Module 11 Continued

Inquiry about any exciting milestones within the context discussed.
- Mention of Thanksgiving break and course pacing.
Transition to the discussion of Module 12 with intention to avoid self-taught modules.

Focus on concluding the study of liver disorders.
Comparison to previous renal disorders module regarding injury and drug effects.
Exploration of drug-induced liver injury (DILI) and the significance of liver function in drug metabolism.

Definition of DILI as the injury to liver cells resulting from drug toxicity.
Two main types of DILI:
- Hepatocellular Injury:
- Characterized by direct injury to liver cells.
- Cholestatic Injury:
- Related to dysfunction in the biliary tree.

Causes of repeated liver insults:
- Chronic Alcohol Use
- Autoimmune Causes
- Nutritional Excess: Example includes nonalcoholic fatty liver disease.
Consequences can arise from acute drug overdoses affecting liver function:
- Emphasis on acetaminophen as a primary example of a hepatotoxic agent.

Acetaminophen highlighted for potential acute liver damage.
Other drugs that may cause liver injury include:
- Amoxicillin (antibiotic)
- Valproic Acid (psychiatric medication)

Recognition that a newly initiated medication, alongside elevated liver function tests (LFTs) such as AST, ALT, ALP, and GGT, could suggest DILI.
The relevance of monitoring for both hepatocellular and cholestatic patterns of injury in patients starting high-risk medications.

Definition: Condition characterized by the yellowing of the skin and eyes due to increased bilirubin levels in the bloodstream.
Mechanism: Impaired bilirubin clearance from liver leads to accumulation in the bloodstream.
Notable personal anecdote shared about jaundice in infants and its clinical management.

The liver synthesizes various compounds:
- Albumin: Essential for maintaining plasma osmotic pressure.
- Bile: Includes bile acids, bile salts, and bilirubin, functioning in digestion.
- Clotting Factors: Important for coagulation and risk connected to bleeding in liver disease

Importance of elevated LFTs in the context of liver damage from drug exposure.
Clinical signs of liver dysfunction include:
- Elevated AST and ALT signify hepatocellular injury.
- Raised ALP and GGT indicate cholestatic injury.
Mention of spontaneous bacterial peritonitis and variceal hemorrhage as acute risks in liver disease.

Tests for Liver Function:
- AST (aspartate aminotransferase)
- ALT (alanine aminotransferase)
- PT/INR for coagulation status in relation to liver synthetic function.
- Monitoring function to detect signs of hepatic encephalopathy.

Recommendation to initiate lower dosages for liver patients to prevent toxicity due to:
- Reduced first pass metabolism.
- Inhibition of cytochrome P450 (CYP) enzymes due to liver dysfunction.
- Decrease in albumin concentration leading to excess free drug.

Prioritize safety when administering sedatives or opioids to liver disease patients to prevent confusion or mental status changes.
Constipation Management: Monitor for constipation to prevent ammonia buildup and encourage effective bowel movement.
Assess laboratory values comprehensively when dosing any new medication to ensure safety.
Patient education on the impact of everyday substances like alcohol and acetaminophen on liver health is essential.

DILI risks require careful management of any new drug scheme, particularly high first-pass metabolism drugs.
Emphasize collaboration with healthcare providers to tailor medication strategies according to liver health.
Outlook: Understanding liver pharmacology serves both acute management and broader clinical practice for safe medication administration.