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Doctor insights on: Levothyroxine And Bright Yellow Urine

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Why does Synthroid (thyroxine) turn my urine bright yellow? Is this normal? I do drink a lot of water.

Why does Synthroid (thyroxine) turn my urine bright yellow? Is this normal? I do drink a lot of water.

No: Synthroid (thyroxine) unless containing some artificial yellow color, should not do what you describe. Bright yellow color doesn't necessarily mean abnormal, either. ...Read more

Urine (Definition)

Urine is the product of the kidneys, which is produced to eliminate the waste products of metabolism, manage body fluid balance, &maintain acid-base balance. The blood is first filtered by the kidneys, and the composition of the resulting fluid is then altered depending on the body's needs. It is composed of mostly water, and breakdown products from blood cells impart ...Read more


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Could high calcium in the blood and intake of levothyroxine for hypothyroid be cause of strong foul odor in urine? I drink ~3 6oz cups of water a day

Could high calcium in the blood and intake of levothyroxine for hypothyroid be cause of strong foul odor in urine? I drink ~3 6oz cups of water a day

Unlikely: Neither high calcium nor levo. Will cause foul odor. Most common cause of dark, strong urine is dehydration. You should be drinking minimum of 100 ounces of fluids/day or enough to keep urine color fairly clear, not only to help lower calcium but to prevent kidney stones. Other causes of foul urine are UTI and certain foods and meds. A urinalysis and culture can determine if UTI present. ...Read more

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Urine is brite day-glo yellow, worse in am. Odd, taking no supplements taking tamoxifen, ativan (lorazepam) & levothyroxine. Severe fatigue & muscle weakness?

Urine is brite day-glo yellow, worse in am. Odd, taking no supplements taking tamoxifen, ativan (lorazepam) & levothyroxine. Severe fatigue & muscle weakness?

Discuss with MD: Sounds like the effects of vitamins, some energy drinks can have this effect as well. If no dietary source may just be concentrated urine. However, if any symptoms, such as burning when voiding, new sense of urgency when having to void, or change in frequency of voiding, you may need to be seen sooner. Of note; some medications can cause change in the urine color as well. ...Read more

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Why is my urine bright yellow all of a sudden?

Why is my urine bright yellow all of a sudden?

Color = content: Usually it's just concentrated but can be from foods (vit c). ...Read more

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I am taking amoxicillin. My urine is bright yellow. Is it from medication?

I am taking amoxicillin. My urine is bright yellow. Is it from medication?

Urine: I have never heard of amoxicillin causing this side effect. Generally, bright yellow urine is indicative of concentration secondary to a lack of water. Be sure to keep yourself hydrated. ...Read more

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Why is my urine bright yellow?

Why is my urine bright yellow?

Vitamins: Usually, urine is a clear, sparkling, lemon color. Daily multi-vitamins could cause your urine to have more of a fluorescent yellow color. With liver disease, your urine would be more of a dark color. With heart disease, you may have a lighter color to the urine. A trial off otc meds may clear up your urine - if it doesn't, then you may consider getting a urinalysis to guide you. ...Read more

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What medicines cause urine tobe bright yellow?

What medicines cause urine tobe bright yellow?

Various: Concentrated urine can be yellow, also some dyes in vitamins and other pills can turn the urine yellow. ...Read more

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What does it mean when urine appears very bright, almost neon yellow?

What does it mean when urine appears very bright, almost neon yellow?

Not much: The urine color typically reflects its concentration and contents. As long as there are no other symptoms, it isn't a big deal. The more concentrated the urine...The more yellow (typically). This is why urine is almost clear after hitting the bottle too hard as it really dilutes the urine. ...Read more

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What would cause my urine to be bright yellow, and smell really salty?

What would cause my urine to be bright yellow, and smell really salty?

Probably several: But, one easy thing to try is to drink lots of water (8+ 8oz glasses per day) for a day or two. If this clears it - you might not have a problem other than being dehydrated. But, if it is still not right - see your doctor for an exam and lab work. Being pregnant makes it even more important to be checked and your body may be a sensitive one too. If water isn't enough, see the doctor. Best wishes! ...Read more

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I have been really nauseous for 3 days along with bright yellow urine. What could that mean?

I have been really nauseous for 3 days along with bright yellow urine. What could that mean?

Dehydration?: See your doctor to find out the cause of your nausea and get treated for it. When the nausea goes away you take more fluid in and color improves. ...Read more

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I have been having bright yellow (almost green) urine. What could this mean? How can I fix it?

I have been having bright yellow (almost green) urine. What could this mean? How can I fix it?

Urine: Bright yellow urine is not necessarily abnormal and can be seen after taking some B vitamins or not drinking enough fluids. If you have further concerns have your physician order a urinalysis. ...Read more

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Does supplemental fiber cause bright yellow urine?

Does supplemental fiber cause bright yellow urine?

Not necessarily: The fiber itself wouldn't but if the product you are using has dyes added into it those might. ...Read more

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Why is my urine bright yellow after taking vitamins?

