Levothyroxine overtreatment

PTCB PTCE
Medications
Select all that apply
Difficulty 3 of 5

Question

Which findings associated with levothyroxine overtreatment should a pharmacy technician relay to the pharmacist? Select all that apply.

Increased heart rate✓ Correct

The reference lists a faster heart rate with overtreatment.
Angina✓ Correct

Excess levothyroxine can precipitate angina.
Cardiac arrhythmia✓ Correct

Arrhythmias can occur with overtreatment.
Nasal mucosa effects✗ Incorrect

The reference lists nasal mucosa effects with calcitonin spray.
Lactic acidosis✗ Incorrect

The reference associates lactic acidosis with metformin accumulation.

Answer

A. Increased heart rate · B. Angina · C. Cardiac arrhythmia

Rationale

Too much levothyroxine can produce effects resembling excess thyroid activity, including a faster heart rate and cardiac complications. The technician should convey these reported findings to the pharmacist.

RememberExcess levothyroxine can cause cardiac symptoms.

Sources

Sources marked “Adapted from” are licensed under CC BY 4.0. We changed the material: its facts are rewritten into an original question, answer options and rationale. The original authors and publishers do not endorse SwipeExam.

Adapted from Open RN Nursing Pharmacology, 2nd edition: Chapter 9 Endocrine System Open RN (Chippewa Valley Technical College) · License: CC BY 4.0 · Retrieved November 2, 2026 · Thyroid and Osteoporosis Medication Classes › Thyroid Replacement Medication; Thyroid and Osteoporosis Medication Classes › Osteoporosis: Calcium + Vitamin D; Antihyperglycemic Medication: Oral Antihyperglycemics › Metformin · 2nd edition, 2023

Last verified: November 5, 2026 2 independent automated checks Question ptcb-m-00062, version 1

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