Hypothyroidism :: Thyroxine Can Give False Fasting Blood Test ?
Jan 13, 2015
I am on 150mcg Thyroxine and have a fasting blood test on Friday. I take thyroxine at night as it makes me feel better the next day - like my thyroid is already working/functioning as it should be. Lots of speculation about whether to take meds before a test - fasting or not and if it could give a false reading. Wish doctors could be consistent with their thyroid diagnosis, and have not published their findings on whether or not to take meds before a blood test.
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I received a letter from a GP at my surgery requesting that I have a fasting blood test, glucose I assume. I am currently on 5 mg pred after just over 2 years. Is this necessary or useful do you think? I'm one of the 'lucky' ones who lose weight on pred and my BMI is extremely low. I have little appetite and eat 6 times a day to try to maintain where I am now! I have struggled to get down to 5 and am not sure my adrenals are doing very well. Very fatigued and not too comfortable at the moment.
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My Doctor gave me a call last week after having my bloods done because of feeling tired and she said my thyroid was borderline and need to go back in 6 weeks.
I've had a call today again from the GP surgery that my glucose blood fasting test was inconclusive and I will need to fast again in 6 weeks and have that done. What does it mean?
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Are there diseases that can sort of "mask" as mono, yet be something else? Can something else other than EBV test you positive?
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I have regular blood tests and have been given Metformin for Type 2 for the past six months. I often feel the need for a nap mid-afternoon but I put that down to the after effects of lunch! I have been morbidly obese for years and considering that, my energy levels are good. I am 65 this month and still work full-time and intend to continue. I also take Tamsulosin for an enlarged Prostate. Recently I was summoned by the doctor after routine blood tests and told I had mild Hypothyroidism for which I was prescribed 50g per day of Thyroxin. They made me feel terrible - every day for two weeks so I've stopped taking them and feel fine again. Seems like the Thyroxin gives me the symptoms of Hypothyroidism - loss of sex drive, tiredness, headaches. What's the likely outcome of not taking these awful pills? Any advice gratefully received.
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So my story goes, between 5-10 years ago I had a few(approximately 4) unprotected sexual encounters. I never gave it a second thought as I was young and invincible plus, I had no reason to doubt the women I was with. Recently I started getting worried that I may have contracted hiv at some point during that time; a highly unlikely and unreasonable fear, but none the less it has been causing me extreme anxiety. Last week I decided to take an oraquick at home test and the results came back negative, easing my mind at that time. I then began to wonder if I preformed the test to the exact specifications (I was worried I may have drank some water in the 30 minute window before testing). So again, I went and bought another test, was sure not to drink for an hour before and again got a negative result.
My mind was at ease until I read that these tests have an 8% chance of false negative; which is strange because its the same test administered in clinics with 99% accuracy. My question: are the causes of false negatives typically due to user error or testing before the window period is up? Do I have anything to worry about?
I am considering taking another test or perhaps going to get a rapid blood test. I know my odds of being positive are extremely low but I keep focusing on the what if. Please help and thank you!
P.s. already in the process of scheduling an appointment to figure out this irrational anxiety.
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does any body have pcos and had have several hpt come positive along with blood test but nothing on the ultrasound please could u reply am rerally confuse at this point because i have never had a pt positive n i did 7 n they were all positive and the blood test was also but both ultrasound showed nothing
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i had my period last june 9 2014, then on june 27 and 28 i had a light spotting.den, i felt something's wrong with me..there's a feeling or slight symptoms of a pregnant woman..a boobs are tender to touch and painful..my body feel hot like i was having a light fever..than july 1 i take a pregnancy test and shows positive but faint line.. then, july 2 to 8 i got again spotting.. and goes away.. july 14 i took another pregnancy test shows again positive faint line.. i went to my ob july 18 just to know her what's happening on me. i had that light spotting again..and in transvaginal ultrasound shows that there was a thickening of the lining tells me that i am positive. 5 to 6 weeks, but i have a cyst considered benign.nothing to worry about she said. she gave me medicine duphaston good for 10 days, and i'm going to come back for a follow up appt. on july 28. again the spotting continues sometimes light bleeding, sometimes full on my liners. another medicine duphaston gud for 5 days she gave me because on the ultrasound she saw only thickening of the linings and the baby wasn't developing. then, this day august 1 i came back for the final appt, i took a blood test and shows negative. transvaginal ultrasound shows again the lining on my ovary.
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I have the symptoms of lyme except for the characteristic bull's eye rash - chronic pain, numbness/tingling, fatigue, bad memory.
The ELISA test came back negative, I am thinking of getting the Western blot test done. Can the Western blot come back with a false negative?
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I just had some labs done and was told that my HS CRP test came back high at 3.0 (should be 1.0 or less). My doc says that has to do with cardiovascular risk and inflammation.
