Porphobilinogen Quantitative Test: Booking, Price, and Results
About Porphobilinogen Quantitative Test: Booking, Price, and Results
| Field | Value |
|---|---|
| Also Known As | PBG urine test, Urine PBG, Porphobilinogen (PBG) Quantitative Urine, Porphobilinogen test |
| Sample Type | 24-hour urine collection |
| Fasting Required | No fasting required |
| Report Time | 2 days |
| Recommended For | Adults of all genders, particularly those with symptoms suggesting acute porphyria |
| Price | Starting at ₹2,600 |
What is a Porphobilinogen Quantitative Test?
The Porphobilinogen Quantitative test measures the amount of porphobilinogen (PBG) excreted through urine over 24 hours. PBG is a chemical produced naturally during the formation of haem, the substance in red blood cells that carries oxygen. Doctors order this test when a patient shows symptoms that may point to acute porphyria, a group of inherited disorders affecting haem production. It is also known as the PBG urine test or Urine PBG test.
What Does a Porphobilinogen Quantitative Test Measure?
This test analyses a specific compound in the urine to assess how the body is producing haem. The table below summarises the key parameter measured:
| Parameter | What It Tells Us |
|---|---|
| Porphobilinogen (PBG), 24-hour urine | The total amount of PBG passed in urine over 24 hours; raised levels point to possible acute porphyria or other conditions affecting haem production |
In some settings, a random urine sample may also be used, and results are then adjusted against creatinine (a waste product) to account for differences in urine concentration.
Why is a Porphobilinogen Quantitative Test Done?
This test is ordered when a doctor suspects a disorder of haem metabolism. It helps confirm or rule out conditions that cause abnormal PBG levels.
Common Symptoms That May Require This Test
The following symptoms are among the most common reasons a doctor may request this test:
- Severe unexplained abdominal pain
- Dark, reddish-brown, or port-wine coloured urine
- Nausea and vomiting with no clear cause
- Muscle weakness or numbness in the limbs
- Confusion, anxiety, or mood changes
- Rapid heart rate (tachycardia)
- Seizures or neurological disturbances
Conditions This Test Can Help Detect
The Porphobilinogen Quantitative test can assist in identifying several conditions:
- Acute intermittent porphyria (AIP), hereditary coproporphyria (HCP), and variegate porphyria (VP), which are inherited disorders of haem production
- Hepatitis (liver inflammation)
- Lead poisoning and other heavy metal toxicity
- Liver cancer
- Porphyrias, triggered by exposure to certain drugs, halogenated solvents, or heavy metals
Porphobilinogen Quantitative Test for Chronic Disease Monitoring
Once acute porphyria has been confirmed, this test may be used periodically to monitor disease activity. Doctors may check PBG levels to assess treatment response, such as after haem therapy, or to track changes between and during attacks. The frequency of monitoring is decided by the treating specialist based on the patient's clinical progress.
How to Prepare and What to Expect
Preparing correctly for this test is important, as certain factors can affect the accuracy of results.
Do You Need to Fast?
No fasting is required for this test. There are no restrictions on water or food intake. However, alcohol should be avoided for at least 24 hours before you begin collecting the urine sample.
Practical Tips Before Your Test
The following steps will help ensure your sample gives accurate results:
- Bring a detailed clinical history, including your symptoms, previous test results, and any family history of porphyria, as this is required for the test.
- Inform your doctor about all medications, vitamins, and supplements you are taking, as many drugs can affect PBG levels.
- Avoid alcohol for at least 24 hours before starting the collection.
- Try to collect the sample during an acute episode (when symptoms are present), as PBG levels can be normal between attacks.
- Use the dark-coloured container provided by the laboratory to protect the sample from light.
- Keep the container refrigerated throughout the collection period.
Step-by-Step Procedure
The following steps describe how the 24-hour urine collection is carried out:
- On the morning of the first day, discard your first urine of the day and note the time.
- From that point, collect all urine passed over the next 24 hours, including the first morning void on the second day.
- Keep the collection container in a refrigerator and away from direct light throughout the entire collection period.
- Once complete, seal and label the container as instructed by the laboratory.
- Deliver the sample promptly to the Lupin Diagnostics centre or hand it to the home collection phlebotomist; keep it refrigerated until handover.
- The laboratory will process a 5 mL aliquot (a measured portion) of your collected sample using column chromatography.