Why is my urine bright yellow after taking vitamins?

YOUR BODY: Eliminates in the urine and through stools the vitamins it can not store. Your urine will have most of those. Very normal to have darker urine. ...Read more

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My urine is bright yellow but I don't take vitamins, cause?

My urine is bright yellow but I don't take vitamins, cause?

Normal variation: The color of one's urine is a reflection of one's state of hydration and how one's body uses water. The more hydrated one is, the clearer the color and the greater the urinary frequency. On the other hand, darker yellow urine is associated with dehydration and less urinary frequency. Vitamin b2 (riboflavin), present in most multivitamins, is what imparts a more colorful yellow/orange urine. ...Read more

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Why is your urine bright yellow after you take a multi vitamin?

Why is your urine bright yellow after you take a multi vitamin?

From Coloring dyes: Most multivitamin have coloring agent added to them ie yellow number 5 or something similar and this non toxic coloring agent is removed unchanged by the kidneys. Urine color can be yellow, green, orange etc depending on the coloring agent added to the multivitamin tablets. ...Read more

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Does taking a B-complex vitamin and having bright yellow urine mean you are taking enough?

Does taking a B-complex vitamin and having bright yellow urine mean you are taking enough?

Enough B1 and B2: Vitamins B1 and esp. B2 have a yellow color so bright yellow urine suggests enough B1 and B2. But B3, 5, 6, 12 and folate aren't yellow and you might still have inadequate levels of those. Many have difficulty absorbing B12. Nearly half of people have trouble metabolizing folic acid and need the L-5-MTHF form of folate. Fasting blood homocysteine can indicate if you have enough B6, B12 and folate. ...Read more

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I have been taking mega men vitamins and noticed my urine has been bright yellow. Is that the excess vitamins that the body doesn't use?

I have been taking mega men vitamins and noticed my urine has been bright yellow. Is that the excess vitamins that the body doesn't use?

Yes.: Multivitamins can impart a bright yellow color to the urine, usually attributed to the b-complex vitamins. Other compounds in the formulation also contribute to urine color, and is harmless. Patients who use their urine color as a measure of hydration status should be careful not to drink fluids excessively because of this. ...Read more

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Bright yellow urine, grey stool and feeling nauseous?

Bright yellow urine, grey stool and feeling nauseous?

Jaundiced?: Your symptoms, when considered together, suggest early onset jaundice due to a liver problem, bile duct/gallbladder problem, or pancreatic disease. This can be serious, may worsen, & deserves urgent physical examination & lab testing. Please see a doctor or present yourself to the emergency room. ...Read more

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Why does my urine look like a bright yellow color?

Why does my urine look like a bright yellow color?

B vitamins usually: The b's give a bright, almost fluorescent or iridescent yellow color to urine as they are excreted ( (a reminder that they are water soluble, so mega doses must wash through you)). ...Read more

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In May 2015 vita D was 22. I take 2k daily during winter but decided to double dosage every other day. Just noticed now urine bright yellow. Stop it?

In May 2015 vita D was 22. I take 2k daily during winter but decided to double dosage every other day. Just noticed now urine bright yellow. Stop it?

Vitamin D deficiency: 1, 000 international units (IU) of Vitamin D will typically raise 25OH D level by 10ng/mL (30-100ng/mL is considered normal reference range). Vitamin D supplementation does not affect urine color. But vitamin B supplements can turn urine bright yellow. ...Read more

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I have severe back pain bright yellow urine yellow w discharge?

I have severe back pain bright yellow urine yellow w discharge?

Discharge: Discharge is not normal ever and back pain and discharge could be kidney related. See your doctor immediately hold off on Ibuprofen as that is broken down in your kidneys which may be compromised. ...Read more

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Does urine always change to bright yellow with prenatal vitamins? It was and not it isn't as bright though I'm still taking them.

Does urine always change to bright yellow with prenatal vitamins? It was and not it isn't as bright though I'm still taking them.

Prenatals: The shades of yellow can vary depending on the other components of your urine. no worries whether the coolor is there or not, continue taking your vitamins. :) ...Read more

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I believe I have a uti. I have very yellow and urine is very bright yellow should I see a doctor?

Urine color only?: Urine color can change as a result of ingestion of foods, vitamins, medications, and certain illnesses. Urinary tract infections are usually associated with painful or frequent urination, strong foul smelling urine, difficulty initiating a urine stream and occasionally with fever, back or abdominal pain and vomiting. Infections are diagnosed at a physicians office with a urine sample. ...Read more

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The morning after I had sex with a condom, my urine was a bright yellow color, was smelling very strong and weird and was cloudy. What is wrong?

The morning after I had sex with a condom, my urine was a bright yellow color, was smelling very strong and weird and was cloudy. What is wrong?

Maybe nothing wrong: The appearance of urine (color, cloudiness), depth of color, and odor all depend on food and fluid intake. Having sex has no effect at all. This isn't an STD or anything else related to recent sex. However, if the odor and cloudiness actually are from vaginal fluids, you might have bacterial vaginosis, a kind of bacterial overgrowth. If you have vaginal discharge or odor, best to see a doctor. ...Read more

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When you have a kidney stone, is your urine usually bright lemon yellow?

