
Hypothyroidism
- Myxedema coma
- Pericardial effusion
Hyperthyroidism
- Atrial fibrillation
- High-output heart failure
- Osteoporosis
★ marks the fact that sets a column apart.
Clinical Pearl
Hypo = cold, slow, heavy, constipated. Hyper = hot, fast, thin, diarrhea — opposites across every system.
Play this as a game — free
Drill Hypothyroidism vs Hyperthyroidism in Swipe Right & Speed Sort. Free to start, no card required.
More commonly confused pairs
Keep going
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