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Doctor insights on: Is Blood Work Done Before A Colonoscopy

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Getting a colonoscopy, and along with that there going to do blood work. I am a minor. Will a doctor be able to tell if I have marijuana in my system?

Getting a colonoscopy, and along with that there going to do blood work. I am a minor. Will a doctor be able to tell if I have marijuana in my system?

Drug tests: Are not usually part of the workup for a colonoscopy. But if for some reason your doctor does decide to to a drug screen (more often tested via urine than blood), thc could show up depending on frequency of use. ...Read more

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Dr. Charles Cattano
1,988 doctors shared insights

Colonoscopy (Definition)

Colonoscopy is the procedure of using a long flexible camera to visualize the entire colon from the inside with the option to take pictures, video, perform biopsies, remove polyps, etc. Generally people are sedated and do ...Read more


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Having tummy issues for a few weeks. On acid reduces. Have had colonoscopy and gastric with clear results. Blood work and stool clear.

Having tummy issues for a few weeks. On acid reduces. Have had colonoscopy and gastric with clear results. Blood work and stool clear.

Probiotics: Question is too vague. Try probiotics. Diet likely major role. Lactose or fructose intolerances are common. Follow up with your gastroenterologist. Read more at www.Browardgi.Com. ...Read more

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Do I need to fast for preop blood work for a colonscopy?

Do I need to fast for preop blood work for a colonscopy?

Depends: Most likely not. Just depends on what they are checking. If its lipids or iron studies then yes otherwise lost likely kit. ...Read more

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Diarrhea for a month, colonoscopy, endoscopy done, all cultures & blood work negative, eliminated red meat & dairy, started a probiotic, what else?

Diarrhea for a month, colonoscopy, endoscopy done, all cultures & blood work negative, eliminated red meat & dairy, started a probiotic, what else?

Full workup: It sounds as if you have had a full work up done for diarrhea and remain symptomatic? Stool studies, colon biopsies and capsule endoscopy may be of utility. Ask your doctor for further recommendations. ...Read more

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Can anyone give some suggestions as to what i may have? Ok long story short im sick, I've had xrays done blood work urine test ultra sounds colonoscopy gastroscope exam, even had my gallbladder removed(how this all began) my symptoms are: sever abdominal

Can anyone give some suggestions as to what i may have? Ok long story short im sick, I've had xrays done blood work urine test ultra sounds colonoscopy gastroscope exam, even had my gallbladder removed(how this all began) my symptoms are: sever abdominal

You : You need a thorough checkup, possibly with ct scan or mri, there is no way anyone could pinpoint the diagnosis from the plethora of symptoms you have. More than likely, it is not something you could shrug off; if this were me, i would be in my doctors waiting room or possibly even er today. Please do not take this lightly, you need medical attention now. ...Read more

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Should a colonoscopy be done if a 17 year old girl has moderate blood in her stool for two days?

Should a colonoscopy be done if a 17 year old girl has moderate blood in her stool for two days?

Bloody stool: That is not the first line of treatment. Have her seen, though. There are some simpler tests to be done, first. ...Read more