Source / episode info
- **Episode:**350
- **Title:**Divine Intervention Episode 350 – The Clutch Teratogen Podcast (+ Step 2CK/3 Course Reminder)
- **Published:**2021-11-21
- Source:Episode page
One-liner
Episode 350 is a comprehensive review of teratogens, covering drug classes (e.g., anti-epileptics, antifolates) and specific medications (isotretinoin, warfarin, MTX), while detailing the pathophysiology and clinical presentation of high-yield fetal syndromes like Fetal Alcohol Syndrome and diabetic embryopathy.
High-yield summary
- Isotretinoin: Powerful acne medication; teratogenic due to effects on hox chains, causing craniofacial defects (e.g., nasal hypoplasia). Requires strict contraception.
- Antifolates/Methotrexate (MTX): Inhibits dihydrofolate reductase, disrupting DNA synthesis and leading to neural tube defects (NTDs) and fetal demise.
- Warfarin: Anticoagulant; teratogenic due to interference with Vitamin K metabolism, causing fetal hemorrhage and bone stippling. Use Heparin or LMWH instead.
- Anti-epileptics (VPA, Carbamazepine): Valproic acid is particularly associated with NTDs and developmental issues in pregnancy.
- Gestational Diabetes: Hyperinsulinemia leads to multiple complications: Respiratory Distress Syndrome (RDS) due to surfactant inhibition, hypocalcemia, hypoglycemia, and Small Left Colon Syndrome (hypoplasia of the left colon).
- Abruptio Placentae: Strongly associated with sympathomimetics like cocaine use; causes placental ischemia and asymmetric IUGR.
Learning objectives
- Identify major teratogenic drug classes (e.g., antifolates, anti-epileptics) and their specific mechanisms of fetal harm.
- Differentiate the clinical features and underlying pathophysiology of common fetal syndromes (FAS, diabetic embryopathy).
- Select appropriate alternative medications during pregnancy to avoid known teratogens while maintaining therapeutic efficacy.
- Recognize high-risk obstetric scenarios (e.g., cocaine use, chronic hypertension) that lead to placental complications.
- Understand the management principles for neonatal complications arising from maternal metabolic states (e.g., gestational diabetes).