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Difficulty: MediumMonitoring and Treatment Evaluation

A 19-year-old male is evaluated in the dermatology clinic for severe, scarring nodulocystic acne on his face, chest, and back. He has not experienced meaningful improvement despite a 4-month trial of oral doxycycline and topical tretinoin. The physician decides to initiate therapy with oral isotretinoin. The patient has no other medical history and takes no other medications. Which of the following evaluations are essential to perform prior to initiating and periodically during this specific pharmacotherapy? (Select 2)

  1. Fasting lipid panelAnswer
  2. Hepatic function panelAnswer
  3. C
    Complete blood count with differential
  4. D
    Prothrombin time and international normalized ratio
  5. E
    Transthoracic echocardiography

Answer

The essential baseline and ongoing evaluations for this patient are a fasting lipid panel and a hepatic function panel.
Oral isotretinoin is a highly effective treatment for severe nodular acne, but it carries a risk of significant adverse effects. The most common laboratory abnormalities associated with isotretinoin therapy are hypertriglyceridemia, hypercholesterolemia, and elevated liver transaminases. Therefore, baseline and periodic monitoring of a fasting lipid panel and hepatic function panel (AST, ALT, bilirubin) are universally required to prevent complications such as acute pancreatitis or hepatotoxicity. For female patients of childbearing potential, strict pregnancy testing is also mandatory due to severe teratogenicity, but this is not applicable to this male patient.

Step-by-Step Solution

1
Identify the high-risk pharmacotherapy indicated by the clinical vignette.
The patient is starting oral isotretinoin for severe, refractory nodulocystic acne.
Recognizing the specific medication is required to determine the appropriate monitoring protocol.
2
Determine the primary physiological adverse effects associated with the selected medication.
Oral isotretinoin frequently causes hypertriglyceridemia and elevated liver transaminases.
Understanding the drug's toxicity profile allows the clinician to select targeted, highly specific surveillance parameters.
3
Select the corresponding diagnostic evaluations for the identified physiological risks.
A fasting lipid panel and a hepatic function panel are chosen to monitor for these metabolic and hepatic derangements.
These tests detect asymptomatic adverse effects before severe complications, such as acute pancreatitis or overt hepatotoxicity, can occur.

Key Concept

Monitoring parameters for oral isotretinoin therapy
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Topics

Monitoring and Treatment Evaluation

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