Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency
What is Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency?
Glucose-6-phosphate dehydrogenase deficiency, or G6PD deficiency, is a genetic condition that affects red blood cells. People with this condition lack enough of an enzyme called G6PD. This enzyme protects red blood cells from damage caused by oxidative stress.
When someone with G6PD deficiency is exposed to certain triggers, their red blood cells break down too quickly. This process is called hemolysis. It can lead to hemolytic anemia, which means the body does not have enough healthy red blood cells to carry oxygen effectively.
Many people with G6PD deficiency live normal lives without symptoms. Problems usually happen only when they encounter specific triggers like certain medications, foods, or infections. Understanding your triggers and monitoring your blood health can help you avoid hemolytic crises.
Symptoms
- Sudden fatigue or weakness
- Pale or yellowish skin, also called jaundice
- Dark urine, often tea-colored or brown
- Rapid heart rate
- Shortness of breath
- Abdominal or back pain
- Fever during hemolytic episodes
- Enlarged spleen
Many people with G6PD deficiency have no symptoms between hemolytic episodes. Some people never experience a crisis if they avoid their specific triggers. Symptoms appear suddenly when red blood cells break down rapidly during a hemolytic crisis.
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Causes and risk factors
G6PD deficiency is an inherited genetic condition passed down through families. The gene for G6PD is located on the X chromosome. Males are more likely to have symptoms because they have only one X chromosome. Females can be carriers and may have mild symptoms or remain unaffected.
Hemolytic crises are triggered by oxidative stress from several sources. Common triggers include fava beans, certain antibiotics, antimalarial drugs, and pain relievers like aspirin. Infections, particularly bacterial and viral illnesses, can also trigger episodes. Other triggers include naphthalene in mothballs, henna, and some herbal supplements. Avoiding known triggers is the main way to prevent hemolytic crises.
How it's diagnosed
G6PD deficiency is diagnosed through specialized enzyme testing that measures G6PD levels in red blood cells. Blood tests during a hemolytic crisis can reveal important clues about the condition. Elevated bilirubin levels indicate red blood cell breakdown. Increased red cell distribution width, or RDW, shows a mix of damaged cells and new cells released to replace them. Dark urine with elevated urobilinogen confirms active hemolysis.
Rite Aid offers blood testing that can help monitor hemolytic activity through biomarkers like bilirubin, RDW, and urine urobilinogen. Regular monitoring helps you understand how your body responds to triggers and track your blood health between episodes. Early detection of hemolytic markers can help you seek medical care quickly during a crisis.
Treatment options
- Avoid known triggers including fava beans, certain medications, and specific chemicals
- Treat underlying infections promptly to prevent hemolytic episodes
- Stay hydrated, especially during illness
- Maintain a balanced diet rich in antioxidants from fruits and vegetables
- Inform all healthcare providers about your G6PD deficiency before taking new medications
- Seek immediate medical care during hemolytic crises for supportive treatment
- Blood transfusions may be needed during severe hemolytic episodes
- Folic acid supplementation to support red blood cell production
- Regular monitoring of blood counts and liver function
Concerned about Glucose-6-Phosphate Dehydrogenase (G6PD) Deficiency? Get tested at Rite Aid.
- Simple blood draw at your nearest lab
- Results in days, not weeks
- Share results with your doctor
Frequently asked questions
Fava beans are the most important food to avoid with G6PD deficiency. Some people also react to legumes like soybeans and lentils. Menthol and certain herbal teas containing high levels of antioxidants may trigger reactions in sensitive individuals. Keep a food diary to track any symptoms after eating new foods.
G6PD deficiency cannot be cured because it is a genetic condition. However, most people manage it successfully by avoiding triggers. Between hemolytic episodes, people with G6PD deficiency are typically healthy. The focus is on prevention and knowing when to seek medical care during a crisis.
G6PD deficiency follows an X-linked inheritance pattern. Males who inherit the affected gene will have the condition. Females need two copies of the affected gene to have severe symptoms, though carriers can have mild symptoms. Parents can pass the gene to their children without knowing they carry it.
Common medications to avoid include sulfa antibiotics, certain antimalarials like primaquine, and aspirin in high doses. Nitrofurantoin, dapsone, and some cancer drugs can trigger hemolysis. Always tell your doctor and pharmacist about your G6PD deficiency before starting any new medication, including over-the-counter products.
Signs of a hemolytic crisis include sudden fatigue, dark urine, yellowing skin or eyes, and rapid heartbeat. You may also experience back or abdominal pain. These symptoms typically appear within hours to days after exposure to a trigger. Seek medical attention immediately if you notice these warning signs.
Yes, infections are common triggers for hemolytic episodes in people with G6PD deficiency. Both bacterial and viral infections create oxidative stress that damages red blood cells. Treating infections early and monitoring your blood markers can help prevent severe hemolytic crises. Stay current with vaccinations to reduce infection risk.
Testing frequency depends on your symptoms and exposure history. Regular monitoring of bilirubin, RDW, and urobilinogen helps track hemolytic activity. Many people benefit from testing twice per year to establish baseline values. More frequent testing is important after suspected trigger exposure or during illness.
G6PD deficiency is most common in people of African, Mediterranean, Middle Eastern, and Southeast Asian descent. It affects about 400 million people worldwide. The gene may have provided protection against malaria in certain regions. Knowing your family history helps identify your risk.
Women with G6PD deficiency can have safe pregnancies with proper monitoring. Some women experience mild hemolysis during pregnancy due to increased metabolic demands. Avoiding triggers remains important during pregnancy and breastfeeding. Genetic counseling can help families understand inheritance risks for their children.
Focus on avoiding known triggers and maintaining overall health. Read medication labels carefully and inform all healthcare providers about your condition. Eat a nutritious diet while avoiding fava beans and other trigger foods. Regular blood testing helps you stay aware of your blood health and catch problems early.