Factors That Can Affect Accuracy
Several factors can interfere with test results and should be avoided or disclosed:
- Exposing the sample to light, which causes PBG to break down
- Alcohol consumption within 24 hours of collection
- Certain medications, including barbiturates, sulfa drugs, and hormonal preparations
- Collecting the sample when you are symptom-free, as PBG may be normal between attacks
- An incomplete 24-hour collection (missing some urine voids)
- High temperatures or very acidic urine (pH below 5.0), both of which can degrade PBG
Understanding Your Porphobilinogen Quantitative Test Results
Results from this test should always be reviewed by a doctor alongside your symptoms, medical history, and other investigations. The table below shows general reference ranges for the 24-hour urine collection:
| Parameter | Normal Range |
|---|---|
| PBG, 24-hour urine | Less than 4 mg per 24 hours (less than 18 micromoles per 24 hours) |
A level more than twice the upper reference limit is generally considered consistent with acute porphyria. A result within the normal range during a symptom-free period does not completely exclude the diagnosis.
Disclaimer: These ranges are general guidelines. Your doctor will interpret your results based on your age, health history, and other factors. Always consult a qualified healthcare professional for personalised medical advice.
Results During Special Conditions
Certain situations can influence PBG levels and how results are interpreted.
- Acute porphyria attacks can be triggered by medications, infections, hormonal changes, stress, alcohol, and a low-calorie diet, all of which may raise PBG levels.
- A mildly elevated but declining level may indicate a resolving or treated attack rather than an ongoing one.
- PBG levels can be entirely normal when a patient is between episodes, so a normal result during a symptom-free period should be interpreted with caution by your doctor.
How to Maintain Healthy Levels
These general wellness tips may help reduce the risk of triggering porphyria-related symptoms.
- Avoid known triggers such as alcohol, smoking, prolonged fasting, and certain medicines; always check with your doctor before starting any new medication.
- Maintain a balanced diet with adequate carbohydrates, as very low-calorie diets may trigger attacks in people who are susceptible.
- Speak with a haematologist or medical geneticist if you have a family history of porphyria, for appropriate guidance and monitoring.
Lupin Diagnostics Porphobilinogen Quantitative Test Price and Home Collection
The Porphobilinogen Quantitative test is available at Lupin Diagnostics starting at ₹2,600, with home collection offered across multiple cities. The pricing below is indicative and may vary by location.
| City | Approximate Price (₹) |
|---|---|
| BHOPAL | 2600 |
| CHENNAI | 2600 |
| HYDERABAD | 2600 |
| KOLKATA | 2600 |
| NAVI MUMBAI | 2600 |
| PUNE | 2600 |
Disclaimer: Prices are indicative and may vary by location. Please confirm the current price at the time of booking.
How to Book
The following steps explain how to book your Porphobilinogen Quantitative test online:
- Select the test on the Lupin Diagnostics website.
- Choose your city and preferred time slot.
- Opt for home sample collection by a certified phlebotomist, or visit your nearest Lupin Diagnostics centre.
- Receive your report via email or WhatsApp within the stipulated turnaround time.
Home Collection
The Porphobilinogen Quantitative test home collection service is available across cities through Lupin Diagnostics. A trained phlebotomist will visit your home at a scheduled time and guide you through the 24-hour urine collection process. All samples are processed in NABL-accredited laboratories, and your digital report is delivered directly to you.
Frequently Asked Questions
This test measures porphobilinogen, a chemical produced during haem synthesis, in a 24-hour urine sample. It is primarily used to evaluate whether a patient has acute porphyria when symptoms such as severe abdominal pain, dark urine, or neurological changes are present. It may also help detect conditions such as lead poisoning or liver disease.
No fasting is needed. You can eat and drink normally before and during the collection period. The key restrictions are to avoid alcohol for at least 24 hours before starting the collection and to inform your doctor about all medications you are taking.
It is best to collect the sample when you are actively experiencing symptoms, such as abdominal pain or dark urine. PBG levels can return to normal between episodes, which means a sample collected during a symptom-free period may not reflect the true picture.
PBG and related compounds break down when exposed to light, which can lead to falsely low results. The laboratory will provide a dark-coloured container for this reason. Keeping the container refrigerated throughout the collection period also helps preserve the sample's integrity.
Yes. Several medicines, including barbiturates, sulfa drugs, hormonal preparations, and certain anticonvulsants, can either trigger an acute porphyria episode or interfere with test accuracy. Always share a complete list of your medications with your doctor before the test.
Not always. A normal result during a period when symptoms are absent does not rule out porphyria entirely. If your doctor still suspects the condition based on your history and symptoms, repeat testing during an acute episode or additional tests such as genetic studies may be recommended.
Porphobilinogen Quantitative Test: Booking, Price, and Results