I have also noticed that my blood pressure, which for my whole life has been 90/60, is now between 120/85 - 140/85. Obviously this is very concerning and so sudden.
Have any of you experienced this is relation to hypothyroidism? What is causing this?
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I was recently found to have genital herpes in my vaginal and anal region. There are only two possible people i could have got it from, being my boyfriend and the guy before. My boyfriend has never had an outbreak, but we now know it can be transmitted even when undetected, and he's likely the transmitter. I would like to know if he is infected, so we can both prevent it spreading to him, and inform the other person that he needs to be tested.
So my questions are, how accurate is a blood test for hsv? And in what price range does the test cost to have done? Are there any other tests that don't require a person to have out breaks?
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I recently decided to get a blood test done for HSV 1 and 2. No typical symptoms, but I was reading that some people never have any symptoms, so I wanted to get checked out. I have had about 10 total sexual partners, and only one that I really gave oral sex to. A few women I just kissed a bit down there, but I have always used a condom. I have noticed a slightly red fordyce on my scrotum, and some small zits around my mouth. I also take coconut oil as a general health supplement, one tablespoon a day and use it on my face before bed. I know that it can inhibit viruses including herpes, but I was wondering if it would affect a PCR or an Antibody test for the virus? I expect labs back Monday, and hopefully it comes back negative, if so I will still have to get retested in a few months since I have had recent partners.
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I am 82 and my GP says my BP is far too high (179/90). Can anyone tell me whether it is necessary to have a blood test before treatment can be prescribed. I am a needle/blood phobic and in a state of pnic about this. MY GP has refused treatment unless I have a blood test.
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Is there a blood test that is done to determine if someone has Autoimmune disorder?
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went for std checks .I'm married but work away from home and I have been doubtful even though my relationship with my husband is fine . I guess I can't trust men especially that I spend long times away for work . pcr blood test for hsv1 and hsv2 were negative . but the urine test was positive for hsv 2 . is pcr more accurate or the urine in this case ? I have no symptoms . i recall having one spot years ago that was tiny and went away in few days . do I have hsv2 bases on these findings ?
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Has anyone experienced low BUN and creatinine blood test? How is it common in people who have cirrhosis?
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Is it possible you can have normal liver function tests and a complete blood profile and everything comes back normal but still have liver problems?
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So had the 1 hr glucose test today and mu glucose was 188 highest normal number is only 140 damn it. Then my rbc and hbt was below normal so im assuming im anemic.
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I'm pretty sure I have HSV 2 (herpes) but I never got a culture, never had noticeable recurrent outbreaks, and have had a negative IgG blood test so I'm a little confused and want to know others opinions.
Almost exactly 2 weeks after unprotected intercourse I got:-
-3 hard red bumps/sores in a row in my pubic hair region (about the size of a pencil eraser)
-A few days later: extremely itchy vaginal area and thick, yellowish smelly discharge which lasted a couple days
-Possible "flat" sores on labia minora area (white circular discoloration, did NOT look like typical herpes sore clusters)
-The red sores on my pubic area seemed to crust over/come off (became flat, smooth, and whitish) after about a week then went away. I never noticed any fluid in them or oozing.
I never experienced any swollen lymph nodes, flu-like symptoms, or clusters of white pimple-like sores. I have never noticed any re-current outbreaks. I have no history of HSV 1.
Two years after possible initial outbreak I finally got a blood test: HSV 1 & 2-Specific Ab, IgG; Venipuncture
HSV 1 IgG: <0.91 Negative
HSV 2 IgG: <0.91 Negative
(index: 0.00-0.90, Equivocal .91-1.09)
I know there are lots of cases of people not producing antibodies, so I'm wondering if it's worth getting a Western Blot? Do you think the only explanation for my symptoms is herpes?
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Today I had a ECG stress test on a treadmill and after only two and a half minutes my BP went from 140/67 to 236/51. Has anyone heard of it being so high and with such a difference in systolic over diastolic? The diastolic actually dropped while still exercising. I am told to get an echocardiogram stress test now to determine if it is extreme hypertension rather than CAD. Has anyone else had this? Could it be chiari related. I am thinking my problems are heart related rather than chiari related now, but lucky me, it could be both I suppose.
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I am a 31 year old female who was diagnosed with POTS in 2008 at that time I had a normal stress test and has always been able to tolerate my heart rate going up however over the last month I have become short of breath and have been developing chest pain with minimal activities such as showering. I had another stress test on Friday and I was only able to walk 3 1-2 minutes and became short of breath and developed chest pain also my heart rate was 98 at the start and got up to 164 then it took 2 hours to recover that's right 2 hours not 5-8 min and they had to give me iv fluids then I was sent on my way. The report showed hyperkinetic LV and hyperdynamic LV systolic function. All the dr said was it was essentially normal.
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