No, Celebrex and Aleve Do Not Cause Low ALT Levels
Neither celecoxib (Celebrex) nor naproxen (Aleve) cause abnormally low ALT levels such as 9 U/L. In fact, these NSAIDs are associated with elevated liver enzymes, not decreased ones.
What These Medications Actually Do to Liver Enzymes
Expected Hepatic Effects of NSAIDs
Both Celebrex and Aleve can cause elevations in liver enzymes, not reductions 1:
- Borderline elevations (1.2-3× upper limit of normal) occur in approximately 6% of celecoxib users
- Notable elevations (≥3× upper limit of normal) of ALT or AST occur in approximately 0.2% of celecoxib users 1
- Similar patterns are seen with naproxen and other NSAIDs 2, 3
The FDA drug label for Celebrex explicitly warns about hepatotoxicity, stating that rare cases of severe hepatic reactions including jaundice, fulminant hepatitis, liver necrosis, and hepatic failure have been reported 1.
Monitoring Requirements
Guidelines recommend monitoring liver enzymes when using these medications 4:
- Check ALT and AST at baseline and periodically during therapy
- The threshold for concern is ALT or AST >3 times the upper limit of normal
- This represents liver injury, not suppression
What Actually Causes Low ALT Levels
An ALT of 9 U/L is abnormally low (normal range: 19-25 IU/L in women, 29-33 IU/L in men) 5. Low ALT levels are associated with:
Clinical Significance of Low ALT
- Increased all-cause mortality in certain populations 6
- Increased cardiovascular mortality 6
- Potential marker of frailty or poor nutritional status
- In specific contexts (ALDH2*2 carriers consuming alcohol), paradoxically low ALT may mask liver injury 7
Common Causes of Low ALT
- Advanced age
- Malnutrition or sarcopenia
- Vitamin B6 deficiency
- Chronic kidney disease
- Certain genetic variants
Clinical Recommendation
Your low ALT of 9 is not caused by Celebrex or Aleve. Instead, investigate other causes:
- Assess nutritional status - Check albumin, vitamin B6, overall protein intake
- Evaluate muscle mass - Low ALT can reflect decreased muscle mass (sarcopenia)
- Review complete medication list - Look for other potential causes
- Consider age-related changes - Elderly patients naturally have lower ALT levels
Important caveat: While these NSAIDs don't lower ALT, they do carry significant risks including gastrointestinal bleeding, cardiovascular events, and actual hepatotoxicity with elevated liver enzymes 8, 3, 9. If you're taking both medications simultaneously, this combination increases gastrointestinal bleeding risk 2-4 fold 8, 9.
The low ALT warrants investigation for its own clinical significance, particularly given its association with increased mortality in some populations 6, but it is definitively not caused by your NSAID use.