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Valganciclovir (Serum/Plasma Concentration)

Published: August 9, 2026Updated: August 17, 2026

This test measures the amount of valganciclovir, a medication used to treat certain viral infections, in your blood.

Quick summary

["Knowing your medication levels helps your doctor monitor your treatment and adjust doses as needed."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 17, 2026Editorial policy

Key facts at a glance

LOINC
73093-7
Short code
valGANciclovir ind plt IgG SerPl Ql FC
Synonyms
valGANciclovir ind plt IgG SerPl Ql FC
Category
hematology
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Critical range
0.5 N/A – —
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

Why This Test Is Done

Your healthcare provider may order this test if you’re taking valganciclovir to ensure it’s working properly and to avoid potential side effects. It helps prevent overly high or low levels that could affect your health.

What to Expect Before the Test

No special preparation is needed. You’ll typically have a blood sample drawn from a vein in your arm, similar to other blood tests.

What the Results Mean

Results are used to guide your treatment plan. If levels are too high, your dose may need to be reduced. If too low, your dose may be increased. Your doctor will discuss these findings with you.

Possible Side Effects or Considerations

While rare, high levels of valganciclovir can increase risks of side effects like nausea, hair loss, or kidney problems. Your doctor will watch for these and adjust your care accordingly.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

Clinical Significance

Short name

Valganciclovir Level

Frequently asked questions

How often should I get this test?
Your doctor will determine the frequency based on your treatment plan, how long you’ve been taking valganciclovir, and your overall health. Follow their instructions closely.
Can I eat or drink before this test?
You can eat and drink normally before the test, as it doesn’t require fasting.
What if my results are outside the expected range?
If your results are abnormal, your doctor will review them with you and may change your medication dose or treatment plan to keep you safe and effective.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 17, 2026. · Read our editorial policy