A member asked:

Could just a coffee 40 mins before blood test for esr and c reactive protein influence the results? need to do these tests today bur forget fasting.

A doctor has provided 1 answer

Dr. Jeff McFadden answered

Specializes in Family Medicine

Don't think so: Caffeine should not affect these results. Besides these are not acute phase reactant tests and take longer to change.

Dr Killian agreed

Answered 6/27/2014

3.9k views

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A member asked:

Could just a coffee 40 mins before blood test for esr and c reactive protein influence the results? need to do these tests today bur forget fasting.

A doctor has provided 1 answer

Dr. Jeff McFadden answered

Dr Killian agreed

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Woke up with urine looking like coffee. Just had a cysto it was ok. Doc did a urinalysis no infec but still large amount of blood and protein. Help!

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What illnesses could cause these results? WBC 12.4 109/L Neutrophil 9.47 109/L Eosinophil 0.44 10*9/L Nucleated red blood cells 0.2 C reactive protein 17 inorganic phosphate 0.69 mmol/L Repeating test next wk alongisde liver function?