When you have a kidney stone, is your urine usually bright lemon yellow?

No: A tinge of blood, perhaps. Weird-colored urine most often reflects something in the diet or especially medications -- some makers of overpriced vitamins spike them with stuff that changes the urine color so people will believe they're magic. I wouldn't wish a kidney stone on anyone and hope you'll get diagnosed / treated as required with a good result. ...Read more

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Is my urine supposed to be bright yellow after taking vitamin b complex?

Is my urine supposed to be bright yellow after taking vitamin b complex?

It depends: Urine normally is yellow/amber, turns dark yellow while we take vitamins but it all depends due to combination of other foods ingested along with water which dilutes the urine. ...Read more

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My period is 4 days late, I'm having period cramps and my urine is bright yellow. Any advice?

My period is 4 days late, I'm having period cramps and my urine is bright yellow. Any advice?

If unprotected: And having sexual intercourse, I suggest a home pregnancy test. If cramping and/or heavy bleeding I suggest using Aleve, (naproxen) if not allergic to NDSAIDS until you can be seen by your GYN. ...Read more

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Why is the urine of patients with diabetes mellitus bright (almost neon) yellow? Also, what causes the pH spike with diabetes insipidus?

Why is the urine of patients with diabetes mellitus bright (almost neon) yellow? Also, what causes the pH spike with diabetes insipidus?

Dehydration, fillers: Bright urine most often comes from dehydration (too little fluid or excess loss of fluids), often seen in diabetes. It can also come from the fillers and buffers in pills, including vitamins. PH spiking is alkalosis or excessively alkaline state from abnormal fluid and electrolyte dynamics. See your PCP or Endocrinologist for electrolyte lab work, and more info and discussion. ...Read more

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Do vitamins b, c and magnesium cause yellowish brown stool and bright yellow urine?

Do vitamins b, c and magnesium cause yellowish brown stool and bright yellow urine?

B-Vitamins: B vitamins can cause bright yellow urine, check with your doctor if you are concerned. Not familiar with these vitamins and magnesium causiing yellowish stool. Best wishes. ...Read more

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Bright yellow urine very bright like neon on toilet paper an abit uncomfortable pain in vagina especially when having intercourse is this worrysome?

Bright yellow urine very bright like neon on toilet paper an abit uncomfortable pain in vagina especially when having intercourse is this worrysome?

Bright yellow urine: Is usually a reflection of what you are ingesting. Review supplements and other things in your diet and through a process of elimination, see if you can figure it out. If you cannot, plan to see a local physician who can evaluate your urine more precisely.
As for vaginal pain after intercourse, see your gynecologist if this is a persisting problem. ...Read more

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My urine is bright neon yellow (not goldish at all), but I'm not taking any vitamins or medications other than birth control. What could be the cause?

My urine is bright neon yellow (not goldish at all), but I'm not taking any vitamins or medications other than birth control. What could be the cause?

Urine Color: The color of your urine can be changed by dyes in foods, medications, drinks, disease and by ingesting dyes. If you changed the brand of BCP or the generic version it could cause this. The urinary tract medicine pyridium (phenazopyridine) is a common cause as well. Liver disease can cause this as well. If you have any yellowing of the whites of your eyes or this does not resolve seek medical care ...Read more

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I am a 66 yr old male. Yellow urine. Now in the morning there is a bright red spot on my underwear (urinary track) what? Only has happened in the last two nights. I am in good health, tennis, golf etc.

I am a 66 yr old male. Yellow urine. Now in the morning there is a bright red spot on my underwear (urinary track) what? Only has happened in the last two nights. I am in good health, tennis, golf etc.

Here are some. ..: What you described represents the occurrence of urethral spotting, usually resulting from some minor bleeding from urethra including the prostate urethra. But, it's mandatory for a 66-yr man to be evaluated by following the instruction in http://formefirst. Com/eNewsletter06.html. Besides, it's useful to peruse the articles inhttp://formefirst. Com/eNewsletter. Html. ...Read more

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I'm 28 and had low grade fever and bright yellow urine. I don't take vitamins. Urine glucose is 100 blood glucose 110. Not fasting or diabetic?

I'm 28 and had low grade fever and bright yellow urine. I don't take vitamins. Urine glucose is 100 blood glucose 110. Not fasting or diabetic?

Check it more: Glucose in the urine indicates the blood sugar (bs) is high enough to overwhelm the ability of the kidneys to recover all of the glucose from filtered blood, as the filtrate travels the path toward becoming urine. People vary greatly in their ability to recover this filtered glucose. Some even have glucose in the urine when blood sugar is totally normal. Get more bs readings to be sure no diabetes. ...Read more

Dr. David Sneid
1,422 Doctors shared insights

Thyroxine (Definition)

Thyroxine is a thyroid agent. ...Read more


Levothyroxine (Definition)

Of the hormone produced by one's own ...Read more