G6PD Test
A blood test for G6PD deficiency, an inherited condition where some medicines and foods can break down red blood cells.
Quick Summary
Before medicines such as primaquine, and in newborns with jaundice.
G6PD enzyme activity.
No preparation; avoid testing right after a haemolysis episode if possible.
Overview
G6PD deficiency is common in some Indian communities.
People with it should avoid certain medicines and fava beans.
What It Measures
G6PD activity
Enzyme level.
How It's Performed
- 01
Preparation
Usually no special preparation. Tell the staff about medicines you take.
- 02
Blood sample
A small amount of blood is taken from a vein in your arm with a thin needle.
- 03
Afterwards
Press on the spot for a minute. A small bruise is common; you can go back to normal activities.
Interpreting Results & Next Steps
Discuss with Doctor
Your doctor will give a list of medicines to avoid. Normal ranges differ between laboratories, ages and sexes; always use the range printed on your report and ask your doctor what your results mean.
If values are Low:
Low activity means G6PD deficiency.
Sources and further reading
Last updated 21 October 2026. For more detail, see these trusted health organisations.
- G6PD Test(opens in a new tab) · MedlinePlus, US National Library of Medicine