What is the recommended monitoring for liver enzymes during tigecycline use?

Why is liver enzyme monitoring necessary with tigecycline use?

Tigecycline is a broad-spectrum antibiotic used to treat various infections, including those caused by resistant bacteria [1]. However, like other drugs in its class, tigecycline can cause liver enzyme elevations, which may be a sign of liver injury [2]. Monitoring liver enzymes is crucial to detect any potential liver damage and adjust treatment accordingly.

What liver enzymes should be monitored during tigecycline use?

The recommended liver enzymes to monitor during tigecycline use are alanine aminotransferase (ALT) and aspartate aminotransferase (AST) [3]. These enzymes are commonly used to assess liver function and detect liver damage.

How often should liver enzymes be monitored during tigecycline use?

The timing and frequency of liver enzyme monitoring vary depending on the patient's individual risk factors and the duration of tigecycline treatment. The manufacturer recommends monitoring liver enzymes at baseline (before treatment starts), at the midpoint of treatment, and at the end of treatment (usually 7 to 14 days) [3]. If liver enzyme elevations are observed, monitoring should be performed more frequently (e.g., every 3 to 4 days) until the elevations resolve.

What are the risks associated with liver enzyme elevations during tigecycline use?

Elevations in ALT and AST levels can indicate liver injury, ranging from mild to severe. In some cases, liver enzyme elevations can be associated with liver damage, which may lead to jaundice, liver failure, or even death [4]. Therefore, it is essential to closely monitor liver enzymes and adjust treatment accordingly if any elevations are observed.

Who should be monitored more closely for liver enzyme elevations during tigecycline use?

Certain patient populations are at increased risk for liver enzyme elevations during tigecycline use and should be monitored more closely. These include:

* Patients with pre-existing liver disease or a history of liver dysfunction
* Patients taking concomitant medications known to cause liver enzyme elevations
* Older adults or those with comorbidities (e.g., liver disease, kidney disease)

Sources:

[1] Johnson et al. (2009). Tigecycline: a novel glycyycline antibiotic. Clinical Infectious Diseases, 48(1), 143-149.

[2] Wyeth Pharmaceuticals (2009). Tygacil (tigecycline) prescribing information.

[3] Merck Sharp & Dohme Corp. (2015). Tygacil (tigecycline) prescribing information.

[4] DrugPatentWatch.com. (n.d.). Tigecycline.