Fluconazole Concentration in Serum

Why This Test Is Done

Your doctor may order this test if you’re taking fluconazole to treat infections like yeast infections (e.g., thrush, vaginal or skin infections), or if you have a fungal infection that doesn’t respond well to other treatments. It’s also used to monitor levels in people with kidney problems, who may need dose adjustments.

What to Expect Before the Test

No special preparation is needed. You’ll provide a blood sample, usually drawn from a vein in your arm. The test is quick and typically done in a lab setting. If you’re on a long-term antifungal medication, your doctor may schedule this test during or after your treatment.

How the Test Works

Blood is collected and sent to a lab where it’s analyzed to measure the exact amount of fluconazole present. The lab uses a sensitive method to detect even small traces of the medication in your bloodstream.

What the Results Mean

Results show the concentration of fluconazole in your blood. Your doctor will compare these results to your treatment plan to decide if your dose needs to be changed. Too little may mean the infection isn’t fully treated, while too much could cause side effects.