Orange Urine: Causes, Medications, and When It Signals Liver Issues
Updated April 2026
See a doctor if no food or medication explanation
Orange urine is most often rifampin or phenazopyridine (both expected). If you are not on those medications and have not eaten large amounts of carrots or beta-carotene, and the orange persists beyond 24 hours, see your GP - especially if combined with yellow eyes or skin.
What Orange Urine Usually Means
Orange urine has a distinct set of likely causes, and the first question to ask yourself is: are you taking rifampin or phenazopyridine? These two medications account for the large majority of orange urine cases seen in clinical practice.
Rifampin (rifampicin in the UK) is an antibiotic used to treat tuberculosis, leprosy, and certain other serious bacterial infections. One of its well-documented and expected side effects is turning urine, tears, sweat, and other body fluids orange or red-orange. Patients starting rifampin should be told to expect this - and typically are - but it still surprises people. The colour is harmless and clears after completing the course.
Phenazopyridine (Pyridium in the US, sold over the counter as AZO) is a urinary analgesic used to relieve the burning and urgency of UTIs while awaiting antibiotic treatment. It reliably produces bright orange urine. This is the drug itself being excreted - not a sign of worsening infection.
If you are not on either medication, the next most likely cause is dietary: large amounts of carrots, carrot juice, or beta-carotene supplements. Beyond that, severe dehydration can produce an amber-orange colour. And if none of these apply, liver or bile duct disease - which causes bilirubin to accumulate and spill into urine - becomes a more serious possibility to consider. As the Mayo Clinic notes, orange urine combined with jaundice (yellow eyes or skin) warrants prompt evaluation.
Common Causes Ranked by Likelihood
1. Rifampin / rifampicin
Anti-tuberculosis antibiotic. Produces orange-red urine, sometimes intensely so. Expected and documented side effect. Clears after completing treatment. Also colours sweat, saliva, and tears orange - can stain soft contact lenses permanently.
2. Phenazopyridine (Pyridium, AZO)
UTI pain relief. Bright orange urine is expected and harmless. Clears 1-2 days after stopping. Note: can interfere with dipstick urine test results (false positives/negatives).
3. Beta-carotene (carrots, supplements)
Very large amounts of carrots or beta-carotene supplements can produce a mild orange tint. More commonly associated with skin yellowing (carotenodermia) than pronounced urine colour change.
4. Severe dehydration
Very concentrated urine can have an amber-to-orange hue. Correct with rehydration and reassess.
5. Liver or bile duct conditions
Bilirubin overflow from hepatitis, biliary obstruction, or haemolysis. Usually accompanied by yellow eyes/skin, pale stools, fatigue, nausea. Seek care promptly if these accompany orange urine.
The Liver Question: When Orange Signals Something Serious
The scenario that moves orange urine into serious territory is when it accompanies jaundice - the yellowing of eyes and skin caused by bilirubin accumulation. Bilirubin is a bile pigment produced when red blood cells are broken down. Normally, it is processed by the liver and excreted through bile into the digestive tract. When the liver is damaged (hepatitis, cirrhosis), when bile flow is obstructed (gallstones, cancer of the bile duct or pancreas head), or when red blood cells are being destroyed too rapidly (haemolytic anaemia), bilirubin spills into the blood and is excreted through the kidneys, producing dark or orange-tinged urine.
The classic triad of obstructive jaundice is dark orange or tea-coloured urine, pale (clay-coloured) stools, and yellow eyes. If you notice any of these alongside orange urine, seek same-day care. Do not wait to see if it resolves.
See the dedicated liver signs page for a full explanation of how liver conditions affect urine colour.
What to Do Next: Decision Tree
Started rifampin or phenazopyridine in the last 48 hours
This is expected. No action needed. Orange will clear after completing the course.
Ate large amounts of carrots, carrot juice, or beta-carotene supplements
Likely dietary. Monitor over 24-48 hours. Reduce intake. If it does not clear, see GP.
Very dark and you have not drunk much today
Likely concentrated dehydration-orange. Drink water and recheck.
Orange with yellow eyes or skin (jaundice)
Seek same-day care. Possible liver or bile duct issue.
Orange with no medication, food, or dehydration explanation, persisting 24+ hours
Book GP. Unexplained orange urine needs assessment.
When to Seek Care
Today: Orange plus yellow eyes/skin; orange plus severe right-side pain or fever; orange plus dark stools.
Book this week: Orange with no medication or food explanation persisting more than 24-48 hours.
Monitor: On rifampin or phenazopyridine - this is expected, no action needed.
Frequently Asked Questions
Is orange urine a sign of a liver problem?
Orange urine can indicate a liver or bile duct problem if it occurs alongside yellow eyes or skin (jaundice), pale stools, or dark stools. However, the most common causes are medications (rifampin, phenazopyridine) and foods (carrots). If you have none of those and the orange persists beyond 24 hours, a GP visit is warranted.
Why is my pee orange after taking phenazopyridine?
Phenazopyridine (Pyridium, AZO) is a urinary analgesic used for UTI pain. It produces bright orange urine as an expected harmless side effect - the drug itself is being excreted through the kidneys. It clears within 1-2 days of stopping. It can also interfere with dipstick urine test results, so let your doctor know if you have taken it before a urine test.
Does orange urine mean I am dehydrated?
Severe dehydration can produce an amber-to-orange urine. If your orange urine lightens to pale straw after drinking 2-3 glasses of water, dehydration was the likely cause. If it stays orange despite rehydration, and you are not on the medications listed above, see your GP.
Can vitamin C cause orange urine?
Very high doses of vitamin C (ascorbic acid) - typically 2000mg or more per day - can produce a mild orange tint in some people. Standard supplement doses (500-1000mg) typically do not produce a noticeable colour change.
Sources: Mayo Clinic; Cleveland Clinic.