A 22-year-old woman comes to the dermatology clinic for the management of severe nodulocystic acne. Over the past six months, she has been treated with oral doxycycline and topical benzoyl peroxide, but her condition has worsened. She has deep, painful cystic lesions on her face, back, and chest that are beginning to scar. The physician plans to initiate oral isotretinoin. She has no other medical conditions. Which of the following are essential components of this patient's treatment and monitoring plan? (Select all that apply)
- Monthly human chorionic gonadotropin testingAnswer
- Baseline and periodic fasting lipid panelAnswer
- Baseline and periodic liver aminotransferasesAnswer
- DContinuation of oral doxycycline for the first month of therapy
- EBaseline and periodic monitoring of serum creatinine
Answer
The correct components are monthly human chorionic gonadotropin testing, baseline and periodic fasting lipid panels, and baseline and periodic liver aminotransferases.
Isotretinoin is a highly effective but high-risk medication for severe nodulocystic acne. Because it is highly teratogenic, strict adherence to a pregnancy prevention program is mandatory, requiring two negative baseline pregnancy tests and monthly human chorionic gonadotropin (hCG) testing during therapy. Additionally, isotretinoin can cause significant elevations in serum triglycerides and liver aminotransferases. Therefore, a fasting lipid panel and liver function tests must be checked at baseline and monitored periodically (typically after 1-2 months) to evaluate for hypertriglyceridemia and hepatotoxicity.
| Parameter / Action | Clinical Rationale |
|---|---|
| Monthly hCG | Severe teratogenicity (mandatory prevention program) |
| Fasting lipid panel | Risk of hypertriglyceridemia and pancreatitis |
| Liver aminotransferases | Risk of hepatotoxicity |
| Avoid tetracyclines | Prevents pseudotumor cerebri |
Step-by-Step Solution
Key Concept
Monitoring requirements for isotretinoin therapy include rigorous pregnancy testing, lipid panels, and liver function tests. Concurrent use of tetracyclines must be strictly avoided due to the compounded risk of pseudotumor cerebri.