​Urine That Appears Blue or Green In Color

If you find that your urine has turned blue or green, it is most likely that the cause is a urinary tract infection (UTI) or a medication you've been taking. There are, however, some diseases and conditions that cause this problem.

There are many, many medications- both over-the-counter and prescription- that can turn your pee blue or green. Below is a list of some of them, but don't forget that there are more than just these. Ask your doctor or pharmacist about whether any new medication you've taken could have green or blue urine as a side effect.
Blue or Green Urine
Medications that Cause Blue or Green Urine

Amitriptyline- an anti-depressant and migraine preventative

Cimetidine (Tagamet)- a common antacid medication that is also used to treat stomach ulcers

Indomethacin (Indocin)- a medication used to treat gout
Propofol (Diprivan)- a drug used as a general anesthetic or a sedative administered by IV

Methylene Blue- an ingredient in food dyes and medications with a wide variety of uses. It is usually part of the food colors Azure A, B and C. It is an MAOI and so should be used carefully, especially by those taking SSRI medications. Methylene blue is an ingredient in Prosed, another medication on this list, and is the reason Prosed can cause blue or green urine.

Metoclopramide- an anti-nausea drug that also increases gastric motility

Promethazine (Phenergan)- an anti-histamine medication that is also used to treat nausea and insomnia

Prosed, Urised and Trac Tabs- anti-spasmodic medications used for urinary tract pain

Triamterene- a diuretic used to treat high blood pressure and edema (swelling)
​
Viagra- a drug used to treat erectile dysfunction
General Categories of Medications:

Medications used to treat urinary pain- These can turn your pee unusual colors, depending on which brand you get. It is not unusual for this sort of medication to turn your urine blue or green.
​
Medications with Methylene Blue as an ingredient- This compound is used for many different purposes. In combination with light, it is used to treat a wide variety of conditions, such as psoriasis, West Nile virus and Hepatitis C, due to its anti-viral properties. It is being investigated for use against cancer and dementia.